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1. Search for light exotic fermions in double-beta decays

Author

Matteo Agostini, Elisabetta Bossio, Alejandro Ibarra, and Xabier Marcano

Subjects
Physics, QC1-999
Abstract

The Standard Model of Particle Physics predicts the double-β decay of certain nuclei with the emission of two active neutrinos. In this letter, we argue that double-β decay experiments could be used to probe models with light exotic fermions through the search for spectral distortions in the electron spectrum with respect to the Standard Model expectations. We consider two concrete examples: models with light sterile neutrinos, singly produced in the double-β decay, and models with a light Z2-odd fermion, pair produced due to a Z2 symmetry. We estimate the discovery potential of a selection of double-β decay experiments and find that future searches will test for the first time a new part of the parameter space of interest at the MeV-mass scale.

Published
2021
Full Text
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2. Polydimethylsiloxane (PDMS) irreversible bonding to untreated plastics and metals for microfluidics applications

Author

Matteo Agostini, Gina Greco, and Marco Cecchini

Subjects
Biotechnology, TP248.13-248.65, Physics, QC1-999
Abstract

In order to properly manipulate liquids into microfluidic networks, an accurate sealing of the device is of paramount importance. Polydimethylsiloxane (PDMS) is ubiquitously used for fabricating microfluidic components, owing to its low cost, easy and fast fabrication, and optical transparency. However, PDMS is characterized by low surface energy, making its bonding to many substrates not trivial. Here is presented a versatile technique for PDMS microchannel bonding on untreated plastic and metal surfaces. First, the PDMS surface is functionalized with (3-aminopropyl) triethoxysilane (APTES) for further cross-linking with epoxy groups. Then, the PDMS-APTES surface is coated with Norland Optical Adhesive 74 (NOA74). Finally, the PDMS-APTES-NOA74 is put in contact with the target material and the glue is cured under a UV light. In order to characterize the bonding strength, a complete PDMS-on-gold microfluidic device is fabricated and tested with increasing injection pressures. Different liquids and a gas (nitrogen) are applied without leakage up to 2 bars, a value comparable to the one reported for the standard glass-PDMS bonding through plasma oxygen activation. The same technique is then successfully replicated with other nonmetallic substrates of interest for microfluidics, i.e., glass, poly(methyl methacrylate), polystyrene, polyethylene terephthalate, cyclic olefin copolymer, demonstrating its great versatility and potential for, but not limited to, microfluidic applications and LOC engineering.

Published
2019
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3. PLEνM:A global and distributed monitoring system of high-energy astrophysical neutrinos

Author

Matthias Huber, Lisa Johanna Schumacher, Matteo Agostini, Mauricio Bustamante, Elisa Resconi, and Foteini Oikonomou

Subjects
Physics, Spectral index, High energy, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Flux, Astronomy, Monitoring system, Declination, KM3NeT, Diffuse flux, Neutrino, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

High-energy astrophysical neutrinos, discovered by IceCube, are now regularly observed, albeit at a low rate due to their low flux. As a result, open questions about high-energy neutrino astrophysics and particle physics remain limited by statistics at best, or unanswered at worst. Fortunately, this situation will improve soon: in the next few years, a host of new neutrino telescopes, currently under planning and construction, will come online. It is natural to combine their collected observing power: we propose the Planetary Neutrino Monitoring System (PLE$\nu$M), a concept for a global repository of high-energy neutrino observations, in order to finally give firm answers to open questions. PLE$\nu$M will reach up to four times the exposure available today by combining the exposures of current and future neutrino telescopes distributed around the world -- IceCube, IceCube-Gen2, Baikal-GVD, KM3NeT, and P-ONE. Depending on the declination and spectral index, PLE$\nu$M will improve the sensitivity to astrophysical neutrinos by up to two orders of magnitude. We present first estimates on the capability of PLE$\nu$M to discover Galactic and extragalactic sources of astrophysical neutrinos and to characterize the diffuse flux of high-energy neutrinos in unprecedented detail., Comment: Presented at the 37th International Cosmic Ray Conference (ICRC 2021). 8 pages, 5 figures

Published
2021

4. First direct comparison of whole beam and single beamlet divergences in a negative ion source with simultaneous BES and CFC tile calorimetry measurements editors-pick

Author

Pierluigi Veltri, Loic Schiesko, Federica Bonomo, M. Ugoletti, Marco Barbisan, A. Pimazzoni, C. Poggi, Bernd Heinemann, R. Delogu, Matteo Agostini, Ursel Fantz, A. Hurlbatt, N. den Harder, G. Serianni, M. Brombin, G. Orozco, and C. Wimmer

Subjects
Tokamak, Neutral Beams, General Physics and Astronomy, 02 engineering and technology, 01 natural sciences, law.invention, Ion, Optics, Deflection (engineering), law, 0103 physical sciences, Negative Ions, Emission spectrum, Divergence (statistics), 010302 applied physics, Physics, business.industry, 021001 nanoscience & nanotechnology, Neutral beam injection, lcsh:QC1-999, Magnetic field, Magnetic Filters, 0210 nano-technology, business, Beam (structure), lcsh:Physics
Abstract

Neutral beam injection (NBI) systems are required for heating and current drive in the next generation fusion experiment ITER, and strict requirements are placed on the beamlet core divergence (

Published
2021

5. Calibration of the Gerda experiment

Author

T. Wester, A.A. Smolnikov, E. V. Demidova, J. Janicskó Csáthy, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, A. V. Veresnikova, D. R. Zinatulina, A. Chernogorov, R. Hiller, T. Comellato, S. Belogurov, I. Zhitnikov, R. Mingazheva, B. Schwingenheuer, C. Bauer, P. Krause, Igor Nemchenok, Stefano Riboldi, L. Shtembari, Bela Majorovits, I. V. Kirpichnikov, Paolo Piseri, J. Huang, O.I. Kochetov, Mikael Hult, M. Misiaszek, M. Miloradovic, Laura Baudis, M. Fomina, S. Hemmer, J. Hakenmüller, G. R. Araujo, S. Schönert, A. M. Gangapshev, C. Vignoli, A. Garfagnini, M. Schütt, Werner Hofmann, O. Schulz, R. Kneißl, I. R. Barabanov, L. Manzanillas, C. Gooch, S. V. Zhukov, Josef Jochum, A. Lubashevskiy, Y. Kermaïdic, K. N. Gusev, V. D'Andrea, K. T. Knöpfle, Ivano Lippi, D. Stukov, Allen Caldwell, C. Wiesinger, V. I. Gurentsov, M. Balata, M. Shirchenko, R. Brugnera, L. B. Bezrukov, K. von Sturm, Bayarto Lubsandorzhiev, V. B. Brudanin, E. Bossio, A. A. Vasenko, E. Shevchik, V. V. Kazalov, V. V. Kuzminov, L. V. Inzhechik, A. Pullia, Franz Dieter Fischer, E. Doroshkevich, Matteo Agostini, F. Salamida, Cinzia Sada, B. Zatschler, M. M. Wojcik, W. Maneschg, E. A. Yanovich, E. Bellotti, M. Schwarz, C. Ransom, Hardy Simgen, G. Zuzel, L. Pertoldi, A.-K. Schütz, N. Di Marco, M. Junker, Manfred Lindner, O. Selivanenko, C. Macolino, M. Laubenstein, V. N. Kornoukhov, V. Bothe, K. Pelczar, Alessandro Bettini, Y. Müller, Guillaume Lutter, A. M. Bakalyarov, Jochen Schreiner, Th. Kihm, V. Biancacci, H. Khushbakht, P. Moseev, Luciano Pandola, L. Rauscher, A. A. Klimenko, A. Zschocke, N. Rumyantseva, P. Grabmayr, and GERDA Collaboration

Subjects
Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Regular Article - Experimental Physics, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, Germanium, Electron, QC770-798, Astrophysics, 01 natural sciences, Standard Model, Nuclear physics, Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, Calibration, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Resolution (electron density), Detector, Instrumentation and Detectors (physics.ins-det), Semiconductor detector, QB460-466, chemistry, GERDA - Abteilung Hinton, High Energy Physics::Experiment, Energy (signal processing)
Abstract

The GERmanium Detector Array (GERDA) collaboration searched for neutrinoless double-$\beta$ decay in $^{76}$Ge with an array of about 40 high-purity isotopically-enriched germanium detectors. The experimental signature of the decay is a monoenergetic signal at Q$_{\beta\beta}$ = 2039.061(7)keV in the measured summed energy spectrum of the two emitted electrons. Both the energy reconstruction and resolution of the germanium detectors are crucial to separate a potential signal from various backgrounds, such as neutrino-accompanied double-$\beta$ decays allowed by the Standard Model. The energy resolution and stability were determined and monitored as a function of time using data from regular $^{228}$Th calibrations. In this work, we describe the calibration process and associated data analysis of the full GERDA dataset, tailored to preserve the excellent resolution of the individual germanium detectors when combining data over several years., Comment: 12 pages, 7 figures

Published
2021

6. Discovery probabilities of Majorana neutrinos based on cosmological data

Author

Francesco Vissani, Giovanni Benato, S. Pirro, S. Dell'Oro, and Matteo Agostini

Subjects
Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Representation (systemics), FOS: Physical sciences, 01 natural sciences, Set (abstract data type), Theoretical physics, MAJORANA, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics
Abstract

We discuss the impact of the cosmological measurements on the predictions of the Majorana mass of the neutrinos, the parameter probed by neutrinoless double-beta decay experiments. Using a minimal set of assumptions, we quantify the probabilities of discovering neutrinoless double-beta decay and introduce a new graphical representation that could be of interest for the community.

Published
2020

7. Final Results of GERDA on the Search for Neutrinoless Double-ß Decay

Author

V. I. Gurentsov, Bayarto Lubsandorzhiev, A. Lubashevskiy, T. Wester, A. A. Vasenko, A.A. Smolnikov, J. Huang, O.I. Kochetov, J. Janicskó Csáthy, R. Mingazheva, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, A. M. Gangapshev, B. Schwingenheuer, R. Brugnera, V. V. Kuzminov, Matteo Agostini, V. V. Kazalov, O. Schulz, E. Doroshkevich, Franz Dieter Fischer, A.-K. Schütz, I. Zhitnikov, I. V. Kirpichnikov, Werner Hofmann, N. Di Marco, Paolo Piseri, G. R. Araujo, D. R. Zinatulina, A. Lazzaro, D. Stukov, M. Schwarz, M. Miloradovic, Allen Caldwell, A. Garfagnini, W. Maneschg, S. Schönert, Josef Jochum, E. A. Yanovich, M. Balata, C. Bauer, Stefano Riboldi, L. Shtembari, F. Salamida, Manfred Lindner, V.B. Brudanin, C. Ransom, Hardy Simgen, I. R. Barabanov, V. D'Andrea, C. Gooch, S. V. Zhukov, P. Krause, Igor Nemchenok, Mikael Hult, K. Panas, K. von Sturm, Bela Majorovits, K. N. Gusev, J. Hakenmüller, M. Misiaszek, R. Kneißl, K. T. Knöpfle, L. Manzanillas, E. V. Demidova, T. Comellato, L. Pertoldi, S. Hemmer, Y. Kermaïdic, Laura Baudis, A. Pullia, G. Zuzel, O. Selivanenko, S. Belogurov, Ivano Lippi, C. Wiesinger, A. V. Veresnikova, M. Shirchenko, A. Chernogorov, M. Fomina, R. Hiller, E. Bossio, M. Schütt, D. Borowicz, L. V. Inzhechik, Cinzia Sada, B. Zatschler, P. Grabmayr, Alessandro Bettini, Y. Müller, C. Macolino, V. Bothe, V. N. Kornoukhov, K. Pelczar, M. Junker, C. Vignoli, Guillaume Lutter, A. M. Bakalyarov, L. Rauscher, A. Zschocke, Jochen Schreiner, V. Biancacci, L. B. Bezrukov, E. Shevchik, M. M. Wojcik, E. Bellotti, Th. Kihm, H. Khushbakht, P. Moseev, Luciano Pandola, A. A. Klimenko, N. Rumyantseva, M. Laubenstein, and GERDA collaboration

Subjects
Physics, Physics - Instrumentation and Detectors, Signal region, General Physics and Astronomy, chemistry.chemical_element, Germanium, 7. Clean energy, 01 natural sciences, Cosmology, High Energy Physics - Experiment, 3. Good health, Semiconductor detector, Nuclear physics, chemistry, GE-76, 0103 physical sciences, GERDA - Abteilung Hinton, Liquid argon, Beta (velocity), SHAPE, High Energy Physics::Experiment, Sensitivity (control systems), 010306 general physics, Nuclear Experiment, Diode
Abstract

The GERmanium Detector Array (GERDA) experiment searched for the lepton-number-violating neutrinoless double-$\beta$ ($0\nu\beta\beta$) decay of $^{76}$Ge, whose discovery would have far-reaching implications in cosmology and particle physics. By operating bare germanium diodes, enriched in $^{76}$Ge, in an active liquid argon shield, GERDA achieved an unprecedently low background index of $5.2\times10^{-4}$ counts/(keV$\cdot$kg$\cdot$yr) in the signal region and met the design goal to collect an exposure of 100 kg$\cdot$yr in a background-free regime. When combined with the result of Phase I, no signal is observed after 127.2 kg$\cdot$yr of total exposure. A limit on the half-life of $0\nu\beta\beta$ decay in $^{76}$Ge is set at $T_{1/2}>1.8\times10^{26}$ yr at 90% C.L., which coincides with the sensitivity assuming no signal., Comment: 7 pages, 3 figures, submitted to Physical Review Letters

Published
2020

8. Search for light exotic fermions in double-beta decays

Author

Alejandro Ibarra, Matteo Agostini, Elisabetta Bossio, and Xabier Marcano

Subjects
Nuclear and High Energy Physics, Sterile neutrino, Particle physics, FOS: Physical sciences, Electron, Parameter space, 01 natural sciences, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Beta (velocity), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Fermion, Symmetry (physics), lcsh:QC1-999, 3. Good health, ddc, High Energy Physics - Phenomenology, High Energy Physics::Experiment, Neutrino, lcsh:Physics
Abstract

The Standard Model of Particle Physics predicts the double-$\beta$ decay of certain nuclei with the emission of two active neutrinos. In this letter, we argue that double-$\beta$ decay experiments could be used to probe models with light exotic fermions through the search for spectral distortions in the electron spectrum with respect to the Standard Model expectations. We consider two concrete examples: models with light sterile neutrinos, singly produced in the double-$\beta$ decay, and models with a light $Z_2$-odd fermion, pair produced due to a $Z_2$ symmetry. We estimate the discovery potential of a selection of double-$\beta$ decay experiments and find that future searches will test for the first time a new part of the parameter space of interest at the MeV-mass scale., Comment: 9 pages, 3 figures. Matches published version

Published
2020

9. Ultra-high-frequency (UHF) surface-acoustic-wave (SAW) microfluidics and biosensors

Author

Marco Cecchini and Matteo Agostini

Subjects
Physics, Flexibility (engineering), surface acoustic waves, biosensor, microfluidics, lab-on-chip, ultra high frequency, Mechanical Engineering, Microfluidics, Surface acoustic wave, Bioengineering, 02 engineering and technology, General Chemistry, Acoustic wave, Lab-on-a-chip, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, law.invention, Ultra high frequency, Mechanics of Materials, law, Scalability, Electronic engineering, Miniaturization, General Materials Science, Electrical and Electronic Engineering, 0210 nano-technology
Abstract

Surface acoustic waves (SAWs) have the potential to become the basis for a wide gamut of lab-on-a-chips (LoCs). These mechanical waves are among the most promising physics that can be exploited for fulfilling all the requirements of commercially appealing devices that aim to replace–or help–laboratory facilities. These requirements are low processing cost of the devices, scalable production, controllable physics, large flexibility of tasks to perform, easy device miniaturization. To date, SAWs are among the small set of technologies able to both manipulate and analyze biological liquids with high performance. Therefore, they address the main needs of microfluidics and biosensing. To this purpose, the use of high-frequency SAWs is key. In the ultra-high-frequency regime (UHF, 300 MHz—3 GHz) SAWs exhibit large sensitivities to molecule adsorption and unparalleled fluid manipulation capabilities, together with overall device miniaturization. The UHF-SAW technology is expected to be the realm for the development of complex, reliable, fully automated, high-performance LoCs. In this review, we present the most recent works on UHF-SAWs for microfluidics and biosensing, with a particular focus on the LoC application. We derive the relevant scale laws, useful formulas, fabrication guidelines, current limitations of the technology, and future developments.

Published
2020

10. First Search for Bosonic Superweakly Interacting Massive Particles with Masses up to 1 MeV/c2 with GERDA

Author

K. Panas, M. M. Wojcik, V. N. Kornoukhov, K. Pelczar, A.-K. Schütz, E. Bellotti, L. B. Bezrukov, E. Shevchik, N. Di Marco, Alessandro Bettini, Manfred Lindner, W. Maneschg, Guillaume Lutter, A. M. Bakalyarov, E. A. Yanovich, T. Wester, A.A. Smolnikov, O.I. Kochetov, Laura Baudis, C. Cattadori, Anna Julia Zsigmond, V. G. Egorov, Kai Zuber, R. Brugnera, O. Selivanenko, R. Mingazheva, Th. Kihm, M. Balata, A. A. Vasenko, V. V. Kuzminov, Matteo Agostini, L. Rauscher, B. Schwingenheuer, M. Junker, Werner Hofmann, V. I. Gurentsov, A. Zschocke, V. Bothe, Paolo Piseri, Allen Caldwell, A. M. Gangapshev, E. Doroshkevich, I. V. Kirpichnikov, H. Khushbakht, P. Moseev, Jochen Schreiner, P. Grabmayr, Luciano Pandola, Bayarto Lubsandorzhiev, L. V. Inzhechik, C. Vignoli, A. Lazzaro, M. Miloradovic, K. von Sturm, A. A. Klimenko, L. Pertoldi, M. Schwarz, A. Garfagnini, O. Schulz, A. Pullia, K. N. Gusev, A. Lubashevskiy, N. Rumyantseva, K. T. Knöpfle, C. Macolino, Cinzia Sada, V.B. Brudanin, C. Ransom, Hardy Simgen, B. Zatschler, I. R. Barabanov, C. Gooch, R. Kneißl, S. V. Zhukov, Josef Jochum, S. Schönert, V. V. Kazalov, Franz Dieter Fischer, T. Comellato, M. Laubenstein, A. V. Veresnikova, A. Chernogorov, R. Hiller, G. Zuzel, P. Krause, Y. Kermaïdic, Ivano Lippi, J. Hakenmüller, C. Wiesinger, M. Shirchenko, V. D'Andrea, M. Fomina, D. Stukov, E. Bossio, F. Salamida, C. Bauer, Stefano Riboldi, M. Misiaszek, M. Schütt, D. Borowicz, J. Janicskó Csáthy, I. Zhitnikov, Igor Nemchenok, Bela Majorovits, E. V. Demidova, S. Belogurov, D. R. Zinatulina, Mikael Hult, and S. Hemmer

Subjects
Physics, Particle physics, 2019-20 coronavirus outbreak, Photon, Coronavirus disease 2019 (COVID-19), Physics::Instrumentation and Detectors, Dark matter, General Physics and Astronomy, chemistry.chemical_element, Germanium, Electron, 7. Clean energy, 01 natural sciences, Pseudoscalar, chemistry, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Dimensionless quantity
Abstract

We present the first search for bosonic superweakly interacting massive particles (super-WIMPs) as keV-scale dark matter candidates performed with the GERDA experiment. GERDA is a neutrinoless double-s decay experiment which operates high-purity germanium detectors enriched in ^{76}Ge in an ultralow background environment at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN in Italy. Searches were performed for pseudoscalar and vector particles in the mass region from 60 keV/c^{2} to 1 MeV/c^{2}. No evidence for a dark matter signal was observed, and the most stringent constraints on the couplings of super-WIMPs with masses above 120 keV/c^{2} have been set. As an example, at a mass of 150 keV/c^{2} the most stringent direct limits on the dimensionless couplings of axionlike particles and dark photons to electrons of g_{ae}

Published
2020

11. Improved measurement of B8 solar neutrinos with 1.5 kt·y of Borexino exposure

Author

R. Tartaglia, G. Bellini, A. Di Ludovico, Aldo Ianni, N. Pilipenko, G. Manuzio, Matthias Laubenstein, M. Redchuk, I. N. Machulin, D. Kryn, J. Martyn, A. V. Derbin, M. D. Skorokhvatov, Michael Wurm, E. Litvinovich, D. D'Angelo, N. Rossi, E. Meroni, R. B. Vogelaar, S. Appel, J. Thurn, R. Roncin, B. Opitz, O. Smirnov, D. A. Semenov, G. Zuzel, Z. Yokley, G. Bonfini, Xuefeng Ding, D. Bravo, Andrea Ianni, Kai Zuber, D. Bick, V. Atroshchenko, Frank Calaprice, L. Lukyanchenko, Sandra Zavatarelli, T. Houdy, A. Porcelli, B. Caccianiga, Gioacchino Ranucci, E. V. Unzhakov, Z. Bagdasarian, Lothar Oberauer, O. Zaimidoroga, H. Wang, M. M. Wojcik, Matteo Agostini, C. Ghiano, Caren Hagner, Aldo Romani, Andrey Formozov, A. Jany, S. Weinz, Y. Suvorov, L. Di Noto, V. V. Kobychev, Alessandra Re, D. Franco, E. V. Hungerford, P. Cavalcante, D. Jeschke, M. Misiaszek, K. Altenmueller, A. Sotnikov, L.F.F. Stokes, D. Basilico, S. Schoenert, S. Davini, V. N. Muratova, F. von Feilitzsch, M. S. Meyer, Lino Miramonti, S. Caprioli, Paolo Lombardi, A. Pocar, Jay Burton Benziger, A. M. Goretti, V. Orekhov, L. Papp, F. Lombardi, G. Lukyanchenko, Fausto Ortica, A. Razeto, D. Guffanti, M. Carlini, B. Neumair, G. Korga, Marco Giammarchi, K. Fomenko, I. S. Drachnev, K. Choi, M. Gromov, A. Caminata, Marco Pallavicini, F. Gabriele, S. Marcocci, M. Toropova, L. Collica, Ö. Penek, G. Testera, C. Galbiati, Livia Ludhova, A. S. Chepurnov, A. Vishneva, and Denis Korablev

Subjects
Physics, Elastic scattering, Particle physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Solar neutrino, Solar neutrino problem, 01 natural sciences, Nuclear physics, Neutrino detector, 0103 physical sciences, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Borexino
Abstract

We report on an improved measurement of the $^8$B solar neutrino interaction rate with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering on electrons in a large volume of liquid scintillator. The measured rate of scattered electrons above 3 MeV of energy is $0.223\substack{+0.015 \\ -0.016}\,(stat)\,\substack{+0.006 \\ -0.006}\,(syst)$ cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of $\Phi\substack{\rm ES \\ ^8\rm B}=2.57\substack{+0.17 \\ -0.18}(stat)\substack{+0.07\\ -0.07}(syst)\times$10$^6$ cm$^{-2}\,$s$^{-1}$. This measurement exploits the active volume of the detector in almost its entirety for the first time, and takes advantage of a reduced radioactive background following the 2011 scintillator purification campaign and of novel analysis tools providing a more precise modeling of the background. Additionally, we set a new limit on the interaction rate of solar $hep$ neutrinos, searched via their elastic scattering on electrons as well as their neutral current-mediated inelastic scattering on carbon, $^{12}$C($\nu,\nu'$)$^{12}$C* ($E_{\gamma}$= 15.1 MeV).

Published
2020

12. The study of solar neutrinos and of non-standard neutrino interactions with Borexino

Author

S. Rottenanger, Luigi Cappelli, S. Schönert, Andrea Ianni, D. Bick, Sandra Zavatarelli, M. Gschwender, Matthias Laubenstein, V. Di Marcello, O. Zaimidoroga, J. Martyn, E. Litvinovich, N. Rossi, L. Lukyanchenko, G. Raikov, Z. Bagdasarian, K. Choi, M. Gromov, A. Jany, N. Pilipenko, B. Neumair, A. Vishneva, V. V. Kobychev, Xuefeng Ding, G. Korga, M. D. Skorokhvatov, Kai Zuber, Ö. Penek, A. M. Goretti, L. Papp, E. Meroni, E. V. Hungerford, D. Basilico, Michael Wurm, G. Bellini, S. Zavatarelli, J. Thurn, M. T. Ranalli, S. Marcocci, S. Kumaran, Fausto Ortica, A. Sotnikov, Tobias Lachenmaier, A. V. Derbin, L. Pietrofaccia, A. Razeto, D. Guffanti, V. Atroshchenko, Marco Giammarchi, D. Franco, G. Bonfini, G. Testera, D. Jeschke, Frank Calaprice, I. Lomskaya, Andrey Formozov, K. Altenmüller, I. S. Drachnev, D. Bravo, F. von Feilitzsch, M. Redchuk, Lothar Oberauer, S. Davini, R. Tartaglia, M. S. Meyer, V. N. Muratova, V. Orekhov, M. M. Wojcik, Matteo Agostini, Aldo Romani, L. Di Noto, M. Nieslony, A. Pocar, Jay Burton Benziger, Lino Miramonti, D. A. Semenov, F. Cavanna, Paolo Lombardi, O. Smirnov, A. Caminata, G. Zuzel, Marco Pallavicini, F. Gabriele, Y. Suvorov, E. V. Unzhakov, A. Di Ludovico, G. Lukyanchenko, Gioacchino Ranucci, G. Manuzio, J. Maricic, Alessandra Re, S. Appel, R. B. Vogelaar, Aldo Ianni, C. Galbiati, Livia Ludhova, A. S. Chepurnov, B. Caccianiga, C. Ghiano, Caren Hagner, I. N. Machulin, A. Di Giacinto, P. Cavalcante, M. Misiaszek, and D. D'Angelo

Subjects
Physics, History, Particle physics, Range (particle radiation), Physics::Instrumentation and Detectors, Oscillation, business.industry, Solar neutrino, High Energy Physics::Phenomenology, Scintillator, Solar energy, Computer Science Applications, Education, Observatory, High Energy Physics::Experiment, ddc:530, Neutrino, business, Borexino
Abstract

The Borexino liquid scintillator neutrino observatory has a unique capability to perform high-precision solar neutrino observations thanks to its exceptional radiopurity and good energy resolution (5% at 1 MeV). A comprehensive study of the pp-chain neutrinos was presented that includes the direct measurements of 7Be, pp and pep neutrino fluxes with the highest precision ever achieved (down to 2.8% in the 7Be component), the 8B with the lowest energy threshold, the best limit on CNO neutrinos and the first Borexino limit on hep neutrinos. These results are important to validate the MSW-LMA oscillation paradigm across the full solar energy range and to exclude possible Non-Standard neutrino Interactions (NSIs). In particular the effects of neutrino-flavor-diagonal Neutral-Current (NC) interactions that modify the vee and vτe couplings while preserving their chiral and flavor structures, have been investigated. At detection, the shape of the electron-recoil spectrum is affected by changes in the vee and vτe couplings, quantified by the parameters ε e L / R and ε τ L / R . New bounds to all four parameters were obtained, quite stringent compared to the global ones. In particular, the best constraint to-date on ε e L was achieved. A comprehensive summary of all the recent results on solar neutrinos from Borexino is reported in the present paper.

Published
2020

13. Turbulent filament properties in L and H-mode regime in the RFX-mod operating as a tokamak

Author

L. Carraro, B. Momo, L. Cordaro, Roberto Cavazzana, M. Veranda, I. Predebon, Silvia Spagnolo, C. Hidalgo, P. Scarin, M. Zuin, Lionello Marrelli, Emilio Martines, B. Zaniol, N. Vianello, G. De Masi, M. E. Puiatti, Paolo Franz, Davide Abate, RFX-mod Team, Monica Spolaore, B. Ph. van Milligen, G. Grenfell, Matteo Agostini, Grenfell, G, Spolaore, M, Abate, D, Carraro, L, Marrelli, L, Predebon, I, Spagnolo, S, Veranda, M, Agostini, M, van Milligen, B, Cavazzana, R, Cordaro, L, De Masi, G, Franz, P, Hidalgo, C, Martines, E, Momo, B, Puiatti, M, Scarin, P, Vianello, N, Zaniol, B, Zuin, M, and RFX-mod Team

Subjects
Nuclear and High Energy Physics, Tokamak, blobs, 01 natural sciences, biasing, 010305 fluids & plasmas, law.invention, Protein filament, Physics::Plasma Physics, law, Mod, 0103 physical sciences, magnetic fluctuations, 010306 general physics, filaments, vorticity, Physics, Turbulence, blob, turbulence, Mode (statistics), Biasing, Mechanics, Vorticity, Condensed Matter Physics, H-mode, filament, magnetic fluctuation
Abstract

The dynamics of turbulent filaments in L and ELM-free H-mode in the RFX-mod device operating as a tokamak is discussed in the present work. L-H transition and sustained H-mode have been achieved in the RFX-mod with the aid of an external electrode biasing (Spolaore et al 2017 Nucl. Fusion 57 116039). Through advanced statistical techniques, turbulent filaments are detected and tracked from the edge to the scrape-off layer (SOL) in a two-dimension floating potential map (measured with a 2D array of Langmuir probes) related with extreme events of a fixed ion saturation current signal in the SOL. While in L-mode filaments travel almost freely, their motion becomes restricted to the near SOL during the induced biasing H-mode. In this region, the background shear decorrelation time becomes shorter than the convective filament time, favouring its suppression. However, the experimental observation of a nearly 'trapped' monopole potential points out the possible role of the vortex selection mechanism. The sign and magnitude of the turbulent parallel vorticity are consistent with the E × B background vorticity in the SOL in this regime, while in L-mode, the inferred turbulent vorticity is always above the background one. The sparse filamentary transport in the far SOL during H-mode is further confirmed from the measurements of a poloidally symmetric array of electrostatic sensors on the wall. Lastly, the radial velocity of filaments in both regimes was discussed in the framework of analytical scalings. Filaments in L-mode exhibit a reasonable agreement with the sheath-limited regime in the cold ion approximation, with a non-negligible associated parallel current density measured with a set of 3-axial pick-up coils installed in the probe head. In H-mode, the collisionality increases near the separatrix while filaments seem to follow the inertial regime before become trapped.

Published
2020
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14. A high precision calorimeter for hunting the sterile neutrino in the SOX experiment

Author

A. Caminata, Marco Pallavicini, S. Weinz, Michael Wurm, Matteo Agostini, L. Di Noto, M. Gschwender, R. Cesereto, S. Rottenanger, J. Martyn, Lothar Oberauer, Luigi Cappelli, S. Schönert, Riccardo Musenich, G. Testera, K. Altenmüller, Sandra Zavatarelli, M. Nieslony, C. Rossi, Tobias Lachenmaier, Stefania Farinon, S. Appel, Birgit Neumair, H. Hess, A. Trantel, and L. Papp

Subjects
Paper, Physics, History, Sterile neutrino, Detector, ddc, Computer Science Applications, Education, Short distance, Calorimeter, Nuclear physics, Thermal, Calibration, Neutrino oscillation, Borexino
Abstract

A thermal calorimetric apparatus was designed, built and calibrated for measuring the activity of the artificial 144 Ce —144 Pr antineutrino source. This measurement will be performed at the Laboratori Nazionali del Gran Sasso in Italy, just before the source insertion in the tunnel under the Borexino detector and a precision better than 1% is required for a disappearance technique measurement in the SOX (Short distance neutrino Oscillation with BoreXino) project. In this work the apparatus is described and the most important results from the calibration measurements are shown, where the final precision of few per thousand is demonstrated.

Published
2020

15. New constraints on supersymmetry using neutrino telescopes

Author

Alejandro Ibarra, Matteo Agostini, H. Niederhausen, Elisa Resconi, K. Krings, Andrea Turcati, Stephan Meighen-Berger, and Andreas Rappelt

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Physics beyond the Standard Model, Astrophysics::High Energy Astrophysical Phenomena, Detector, FOS: Physical sciences, Supersymmetry, 01 natural sciences, lcsh:QC1-999, Charged particle, High Energy Physics - Experiment, ddc, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Full data, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, lcsh:Physics, Energy (signal processing), Lepton
Abstract

We demonstrate that megaton-mass neutrino telescopes are able to observe the signal from long-lived particles beyond the Standard Model, in particular the stau, the supersymmetric partner of the tau lepton. Its signature is an excess of charged particle tracks with horizontal arrival directions and energy deposits between 0.1 and 1 TeV inside the detector. We exploit this previously-overlooked signature to search for stau particles in the publicly available IceCube data. The data shows no evidence of physics beyond the Standard Model. We derive a new lower limit on the stau mass of 320 GeV (95% C.L.) and estimate that this new approach, when applied to the full data set available to the IceCube collaboration, will reach word-leading sensitivity to the stau mass (mτ˜=450GeV).

Published
2019

16. Modeling of GERDA Phase II data

Author

A. Domula, M. Schwarz, Laura Baudis, C. Wiesinger, Paolo Piseri, M. Shirchenko, A. Lazzaro, E. Bossio, I. V. Kirpichnikov, Alessandro Bettini, D. R. Zinatulina, M. Miloradovic, E. V. Demidova, A. V. Veresnikova, A. Chernogorov, R. Hiller, R. Kneißl, S. Belogurov, V. D'Andrea, Stefano Riboldi, V.B. Brudanin, C. Ransom, Igor Nemchenok, M. Schütt, M. Misiaszek, Cinzia Sada, B. Zatschler, Bela Majorovits, C. Macolino, Hardy Simgen, W. Maneschg, E. A. Yanovich, P. Moseev, Luciano Pandola, A. A. Klimenko, C. Vignoli, R. Brugnera, Mikael Hult, D. Borowicz, K. N. Gusev, Jochen Schreiner, L. Pertoldi, F. Fischer, Josef Jochum, N. Rumyantseva, V. V. Kuzminov, Matteo Agostini, V. I. Gurentsov, S. Hemmer, Y. Kermaïdic, J. Janicskó Csáthy, Stefan Schönert, E. Doroshkevich, Bayarto Lubsandorzhiev, L. V. Inzhechik, Ivano Lippi, Manfred Lindner, E. Bellotti, T. Wester, A.A. Smolnikov, K. Panas, I. Zhitnikov, V. Bothe, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, A. Zschocke, L. B. Bezrukov, E. Shevchik, A.-K. Schütz, Marcin Wójcik, V. N. Kornoukhov, M. Fomina, P. Grabmayr, K. Pelczar, N. Di Marco, O.I. Kochetov, Guillaume Lutter, A. M. Bakalyarov, I. R. Barabanov, A. M. Gangapshev, C. Gooch, S. V. Zhukov, Thomas Kihm, O. Selivanenko, R. Mingazheva, B. Schwingenheuer, M. Junker, Oliver Schulz, Alberto Pullia, V. G. Egorov, M. Balata, A. Garfagnini, K. T. Knöpfle, T. Comellato, L. Vanhoefer, Matthias Laubenstein, G. Zuzel, V. V. Kazalov, P. Krause, A. A. Vasenko, Christian Bauer, A. Lubashevskiy, J. Hakenmüller, D. Stukov, Werner Hofmann, F. Salamida, Allen Caldwell, and K. von Sturm

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Spectrum (functional analysis), Detector, Phase (waves), FOS: Physical sciences, Order (ring theory), Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Semiconductor detector, ddc, Region of interest, 0103 physical sciences, Dark Matter and Double Beta Decay (experiments), lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, DOUBLE-BETA DECAY, Sensitivity (control systems), Nuclear Experiment (nucl-ex), Neutrino, 010306 general physics, Nuclear Experiment
Abstract

The GERmanium Detector Array (Gerda) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double-beta (0νββ) decay of 76Ge. The technological challenge of Gerda is to operate in a “background-free” regime in the region of interest (ROI) after analysis cuts for the full 100 kg·yr target exposure of the experiment. A careful modeling and decomposition of the full-range energy spectrum is essential to predict the shape and composition of events in the ROI around Qββ for the 0νββ search, to extract a precise measurement of the half-life of the double-beta decay mode with neutrinos (2νββ) and in order to identify the location of residual impurities. The latter will permit future experiments to build strategies in order to further lower the background and achieve even better sensitivities. In this article the background decomposition prior to analysis cuts is presented for Gerda Phase II. The background model fit yields a flat spectrum in the ROI with a background index (BI) of $$ {16.04}_{-0.85}^{+0.78}\cdotp {10}^{-3} $$ 16.04 − 0.85 + 0.78 · 10 − 3 cts/(keV·kg·yr) for the enriched BEGe data set and $$ {14.68}_{-0.52}^{+0.47}\cdotp {10}^{-3} $$ 14.68 − 0.52 + 0.47 · 10 − 3 cts/(keV·kg·yr) for the enriched coaxial data set. These values are similar to the one of Phase I despite a much larger number of detectors and hence radioactive hardware components.

Published
2019

17. Statistical methods in sterile neutrino experiments

Author

Birgit Neumair and Matteo Agostini

Subjects
Physics, History, Sterile neutrino, Particle physics, Computer Science Applications, Education, ddc
Abstract

We compare the current statistical methods applied to short-baseline neutrino oscillation experiments looking for light sterile neutrinos. The interpretation of the reconstructed confidence regions differs because of the different definition of the alternative hypothesis in the hypothesis test. When the alternative hypothesis extends over the whole physical allowed parameter space of the oscillation parameters, proper confidence regions are obtained both in case of a limit and a signal. Since the different definition of the alternative hypothesis prevents from a direct comparison of the results, a standardized analysis is proposed.

Published
2019

18. Search for low-energy neutrinos from astrophysical sources with Borexino

Author

V. Atroshchenko, Alessandra Re, R. Tartaglia, D. Jeschke, E. V. Hungerford, Lothar Oberauer, Ö. Penek, J. Thurn, G. Bonfini, Frank Calaprice, Matteo Agostini, M. T. Ranalli, A. Sotnikov, Matthias Laubenstein, S. Appel, G. Lukyanchenko, G. Testera, S. Marcocci, Andrey Formozov, S. Kumaran, L. Lukyanchenko, K. Choi, Y. Suvorov, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, An. Ianni, F. Cavanna, B. Caccianiga, G. Zuzel, F. von Feilitzsch, M. Gromov, R. B. Vogelaar, E. Meroni, I. N. Machulin, Cristiano Galbiati, D. A. Semenov, A. V. Derbin, V. Orekhov, G. Bellini, D. D'Angelo, L. Papp, M. Redchuk, A. Jany, I. Lomskaya, V. Di Marcello, O. Zaimidoroga, N. Rossi, I. S. Drachnev, Tobias Lachenmaier, J. Martyn, Marco Giammarchi, E. Litvinovich, V. N. Muratova, V. V. Kobychev, M. Gschwender, Fausto Ortica, A. Vishneva, M. D. Skorokhvatov, Michael Wurm, D. Guffanti, J. Maricic, Xuefeng Ding, Lino Miramonti, D. Basilico, A. Di Ludovico, C. Ghiano, Kai Zuber, Caren Hagner, G. Korga, G. Manuzio, B. Neumair, M. Meyer, L. Pietrofaccia, D. Bick, Sandra Zavatarelli, A. Di Giacinto, N. Pilipenko, A. Razeto, P. Cavalcante, D. Bravo, D. Franco, M. Misiaszek, Paolo Lombardi, Gioacchino Ranucci, A. Pocar, S. Rottenanger, S. Davini, O. Smirnov, S. Schönert, E. V. Unzhakov, Marcin Wójcik, K. Altenmüller, M. Nieslony, A. Caminata, Marco Pallavicini, F. Gabriele, Barbara Ricci, G. Raikov, Z. Bagdasarian, L. Cappelli, Jay Burton Benziger, Aldo Romani, L. Di Noto, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Borexino, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Cappelli, L, Cavalcante, P, Cavanna, F, Chepurnov, A, Choi, K, D'Angelo, D, Davini, S, Derbin, A, Di Giacinto, A, Di Marcello, V, Ding, X, Di Ludovico, A, Di Noto, L, Drachnev, I, Formozov, A, Franco, D, Gabriele, F, Galbiati, C, Gschwender, M, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kumaran, S, Kobychev, V, Korga, G, Lachenmaier, T, Laubenstein, M, Litvinovich, E, Lombardi, P, Lomskaya, I, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Maricic, J, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Nieslony, M, Oberauer, L, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pietrofaccia, L, Pilipenko, N, Pocar, A, Raikov, G, Ranalli, M, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Ricci, B, Romani, A, Rossi, N, Rottenanger, S, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Unzhakov, E, Vishneva, A, Vogelaar, R, von Feilitzsch, F, Wojcik, M, Wurm, M, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
antineutrinos, Physics - Instrumentation and Detectors, solar flares, magnetic field: high, neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, scintillation counter: liquid, elastic scattering, antineutrino/e: particle identification, 01 natural sciences, 7. Clean energy, neutrino: flux, law.invention, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), law, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], neutrino: supernova, 26.65.+t, 010303 astronomy & astrophysics, Borexino, Elastic scattering, Physics, Solar flare, Supernova Relic Neutrinos, neutrino: energy spectrum, S067EB8, neutrinos, Instrumentation and Detectors (physics.ins-det), neutrino: magnetic moment, Diffuse Supernova Neutrino Background, 3. Good health, Supernova, Homestake, ddc:540, neutrino: flavor, Antineutrino, Neutrino, 97.60.Bw, Homestake experiment, Flare, antineutrino/e: flux, Antineutrinos, 13.15.+G, 26.65.+T, 29.40.Mc, Diffuse supernova neutrino background, Neutrinos, Solar flares, Supernova relic neutrinos, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Supernova relic neutrino, supernova relic neutrinos, NO, Nuclear physics, 13.15.+g, PE2_2, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], diffuse supernova neutrino background, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Astronomy and Astrophysics, neutrino: particle source, Gran Sasso, Solar Flares, 13. Climate action, spectral, High Energy Physics::Experiment, experimental results
Abstract

We report on searches for neutrinos and antineutrinos from astrophysical sources performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. Electron antineutrinos ($\bar{\nu}_e$) are detected in an organic liquid scintillator through the inverse $\beta$-decay reaction. In the present work we set model-independent upper limits in the energy range 1.8-16.8 MeV on neutrino fluxes from unknown sources that improve our previous results, on average, by a factor 2.5. Using the same data set, we first obtain experimental constraints on the diffuse supernova $\bar{\nu}_e$ fluxes in the previously unexplored region below 8 MeV. A search for $\bar{\nu}_e$ in the solar neutrino flux is also presented: the presence of $\bar{\nu}_e$ would be a manifestation of a non-zero anomalous magnetic moment of the neutrino, making possible its conversion to antineutrinos in the strong magnetic field of the Sun. We obtain a limit for a solar $\bar{\nu}_e$ flux of 384 cm$^{-2}$s$^{-1}$ (90% C.L.), assuming an undistorted solar $^{8}$B neutrinos energy spectrum, that corresponds to a transition probability $p_{ \nu_e \rightarrow \bar\nu_{e}}$ 1.8 MeV. At lower energies, by investigating the spectral shape of elastic scattering events, we obtain a new limit on solar $^{7}$Be-$\nu_e$ conversion into $\bar{\nu}_e$ of $p_{ \nu_e \rightarrow \bar \nu_{e}}, Comment: 18 pages, 8 figures, 4 tables, 73 references

Published
2019

19. Results from Borexino on solar and geo-neutrinos

Author

F. von Feilitzsch, L. Di Noto, J. Martyn, E. Litvinovich, N. Rossi, Xuefeng Ding, Andrey Formozov, I. N. Machulin, I. S. Drachnev, A. Di Ludovico, Matteo Agostini, A. Caminata, Marco Pallavicini, F. Gabriele, Sandra Zavatarelli, A. Porcelli, M. D. Skorokhvatov, Michael Wurm, D. D'Angelo, Andrea Ianni, D. Jeschke, G. Bellini, D. A. Semenov, O. Smirnov, T. Houdy, A. M. Goretti, V. Atroshchenko, V. Orekhov, G. Manuzio, K. Altenmüller, K. Choi, M. Gromov, A. V. Derbin, E. V. Unzhakov, Kai Zuber, Jay Burton Benziger, M. Carlini, S. Davini, D. Franco, Lothar Oberauer, M. S. Meyer, N. Pilipenko, Matthias Laubenstein, M. Nieslony, C. Galbiati, B. Neumair, D. Basilico, J. Maricic, S. Appel, L. Pietrofaccia, Livia Ludhova, R. B. Vogelaar, S. Rottenanger, G. Korga, K. Fomenko, R. Tartaglia, L. Papp, Tobias Lachenmaier, Marco Giammarchi, A. Razeto, Y. Suvorov, Luigi Cappelli, G. Raikov, Z. Bagdasarian, S. Schönert, M. Gschwender, E. Meroni, Fausto Ortica, A. S. Chepurnov, Alessandra Re, Lino Miramonti, F. Cavanna, Gioacchino Ranucci, S. Weinz, D. Guffanti, A. Vishneva, J. Thurn, A. Pocar, G. Bonfini, Paolo Lombardi, Frank Calaprice, B. Caccianiga, S. Marcocci, G. Lukyanchenko, L. Collica, L. Lukyanchenko, Ö. Penek, O. Zaimidoroga, M. M. Wojcik, V. V. Kobychev, Aldo Romani, G. Testera, V. N. Muratova, S. Kumaran, C. Ghiano, D. Bravo, M. Redchuk, P. Cavalcante, M. Misiaszek, S. Caprioli, G. Zuzel, A. Jany, L.F.F. Stokes, E. V. Hungerford, A. Sotnikov, and Aldo Ianni

Subjects
Physics, Physics::Instrumentation and Detectors, Solar spectra, business.industry, Solar neutrino, Detector, Astronomy, Solar energy, Nuclear fusion, High Energy Physics::Experiment, Neutrino, business, Borexino, Solar data
Abstract

Borexino is running at the INFN Gran Sasso National Laboraries, Italy since 2007. Its technical distinctive feature is the unprecedented ultralow background of the inner scintillating core, which is the foundation for the outstanding achievements accumulated by this experiment. In this contribution, after recalling the main features of the detector, the impressive solar data gathered so far by Borexino will be summarized. Special emphasis will be given to the illustration of the recent release of the fluxes as stemming from the simultaneous real time spectroscopy of the neutrinos from the entire $pp$ nuclear fusion chain in the Sun, opening with the remarkable 2.7% accuracy of the ⁷Be flux the era of precision measurements also in the realm of the sub-MeV solar neutrinos. Such results put Borexino in the unique situation of being the only detector able to perform solar neutrino spectroscopy over the entire solar spectrum; the counterpart of this peculiar status, in the flavor conversion interpretation of the solar neutrino data, is the capability of Borexino alone to perform the full validation across the solar energy range of the MSW-LMA paradigm. This contribution will be concluded with an account of the Borexino accomplishments in the geo-neutrino field, marked by the detection of the geo-neutrino signal with a significance as high as $5.9\sigma$.

Published
2019

20. REVIEW ON SOLAR NEUTRINO STUDIES BOREXINO

Author

L. Papp, C. Ghiano, R. Tartaglia, Caren Hagner, A. Pocar, Fausto Ortica, O. Smirnov, L. Lukyanchenko, P. Cavalcante, C. Galbiati, Livia Ludhova, A. S. Chepurnov, M. M. Wojcik, M. Misiaszek, S. Appel, N. Pilipenko, E. V. Unzhakov, G. Bonfini, S. Marcocci, Aldo Romani, E. V. Hungerford, M. Toropova, Frank Calaprice, Lino Miramonti, A. Sotnikov, Aldo Ianni, D. Bick, Sandra Zavatarelli, Andrey Formozov, G. Manuzio, A. Porcelli, Z. Yokley, A. Di Ludovico, Gioacchino Ranucci, K. Altenmüller, M. D. Skorokhvatov, Michael Wurm, Matteo Agostini, A. M. Goretti, G. Testera, L.F.F. Stokes, S. Caprioli, D. A. Semenov, V. Atroshchenko, F. Froborg, D. Bravo, Z. Bagdasarian, J. Thurn, R. Roncin, Denis Korablev, T. Houdy, B. Caccianiga, S. Schönert, Kai Zuber, G. Zuzel, V. N. Muratova, A. Caminata, D. Kryn, Marco Pallavicini, F. Gabriele, K. Choi, M. Gromov, M. Carlini, J. Martyn, S. Weinz, E. Litvinovich, N. Rossi, Lothar Oberauer, D. Franco, A. V. Derbin, S. Davini, B. Neumair, Matthias Laubenstein, A. Jany, L. Di Noto, B. Opitz, G. Korga, G. Lukyanchenko, D. Basilico, K. Fomenko, I. N. Machulin, Xuefeng Ding, F. von Feilitzsch, Marco Giammarchi, F. Lombardi, D. D'Angelo, E. Meroni, A. Razeto, G. Bellini, Y. Suvorov, Andrea Ianni, D. Jeschke, Jay Burton Benziger, I. S. Drachnev, Alessandra Re, O. Zaimidoroga, H. Wang, V. V. Kobychev, R. B. Vogelaar, A. Vishneva, M. S. Meyer, and Paolo Lombardi

Subjects
Physics, Solar neutrino, Astronomy, Borexino
Published
2019

21. Limit on the effective magnetic moment of solar neutrinos using Borexino data

Author

Ö. Penek, K. Altenmüller, D. A. Semenov, Z. Yokley, V. Atroshchenko, R. Tartaglia, G. Testera, T. Houdy, Lothar Oberauer, F. von Feilitzsch, L. Di Noto, G. Bellini, S. Marcocci, I. N. Machulin, M. D. Skorokhvatov, Michael Wurm, M. Toropova, L. Collica, Matthias Laubenstein, V. N. Muratova, S. Rottenanger, E. Meroni, D. Basilico, C. Galbiati, D. D'Angelo, Livia Ludhova, S. Davini, A. S. Chepurnov, A. Caminata, Marco Pallavicini, S. Schönert, M. Gschwender, F. Gabriele, A. V. Derbin, A. Jany, Denis Korablev, R. B. Vogelaar, N. Pilipenko, M. S. Meyer, L.F.F. Stokes, Y. Suvorov, S. Weinz, G. Manuzio, M. Carlini, F. Lombardi, G. Bonfini, E. V. Hungerford, J. Martyn, D. Bick, Sandra Zavatarelli, M. Redchuk, I. Bolognini, Frank Calaprice, E. Litvinovich, Paolo Lombardi, N. Rossi, B. Neumair, A. M. Goretti, A. Sotnikov, Aldo Ianni, A. Porcelli, B. Opitz, A. Razeto, L. Lukyanchenko, D. Franco, G. Korga, K. Fomenko, Xuefeng Ding, J. Thurn, J. Maricic, S. Appel, A. Di Ludovico, Andrey Formozov, O. Zaimidoroga, V. V. Kobychev, Alessandra Re, Matteo Agostini, G. Zuzel, V. Orekhov, L. Papp, B. Caccianiga, Gioacchino Ranucci, Fausto Ortica, D. Guffanti, D. Bravo, Tobias Lachenmaier, Marco Giammarchi, S. Caprioli, I. S. Drachnev, C. Ghiano, Caren Hagner, P. Cavalcante, M. Misiaszek, K. Choi, M. Gromov, M. M. Wojcik, Aldo Romani, Andrea Ianni, D. Jeschke, A. Pocar, O. Smirnov, E. V. Unzhakov, Lino Miramonti, F. Cavanna, A. Vishneva, Kai Zuber, L. Pietrofaccia, G. Lukyanchenko, G. Raikov, Z. Bagdasarian, and Jay Burton Benziger

Subjects
Physics, Particle physics, Electromagnetic interaction, Magnetic moment, Solar neutrino, Limit (mathematics), Borexino
Published
2019

22. Solar neutrino physics with Borexino

Author

M. Gschwender, Matthias Laubenstein, R. Tartaglia, Matteo Agostini, O. Smirnov, S. Marcocci, G. Korga, Lino Miramonti, L. Papp, Y. Suvorov, Z. Bagdasarian, M. D. Skorokhvatov, Michael Wurm, A. V. Derbin, L. Lukyanchenko, Fausto Ortica, E. Meroni, M. Redchuk, G. Bellini, J. Martyn, E. Litvinovich, N. Pilipenko, S. Caprioli, N. Rossi, Andrea Ianni, Sandra Zavatarelli, G. Raikov, A. Pocar, V. Atroshchenko, Tobias Lachenmaier, Xuefeng Ding, G. Bonfini, M. M. Wojcik, D. Franco, Marco Giammarchi, Frank Calaprice, S. Rottenanger, D. Guffanti, Lothar Oberauer, A. Caminata, F. Gabriele, Alessandra Re, Aldo Romani, R. B. Vogelaar, Kai Zuber, L. Di Noto, S. Kumaran, D. Jeschke, A. Di Ludovico, Luigi Cappelli, F. von Feilitzsch, S. Davini, S. Schönert, Aldo Ianni, G. Manuzio, L. Pietrofaccia, V. Orekhov, T. Houdy, J. Maricic, I. N. Machulin, Cristiano Galbiati, Marco Pallavicini, A. Vishneva, D. D'Angelo, Gioacchino Ranucci, K. Altenmüller, A. Porcelli, M. Carlini, S. Appel, J. Thurn, V. N. Muratova, M. Nieslony, C. Ghiano, G. Lukyanchenko, B. Neumair, M. Meyer, Paolo Lombardi, K. Fomenko, K. Choi, F. Cavanna, D. Bravo, L. Collica, B. Caccianiga, P. Cavalcante, O. Zaimidoroga, A. Formozov, D. A. Semenov, M. Misiaszek, L.F.F. Stokes, V. V. Kobychev, Jay Burton Benziger, S. Weinz, E. V. Hungerford, A. Sotnikov, A. Jany, G. Zuzel, I. S. Drachnev, D. Basilico, A. Razeto, M. Gromov, Ö. Penek, G. Testera, E. V. Unzhakov, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), BOREXINO, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)

Subjects
fusion, Physics - Instrumentation and Detectors, neutrino: solar, Physics::Instrumentation and Detectors, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), Nuclear Experiment, 010303 astronomy & astrophysics, Borexino, Physics, p p: fusion, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Instrumentation and Detectors (physics.ins-det), Gran Sasso, Automatic Keywords, Physics::Space Physics, Underground laboratory, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, experimental results
Abstract

We present the most recent solar neutrino results from the Borexino experiment at the Gran Sasso underground laboratory. In particular, refined measurements of all neutrinos produced in the {\it pp} fusion chain have been made. It is the first time that the same detector measures the entire range of solar neutrinos at once. These new data weakly favor a high-metallicity Sun. Prospects for measuring CNO solar neutrinos are also discussed., Proceedings for the 15th International Workshop on Tau Lepton Physics (TAU2018), 24-28 September 2018, Amsterdam, The Netherlands. arXiv admin note: substantial text overlap with arXiv:1812.02326

Published
2019

23. Physics research on the TCV tokamak facility: From conventional to alternative scenarios and beyond

Author

G. Tomaž, M. Weiland, J. Gath, Antti Hakola, Kevin Verhaegh, A.J. Thornton, Matthew Carr, J. Juul Rasmussen, S. Costea, Jorge Morales, A. Perek, X. Feng, F. Pesamosca, Marcelo Baquero-Ruiz, N. Vianello, A. Dal Molin, N. M. T. Vu, D. Hogeweij, G. Calabrò, Tom Wauters, Christian Hopf, E. Alessi, Aitor J. Garrido, Justin Ball, Daniele Carnevale, A. Czarnecka, S. Garavaglia, G. Ferro, George Wilkie, N. Krawczyk, M. Nocente, H. De Oliveira, Ivo Furno, W. Bin, O. Chellai, Stefano Coda, Fulvio Auriemma, Yann Camenen, W. A. J. Vijvers, Christian Theiler, A. N. Karpushov, M. Faitsch, Jérôme Bucalossi, Paolo Ricci, Antoine Merle, T. C. Blanken, Cristian Galperti, Duccio Testa, Ambrogio Fasoli, Y. Andrebe, F. Bagnato, S. Nowak, J. R. Harrison, O. Vasilovici, M. E. Puiatti, Stefan Kragh Nielsen, J. S. Allcock, L. Calacci, Matteo Zuin, V. Piergotti, P. Chmielewski, P. Molina Cabrera, Taina Kurki-Suonio, D. Micheletti, Emanuele Poli, Nuno Cruz, M. Farnik, Jonathan Graves, Alessandro Pau, Olivier Février, N. A. Kirneva, Bruce Lipschultz, E. Lazzaro, E. Havlickova, G. Giruzzi, Jens Madsen, L. Stipani, D. Brida, Ch. Schlatter, M. Wensing, R. O. Pavlichenko, F. Nespoli, J. Decker, Eva Macusova, Fulvio Militello, Nicola Offeddu, Heinz Isliker, A. Zisis, A. Marco, Laurie Porte, Marco Gobbin, Anna Salmi, S. Vartanian, J. Sinha, Matthias Komm, M. Spolaore, Anders Nielsen, T. Happel, R. D. Nem, A. Iantchenko, V.V. Plyusnin, C. Tsironis, V. Igochine, R. M. McDermott, Pär Strand, Benjamin Daniel Dudson, T. Ravensbergen, V. P. Loschiavo, H. Arnichand, E. Viezzer, Fabio Villone, Carlo Sozzi, Z. Huang, V. Pericoli Ridolfini, B. Linehan, L. Hesslow, P. Buratti, A. Casolari, M. Bernert, P. Mantica, H. Weisen, J-M Moret, Maiko Yoshida, N. Bonanomi, S. Feng, A. A. Teplukhina, Jakub Urban, F. Carpanese, C. Piron, S. Allan, Minh Quang Tran, C. Marini, Artur Palha, F.P. Orsitto, Roberto Ambrosino, A. S. Tema Biwole, Harry M. Meyer, Davide Galassi, J. Mlynář, N. Christen, M. Wischmeier, Mathias Hoppe, P. David, J. Horacek, M. Maraschek, G. Ciraolo, R. R. Sheeba, J. Zebrowski, M. Dreval, M. Silva, K. Gałązka, Olivier Sauter, Laure Vermare, A. Gallo, C. Reux, M. Gospodarczyk, O. Bogar, Roman Schrittwieser, C. Marchetto, Patrick J. McCarthy, Joël Rosato, G. Pucella, K. Wu, Volker Naulin, Bojan Mavkov, S. Elmore, Lorella Carraro, Gustavo Granucci, Christopher N. Bowman, O. Kudlacek, M. Gruca, A. Jardin, Federico Felici, Didier Mazon, D. C. van Vugt, D. Douai, Jose Boedo, Raffaele Albanese, U. A. Sheikh, Hugo Bufferand, R. Lombroni, T. Pütterich, Benedikt Geiger, X. Llobet, Izaskun Garrido, J.-Ph. Hogge, J. Ayllon-Guerola, Nicolas Fedorczak, Timothy Goodman, A. Mariani, E. Maljaars, Matteo Agostini, Lorenzo Frassinetti, S. E. Sharapov, C.K. Tsui, Vladimir E. Moiseenko, Robert Mumgaard, Amanda Hubbard, L. Pigatto, F. Matos, D. S. Gahle, Roberto Maurizio, I. Voitsekhovitch, Paolo Zanca, J. Buermans, A. Fil, T. Lunt, S. S. Henderson, D. Ricci, M. Kong, Ondrej Ficker, Matthias Wiesenberger, L. Cordaro, P. Innocente, Roberto Paccagnella, Benoit Labit, N. Rispoli, M. Rabinski, G. F. Harrer, Roch Kwiatkowski, A. Moro, A. A. Beletskii, M. Vallar, M. Reich, F. Reimold, P. Piovesan, Mirko Salewski, J. Hawke, Giuseppe Gorini, J. Čeřovský, F. Causa, H. Reimerdes, B. Esposito, Jernej Kovacic, P. V. Kazantzidis, H. Anand, Gergely Papp, M. Valisa, K. Mitosinkova, Vlado Menkovski, F. Bombarda, M. Fontana, Tommaso Bolzonella, Pascale Hennequin, T. Gyergyek, D. L. Keeling, T. Eich, M. Garcia-Munoz, Stefano Alberti, P. Blanchard, F. Bouquey, R. Shousha, M. Scheffer, B. S. Schneider, R. Jacquier, D. Choi, Nick Walkden, Ola Embréus, C. Ionita Schrittwieser, S. Saarelma, J. Garcia, M. G. Dunne, M. Tomes, R. Zagórski, Y. R. Martin, A. Kappatou, B. P. Duval, T. Tala, Swiss National Science Foundation, Universita degli studi di Napoli 'Parthenope' [Napoli], Max-Planck-Institut für Plasmaphysik [Garching] (IPP), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, Consiglio Nazionale delle Ricerche [Roma] (CNR), Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas (CRPP), Department of Physics [Stockholm], Stockholm University, Laboratoire de Physique des Plasmas (LPP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), EURATOM/CCFE Fusion Association, Culham Science Centre [Abingdon], York Plasma Institute (YPI), University of York [York, UK], Faculty of Mathematics and Physics [Praha/Prague], Charles University [Prague] (CU), Association EURATOM-CEA (CEA/DSM/DRFC), University College Cork (UCC), Department of Mechanical and Manufacturing Engineering [Aalborg] (M-TECH), Aalborg University [Denmark] (AAU), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), Instituto de Plasmas e Fusão Nuclear [Lisboa] (IPFN), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Université Paris-Saclay-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École polytechnique (X)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Coda, S, Agostini, M, Albanese, R, Alberti, S, Alessi, E, Allan, S, Allcock, J, Ambrosino, R, Anand, H, Andrebe, Y, Arnichand, H, Auriemma, F, Ayllon-Guerola, J, Bagnato, F, Ball, J, Baquero-Ruiz, M, Beletskii, A, Bernert, M, Bin, W, Blanchard, P, Blanken, T, Boedo, J, Bogar, O, Bolzonella, T, Bombarda, F, Bonanomi, N, Bouquey, F, Bowman, C, Brida, D, Bucalossi, J, Buermans, J, Bufferand, H, Buratti, P, Calabro, G, Calacci, L, Camenen, Y, Carnevale, D, Carpanese, F, Carr, M, Carraro, L, Casolari, A, Causa, F, Cerovsky, J, Chellai, O, Chmielewski, P, Choi, D, Christen, N, Ciraolo, G, Cordaro, L, Costea, S, Cruz, N, Czarnecka, A, Dal Molin, A, David, P, Decker, J, De Oliveira, H, Douai, D, Dreval, M, Dudson, B, Dunne, M, Duval, B, Eich, T, Elmore, S, Embreus, O, Esposito, B, Faitsch, M, Farnik, M, Fasoli, A, Fedorczak, N, Felici, F, Feng, S, Feng, X, Ferro, G, Fevrier, O, Ficker, O, Fil, A, Fontana, M, Frassinetti, L, Furno, I, Gahle, D, Galassi, D, Galazka, K, Gallo, A, Galperti, C, Garavaglia, S, Garcia, J, Garcia-Munoz, M, Garrido, A, Garrido, I, Gath, J, Geiger, B, Giruzzi, G, Gobbin, M, Goodman, T, Gorini, G, Gospodarczyk, M, Granucci, G, Graves, J, Gruca, M, Gyergyek, T, Hakola, A, Happel, T, Harrer, G, Harrison, J, Havlickova, E, Hawke, J, Henderson, S, Hennequin, P, Hesslow, L, Hogeweij, D, Hogge, J, Hopf, C, Hoppe, M, Horacek, J, Huang, Z, Hubbard, A, Iantchenko, A, Igochine, V, Innocente, P, Ionita Schrittwieser, C, Isliker, H, Jacquier, R, Jardin, A, Kappatou, A, Karpushov, A, Kazantzidis, P, Keeling, D, Kirneva, N, Komm, M, Kong, M, Kovacic, J, Krawczyk, N, Kudlacek, O, Kurki-Suonio, T, Kwiatkowski, R, Labit, B, Lazzaro, E, Linehan, B, Lipschultz, B, Llobet, X, Lombroni, R, Loschiavo, V, Lunt, T, Macusova, E, Madsen, J, Maljaars, E, Mantica, P, Maraschek, M, Marchetto, C, Marco, A, Mariani, A, Marini, C, Martin, Y, Matos, F, Frisina, M, Mavkov, B, Mazon, D, Mccarthy, P, Mcdermott, R, Menkovski, V, Merle, A, Meyer, H, Micheletti, D, Militello, F, Mitosinkova, K, Mlynar, J, Moiseenko, V, Molina Cabrera, P, Morales, J, Moret, J, Moro, A, Mumgaard, R, Naulin, V, Nem, R, Nespoli, F, Nielsen, A, Nielsen, S, Nocente, M, Nowak, S, Offeddu, N, Orsitto, F, Paccagnella, R, Palha, A, Papp, G, Pau, A, Pavlichenko, R, Perek, A, Pericoli Ridolfini, V, Pesamosca, F, Piergotti, V, Pigatto, L, Piovesan, P, Piron, C, Plyusnin, V, Poli, E, Porte, L, Pucella, G, Puiatti, M, Putterich, T, Rabinski, M, Juul Rasmussen, J, Ravensbergen, T, Reich, M, Reimerdes, H, Reimold, F, Reux, C, Ricci, D, Ricci, P, Rispoli, N, Rosato, J, Saarelma, S, Salewski, M, Salmi, A, Sauter, O, Scheffer, M, Schlatter, C, Schneider, B, Schrittwieser, R, Sharapov, S, Sheeba, R, Sheikh, U, Shousha, R, Silva, M, Sinha, J, Sozzi, C, Spolaore, M, Stipani, L, Strand, P, Tala, T, Tema Biwole, A, Teplukhina, A, Testa, D, Theiler, C, Thornton, A, Tomaz, G, Tomes, M, Tran, M, Tsironis, C, Tsui, C, Urban, J, Valisa, M, Vallar, M, Van Vugt, D, Vartanian, S, Vasilovici, O, Verhaegh, K, Vermare, L, Vianello, N, Viezzer, E, Vijvers, W, Villone, F, Voitsekhovitch, I, Vu, N, Walkden, N, Wauters, T, Weiland, M, Weisen, H, Wensing, M, Wiesenberger, M, Wilkie, G, Wischmeier, M, Wu, K, Yoshida, M, Zagorski, R, Zanca, P, Zebrowski, J, Zisis, A, Zuin, M, Università degli Studi di Napoli 'Parthenope' = University of Naples (PARTHENOPE), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Université Paris-Sud - Paris 11 (UP11)-Observatoire de Paris, Coda, S., Agostini, M., Albanese, R., Alberti, S., Alessi, E., Allan, S., Allcock, J., Ambrosino, R., Anand, H., Andrebe, Y., Arnichand, H., Auriemma, F., Ayllon-Guerola, J. M., Bagnato, F., Ball, J., Baquero-Ruiz, M., Beletskii, A. A., Bernert, M., Bin, W., Blanchard, P., Blanken, T. C., Boedo, J. A., Bogar, O., Bolzonella, T., Bombarda, F., Bonanomi, N., Bouquey, F., Bowman, C., Brida, D., Bucalossi, J., Buermans, J., Bufferand, H., Buratti, P., Calabro, G., Calacci, L., Camenen, Y., Carnevale, D., Carpanese, F., Carr, M., Carraro, L., Casolari, A., Causa, F., Cerovsky, J., Chellai, O., Chmielewski, P., Choi, D., Christen, N., Ciraolo, G., Cordaro, L., Costea, S., Cruz, N., Czarnecka, A., Dal Molin, A., David, P., Decker, J., De Oliveira, H., Douai, D., Dreval, M. B., Dudson, B., Dunne, M., Duval, B. P., Eich, T., Elmore, S., Embreus, O., Esposito, B., Faitsch, M., Farnik, M., Fasoli, A., Fedorczak, N., Felici, F., Feng, S., Feng, X., Ferro, G., Fevrier, O., Ficker, O., Fil, A., Fontana, M., Frassinetti, L., Furno, I., Gahle, D. S., Galassi, D., Galazka, K., Gallo, A., Galperti, C., Garavaglia, S., Garcia, J., Garcia-Munoz, M., Garrido, A. J., Garrido, I., Gath, J., Geiger, B., Giruzzi, G., Gobbin, M., Goodman, T. P., Gorini, G., Gospodarczyk, M., Granucci, G., Graves, J. P., Gruca, M., Gyergyek, T., Hakola, A., Happel, T., Harrer, G. F., Harrison, J., Havlickova, E., Hawke, J., Henderson, S., Hennequin, P., Hesslow, L., Hogeweij, D., Hogge, J. -P., Hopf, C., Hoppe, M., Horacek, J., Huang, Z., Hubbard, A., Iantchenko, A., Igochine, V., Innocente, P., Ionita Schrittwieser, C., Isliker, H., Jacquier, R., Jardin, A., Kappatou, A., Karpushov, A., Kazantzidis, P. -V., Keeling, D., Kirneva, N., Komm, M., Kong, M., Kovacic, J., Krawczyk, N., Kudlacek, O., Kurki-Suonio, T., Kwiatkowski, R., Labit, B., Lazzaro, E., Linehan, B., Lipschultz, B., Llobet, X., Lombroni, R., Loschiavo, V. P., Lunt, T., Macusova, E., Madsen, J., Maljaars, E., Mantica, P., Maraschek, M., Marchetto, C., Marco, A., Mariani, A., Marini, C., Martin, Y., Matos, F., Maurizio, R., Mavkov, B., Mazon, D., Mccarthy, P., Mcdermott, R., Menkovski, V., Merle, A., Meyer, H., Micheletti, D., Militello, F., Mitosinkova, K., Mlynar, J., Moiseenko, V., Molina Cabrera, P. A., Morales, J., Moret, J. -M., Moro, A., Mumgaard, R. T., Naulin, V., Nem, R. D., Nespoli, F., Nielsen, A. H., Nielsen, S. K., Nocente, M., Nowak, S., Offeddu, N., Orsitto, F. P., Paccagnella, R., Palha, A., Papp, G., Pau, A., Pavlichenko, R. O., Perek, A., Pericoli Ridolfini, V., Pesamosca, F., Piergotti, V., Pigatto, L., Piovesan, P., Piron, C., Plyusnin, V., Poli, E., Porte, L., Pucella, G., Puiatti, M. E., Putterich, T., Rabinski, M., Juul Rasmussen, J., Ravensbergen, T., Reich, M., Reimerdes, H., Reimold, F., Reux, C., Ricci, D., Ricci, P., Rispoli, N., Rosato, J., Saarelma, S., Salewski, M., Salmi, A., Sauter, O., Scheffer, M., Schlatter, C., Schneider, B. S., Schrittwieser, R., Sharapov, S., Sheeba, R. R., Sheikh, U., Shousha, R., Silva, M., Sinha, J., Sozzi, C., Spolaore, M., Stipani, L., Strand, P., Tala, T., Tema Biwole, A. S., Teplukhina, A. A., Testa, D., Theiler, C., Thornton, A., Tomaz, G., Tomes, M., Tran, M. Q., Tsironis, C., Tsui, C. K., Urban, J., Valisa, M., Vallar, M., Van Vugt, D., Vartanian, S., Vasilovici, O., Verhaegh, K., Vermare, L., Vianello, N., Viezzer, E., Vijvers, W. A. J., Villone, F., Voitsekhovitch, I., Vu, N. M. T., Walkden, N., Wauters, T., Weiland, M., Weisen, H., Wensing, M., Wiesenberger, M., Wilkie, G., Wischmeier, M., Wu, K., Yoshida, M., Zagorski, R., Zanca, P., Zebrowski, J., Zisis, A., Zuin, M., Coda, S. et al, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear., Universidad de Sevilla, Departamento de Ingeniería Mecánica y Fabricación, Universidad de Sevilla. TEP111: Ingeniería Mecánica, Universidad de Sevilla. RNM138: Física Nuclear Aplicada, EUROfusion MST1 Team, Control Systems Technology, Data Mining, Science and Technology of Nuclear Fusion, and Magneto-Hydro-Dynamic Stability of Fusion Plasmas

Subjects
Nuclear and High Energy Physics, Tokamak, Settore ING-INF/04, TK, UPGRADE, Cyclotron, Overview, Cyclotron resonance, overview, CONFINEMENT, DETACHMENT, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, law.invention, law, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], CONTROL-SYSTEM, 0103 physical sciences, EUROfusion, 010306 general physics, tokamak, QC, plasma, nuclear fusion, Physics, PLASMA, Divertor, Magnetic confinement fusion, Plasma, Mechanics, TCV, MST1, Condensed Matter Physics, Neutral beam injection, Physics and Astronomy, 13. Climate action, confinement, detachment, Nuclear fusion, control-system, upgrade, TCV, MST1, Beam (structure), Tokamaks
Abstract

The research program of the TCV tokamak ranges from conventional to advanced-tokamak scenarios and alternative divertor configurations, to exploratory plasmas driven by theoretical insight, exploiting the device's unique shaping capabilities. Disruption avoidance by real-time locked mode prevention or unlocking with electron-cyclotron resonance heating (ECRH) was thoroughly documented, using magnetic and radiation triggers. Runaway generation with high-Z noble-gas injection and runaway dissipation by subsequent Ne or Ar injection were studied for model validation. The new 1 MW neutral beam injector has expanded the parameter range, now encompassing ELMy H-modes in an ITER-like shape and nearly non-inductive H-mode discharges sustained by electron cyclotron and neutral beam current drive. In the H-mode, the pedestal pressure increases modestly with nitrogen seeding while fueling moves the density pedestal outwards, but the plasma stored energy is largely uncorrelated to either seeding or fueling. High fueling at high triangularity is key to accessing the attractive small edge-localized mode (type-II) regime. Turbulence is reduced in the core at negative triangularity, consistent with increased confinement and in accord with global gyrokinetic simulations. The geodesic acoustic mode, possibly coupled with avalanche events, has been linked with particle flow to the wall in diverted plasmas. Detachment, scrape-off layer transport, and turbulence were studied in L- and H-modes in both standard and alternative configurations (snowflake, super-X, and beyond). The detachment process is caused by power 'starvation' reducing the ionization source, with volume recombination playing only a minor role. Partial detachment in the H-mode is obtained with impurity seeding and has shown little dependence on flux expansion in standard single-null geometry. In the attached L-mode phase, increasing the outer connection length reduces the in-out heat-flow asymmetry. A doublet plasma, featuring an internal X-point, was achieved successfully, and a transport barrier was observed in the mantle just outside the internal separatrix. In the near future variable-configuration baffles and possibly divertor pumping will be introduced to investigate the effect of divertor closure on exhaust and performance, and 3.5 MW ECRH and 1 MW neutral beam injection heating will be added., This work was supported in part by the Swiss National Science Foundation.

Published
2019

24. Constraints on Flavor-Diagonal Non-Standard Neutrino Interactions from Borexino Phase-II

Author

G. Korga, D. Jeschke, Z. Bagdasarian, S. Appel, E. Litvinovich, K. Fomenko, Michael Wurm, M. Gschwender, Matthias Laubenstein, B. Caccianiga, Ö. Penek, F. Calaprice, Sanjib Kumar Agarwalla, J. Thurn, L. Lukyanchenko, J. Martyn, F. Gabriele, D. Bick, Sandra Zavatarelli, G. Raikov, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, Tatsu Takeuchi, O. Zaimidoroga, E. Meroni, G. Zuzel, Cristiano Galbiati, P. Cavalcante, Gioacchino Ranucci, B. Neumair, D. Guffanti, M. Nieslony, D. Bravo, Fausto Ortica, G. Lukyanchenko, G. Testera, Tobias Lachenmaier, Marco Giammarchi, G. Bellini, A. Sotnikov, R. Tartaglia, N. Rossi, D. Semenov, Kai Zuber, Aldo Ianni, S. Kumaran, E. V. Unzhakov, Xuefeng Ding, A. Vishneva, A. Di Ludovico, Matteo Agostini, D. Franco, J. Maricic, Andrey Formozov, D. Basilico, M. Skorokhvatov, N. Pilipenko, F. von Feilitzsch, Y. Suvorov, S. Rottenanger, L. Oberauer, V. N. Muratova, Caren Hagner, M. Gromov, M. Meyer, Andrea Ianni, A. Di Giacinto, A. Razeto, G. Manuzio, I. N. Machulin, A. V. Derbin, M. Misiaszek, Marco Pallavicini, D. D'Angelo, C. Ghiano, A. Jany, L. Cappelli, L. Pietrofaccia, A. Pocar, Marcin Wójcik, V. Atroshchenko, Chen Sun, M. Redchuk, Paolo Lombardi, Lino Miramonti, V. Di Marcello, V. V. Kobychev, E. Hungerford, I. Drachnev, F. Cavanna, K. Altenmüller, R. B. Vogelaar, Alessandra Re, A. Caminata, V. Orekhov, S. Marcocci, G. Bonfini, J. Benziger, K. Choi, S. Davini, Aldo Romani, L. Papp, L. Di Noto, Oleg Smirnov, Stefan Schönert, Agarwalla, S. K., Agostini, M., Altenmuller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Cappelli, L., Cavalcante, P., Cavanna, F., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Di Giacinto, A., Di Marcello, V., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Hungerford, E., Ianni, A., Jany, A., Jeschke, D., Kumaran, S., Kobychev, V., Korga, G., Lachenmaier, T., Laubenstein, M., Litvinovich, E., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Maricic, J., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Nieslony, M., Oberauer, L., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, O., Pietrofaccia, L., Pilipenko, N., Pocar, A., Raikov, G., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Rossi, N., Rottenanger, S., Schonert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sun, C., Suvorov, Y., Takeuchi, T., Tartaglia, R., Testera, G., Thurn, J., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., Agarwalla, S, Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Cappelli, L, Cavalcante, P, Cavanna, F, Chepurnov, A, Choi, K, D'Angelo, D, Davini, S, Derbin, A, Di Giacinto, A, Di Marcello, V, Ding, X, Di Ludovico, A, Di Noto, L, Drachnev, I, Fomenko, K, Formozov, A, Franco, D, Gabriele, F, Galbiati, C, Gschwender, M, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kumaran, S, Kobychev, V, Korga, G, Lachenmaier, T, Laubenstein, M, Litvinovich, E, Lombardi, P, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Maricic, J, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Nieslony, M, Oberauer, L, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pietrofaccia, L, Pilipenko, N, Pocar, A, Raikov, G, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Romani, A, Rossi, N, Rottenanger, S, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Sun, C, Suvorov, Y, Takeuchi, T, Tartaglia, R, Testera, G, Thurn, J, Unzhakov, E, Vishneva, A, Vogelaar, R, von Feilitzsch, F, Wojcik, M, Wurm, M, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Borexino, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Physics

Subjects
Physics - Instrumentation and Detectors, neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, Physics beyond the Standard Model, Electron, metal: solar, 01 natural sciences, neutrino: flux, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), solar [model], elastic scattering [neutrino electron], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], neutrino/e: coupling, detector [neutrino], Borexino, Physics, Elastic scattering, interaction [neutrino/tau], new physics, Beyond Standard Model, Neutrino Physics, Instrumentation and Detectors (physics.ins-det), neutrino electron: elastic scattering, coupling [neutrino/e], nuclear reactor [antineutrino], High Energy Physics - Phenomenology, neutrino: detector, Astrophysics - Solar and Stellar Astrophysics, coupling [neutrino], solar [neutrino], Neutrino, precision measurement [Weinberg angle], model: solar, Nuclear and High Energy Physics, Particle physics, sensitivity [detector], FOS: Physical sciences, neutrino/tau: interaction, neutral current: coupling, Weinberg angle: precision measurement, neutrino: new interaction, neutrino: spectrum, 0103 physical sciences, antineutrino: nuclear reactor, neutrino: coupling, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, ddc:530, 010306 general physics, Solar and Stellar Astrophysics (astro-ph.SR), Standard solar model, chiral [coupling], Neutral current, 010308 nuclear & particles physics, solar [metal], High Energy Physics::Phenomenology, coupling [neutral current], spectrum [neutrino], flux [neutrino], coupling: chiral, detector: sensitivity, new interaction [neutrino], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], lcsh:QC770-798, High Energy Physics::Experiment, Neutrino Physic
Abstract

The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-$\nu_{e}$ survival probability $P_{ee}(E)$, and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI's) which modify the chiral couplings and $P_{ee}(E)$. In this paper, we search for such NSI's, in particular, flavor-diagonal neutral current interactions that modify the $\nu_e e$ and $\nu_\tau e$ couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high- and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI's are placed. In addition, with the same dataset the value of $\sin^2\theta_W$ is obtained with a precision comparable to that achieved in reactor antineutrino experiments., Comment: 28 pages, 7 figures. Slight modifications in the title, abstract, and conclusion. Few references added. Text expanded for clarity. Accepted in JHEP

Published
2019
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25. Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

Author

V. Piergotti, F. Pesamosca, Bogdan Hnat, A. Sperduti, A. Krivska, J. Vicente, Panagiotis Tolias, Emanuele Poli, Matthias Hoelzl, Benedikt Geiger, A. Jardin, J. Ayllon-Guerola, G. Apruzzese, T. Lunt, J. Galdon-Quiroga, Riccardo Maggiora, M. Tardocchi, M. Koubiti, T. Jonsson, Bruce Lipschultz, P. Innocente, A. Gude, I Miron, M. G. Dunne, G. F. Harrer, A. Moro, A. Iantchenko, K. Galazka, P. Poloskei, K. Bogar, Roberto Ambrosino, G. Ferr, Vladimir E. Moiseenko, Istvan Cziegler, L. Guimarais, S. Vartanian, B. Erds, G. Pucella, V. Bobkov, James Buchanan, Raffaele Albanese, Harry M. Meyer, D. Boeyaert, G. F. Matthews, Eva Macusova, V. S. Marchenko, R. Zagórski, J. Buermans, A. Fil, W. Zhang, Giuseppe Gorini, B. Tal, D. Zaloga, Hugo Bufferand, A. Romano, L. Colas, J. Zebrowski, M. Weiland, L. Barrera-Orte, Matjaž Panjan, A.J. Thornton, E. Wolfrum, Miglena Dimitrova, R. M. McDermott, R. Lombroni, O. Tudisco, F. Reimold, E. R. Solano, X. Feng, Petra Bilkova, M. Groth, E. Alessi, D. S. Gahle, Olivier Février, I. Voitsekhovitch, Matthew Carr, A. Bock, O. Vasilovici, C. Ham, Lorenzo Figini, Guglielmo Rubinacci, Peter Lang, Pierre Manas, S. Costea, A. Kirk, F. Causa, J. Adamek, Vu N. M. T., M. Cavedon, O. Grover, Geert Verdoolaege, M. Spolaore, L. Sanchis-Sanchez, P. Bohm, P. V. Kazantzidis, Sarah Newton, M. Tomes, M.-L. Mayoral, J. R. Harrison, C. Mazzotta, H. Reimerdes, Jorge Morales, D. Brunetti, J. Gonzalez-Martin, Tomas Markovic, S. S. Henderson, D. Ricci, J. Juul Rasmussen, F. Janky, S. Saarelma, Z. Popovic, C. Tsironis, J. J. Rasmussen, S. K. Hansen, Sandra C. Chapman, Volker Naulin, H. Arnichand, Roberto Paccagnella, M. Faitsch, Anders Nielsen, M. Kong, V. Igochine, C. Piron, C. Bowman, Jorge Ferreira, D. Sytnykov, K. G. McClements, Olivier Sauter, Ondrej Ficker, Matthias Wiesenberger, T. Ravensbergen, C. Reux, Irena Ivanova-Stanik, Dirk Reiser, M. Bernert, M. Vallar, J-M Moret, M. Gruca, D. I. Refy, P. Cano Megias, Benoit Labit, M. Schubert, Giuliana Sias, O. Bogar, P. J. Mc Carthy, I. Faust, Gergely Papp, F. Matos, J. Garcia, C. Marini, E. L. Sorokovoy, Dimitri Voltolina, George Wilkie, J. M. Santos, R. R. Sheeba, Vladimir Weinzettl, Sergei Kasilov, J. Cerovsky, Matteo Agostini, G. Tardini, Laurie Porte, F. Dolizy, L. Gil, Matthias Komm, A. Dal Molin, B. Sieglin, Roch Kwiatkowski, M. C. C Messmer, Toke Koldborg Jensen, Vinodh Bandaru, Ben F. McMillan, Alessandra Fanni, Daniele Carnevale, Shimpei Futatani, D. P. Coster, V. Korovin, S. E. Sharapov, Patrik Ollus, J. Gath, A. Czarnecka, D. Gallart, M. Peterka, P. Vallejos Olivares, Jernej Kovacic, Nicolas Fedorczak, Silvio Ceccuzzi, L. Piron, J. Rosato, G. Kocsis, Stefan Kragh Nielsen, M. Garcia-Mu oz, Radomir Panek, S. F. Smith, Paolo Bettini, A. Mariani, R. Dejarnac, Lorenzo Frassinetti, D. Douai, L. Garzotti, H. J. Sun, C.K. Tsui, N. den Harder, John Elmerdahl Olsen, F. Bombarda, M. Francesco, Piero Martin, D. Hogeweij, P. Blanchard, F. Bouquey, Gabor Por, Luca Boncagni, Carlo Sozzi, Martin Hron, P. A. Schneider, V. P. Loschiavo, David Terranova, D. Aguiam, D. Choi, M. Gobbin, D. Iglesias, M. Reich, G. Avdeeva, A. Gallo, O. Biletskyi, M. Aradi, F. Liu, M. Griener, Antti Snicker, L. Kripner, Jérôme Bucalossi, L. Hesslow, Nick Walkden, M. Rodriguez-Ramos, T. C. Blanken, Cristian Galperti, F. Jaulmes, G. Calabr, G.A. Rattá, W. Bin, S. Garavaglia, V. Plyusnin, Andreas Frank Martitsch, A. Zisis, Rita Lorenzini, Duccio Testa, M. Passeri, Ola Embréus, N. Krawczyk, K. Särkimäki, Davide Galassi, D. Samaddar, M. Oberkofler, E. Seliunin, D. Brida, P. Buratti, F. Nabais, J. Ongena, J. Likonen, Yann Camenen, M. J. Mantsinen, F. Carpanese, S. Wiesen, P. Piovesan, Mirko Salewski, J. Hawke, Florian Laggner, R. Bilato, M. Wischmeier, L. Pigatto, G. I. Pokol, G. Giruzzi, Jens Madsen, D. Gadariya, L. Stipani, Christian Theiler, J. Stober, Michael Barnes, Timothy Goodman, R. D. Nem, J. J. Dominguez-Palacios Duran, F. Militello, Y. Kulyk, D. J. Cruz Zabala, A. Drenik, P. Manz, M. Scheffer, V. Pericoli Radolfini, B. Tilia, John Omotani, B. Vanovac, B. S. Schneider, E. Fable, Jakub Urban, T. Gyergyek, A. N. Karpushov, M. Farnik, Jakub Seidl, Christopher G. Albert, Antoine Merle, A. Cathey, D. A. Ryan, Sergio Galeani, R. Scannell, A. Havranek, G. de Carolis, C. Soria-Hoyo, S. Gibson, D. Carralero, D. Meshcheriakov, Morten Stejner, B. P. Duval, Francesco Cordella, Mitja Kelemen, Svetlana V. Ratynskaia, Stefano Coda, L. Calacci, C. Cianfarani, Faa Federico Felici, A. C. A. Figueiredo, L. Panaccione, E. Viezzer, Fabio Villone, Daniele Milanesio, Winfried Kernbichler, Mario Sassano, A. Teplukhina, S. Zoletnik, L. Laguardia, P. Molina Cabrera, Taina Kurki-Suonio, D. Micheletti, P. Zanca, Daniel Dunai, S. Feng, J. Decker, Stylianos Varoutis, Lorella Carraro, M. Wensing, Gustavo Granucci, Artur Palha, A. Kappatou, J. Garcia-Lopez, Felix I. Parra, Ye. O. Kazakov, S. Brezinsek, Didier Mazon, A. Lahtinen, I. Paradela Perez, P. Chmielewski, L. Giacomelli, Alessandro Pau, Gianluca Spizzo, R. Delogu, R. J. Akers, H. De Oliveira, Petr Vondracek, F. P. Orsitto, J. Hobirk, L. Xiang, A. Burckhart, B. Maljaars, V. Petrzilka, Ocleto D'Arcangelo, P. David, D. Grekov, Tamás Szepesi, Y. Andr be, P. Hacek, M. Toscano-Jimenez, T. Pütterich, L. Cordaro, V. Nikolaeva, F. Orain, M. Rabinski, C. Ionita-Schrittwieser, T. Tala, Maria Ester Puiatti, A. Casolari, T. Happel, Pär Strand, Benjamin Daniel Dudson, P. Mantica, Z. Huang, D. Colette, G. Ciraolo, Jan Mlynar, W. Suttrop, C. Meineri, J. Horacek, Seppo Sipilä, M. Gospodarczyk, S. Mastrostefano, Jesús Vega, Antti Hakola, Kevin Verhaegh, Roman Schrittwieser, C. Marchetto, M. Willensdorfer, Jari Varje, D. C. van Vugt, J. Faustin, Mathias Hoppe, M. Dreval, A. Perek, C. Angioni, Laure Vermare, U. A. Sheikh, J. F. Rivero-Rodriguez, G. Rubino, S.N. Reznik, Tsv K Popov, S. Nowak, A. S. Jacobsen, J. R. Martin Solis, David Moulton, Heinz Isliker, K. Wu, Anna Salmi, F. Nespoli, S. Elmore, O. Kudlacek, A. Kallenbach, Rok Zaplotnik, D. L. Keeling, L. Giannone, M. Maraschek, Carlos B. da Silva, F. Hitzler, M. Valovic, M. W. Jakubowski, L. Gabellieri, Jozef Varju, Marco Cecconello, M. Valisa, Vlado Menkovski, Gábor Cseh, E. Thoren, T. Eich, R. Coelho, F. Bagnato, Matteo Zuin, Alexander Kendl, G. Rocchi, G. Pautasso, D. Naydenkova, R. O. Pavlichenko, M. Fontana, Lionello Marrelli, Tommaso Bolzonella, Nicola Vianello, Pascale Hennequin, R. Ochoukov, Tom Wauters, Christian Hopf, Ch. Fuchs, E. Giovannozzi, Fulvio Auriemma, Roberto Maurizio, Stefan Buller, Massimo Nocente, K. Krieger, G. Grenfell, N. Rispoli, R. Dux, Barbara Cannas, Laboratoire de Physique des Plasmas (LPP), Université Paris-Saclay-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École polytechnique (X)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Labit, B., Eich, T., Harrer, G. F., Wolfrum, E., Bernert, M., Dunne, M. G., Frassinetti, L., Hennequin, P., Maurizio, R., Merle, A., Meyer, H., Saarelma, S., Sheikh, U., Adamek, J., Agostini, M., Aguiam, D., Akers, R., Albanese, R., Albert, C., Alessi, E., Ambrosino, R., Andr be, Y., Angioni, C., Apruzzese, G., Aradi, M., Arnichand, H., Auriemma, F., Avdeeva, G., Ayllon-Guerola, J. M., Bagnato, F., Bandaru, V. K., Barnes, M., Barrera-Orte, L., Bettini, P., Bilato, R., Biletskyi, O., Bilkova, P., Bin, W., Blanchard, P., Blanken, T., Bobkov, V., Bock, A., Boeyaert, D., Bogar, K., Bogar, O., Bohm, P., Bolzonella, T., Bombarda, F., Boncagni, L., Bouquey, F., Bowman, C., Brezinsek, S., Brida, D., Brunetti, D., Bucalossi, J., Buchanan, J., Buermans, J., Bufferand, H., Buller, S., Buratti, P., Burckhart, A., Calabr, G., Calacci, L., Camenen, Y., Cannas, B., Cano Megias, P., Carnevale, D., Carpanese, F., Carr, M., Carralero, D., Carraro, L., Casolari, A., Cathey, A., Causa, F., Cavedon, M., Cecconello, M., Ceccuzzi, S., Cerovsky, J., Chapman, S., Chmielewski, P., Choi, D., Cianfarani, C., Ciraolo, G., Coda, S., Coelho, R., Colas, L., Colette, D., Cordaro, L., Cordella, F., Costea, S., Coster, D., Cruz Zabala, D. J., Cseh, G., Czarnecka, A., Cziegler, I., D'Arcangelo, O., Dal Molin, A., David, P., De Carolis, G., De Oliveira, H., Decker, J., Dejarnac, R., Delogu, R., Den Harder, N., Dimitrova, M., Dolizy, F., Dominguez-Palacios Duran, J. J., Douai, D., Drenik, A., Dreval, M., Dudson, B., Dunai, D., Duval, B. P., Dux, R., Elmore, S., Embreus, O., Erds, B., Fable, E., Faitsch, M., Fanni, A., Farnik, M., Faust, I., Faustin, J., Fedorczak, N., Felici, F., Feng, S., Feng, X., Ferreira, J., Ferr, G., Fevrier, O., Ficker, O., Figini, L., Figueiredo, A., Fil, A., Fontana, M., Francesco, M., Fuchs, C., Futatani, S., Gabellieri, L., Gadariya, D., Gahle, D., Galassi, D., Galazka, K., Galdon-Quiroga, J., Galeani, S., Gallart, D., Gallo, A., Galperti, C., Garavaglia, S., Garcia, J., Garcia-Lopez, J., Garcia-Mu oz, M., Garzotti, L., Gath, J., Geiger, B., Giacomelli, L., Giannone, L., Gibson, S., Gil, L., Giovannozzi, E., Giruzzi, G., Gobbin, M., Gonzalez-Martin, J., Goodman, T. P., Gorini, G., Gospodarczyk, M., Granucci, G., Grekov, D., Grenfell, G., Griener, M., Groth, M., Grover, O., Gruca, M., Gude, A., Guimarais, L., Gyergyek, T., Hacek, P., Hakola, A., Ham, C., Happel, T., Harrison, J., Havranek, A., Hawke, J., Henderson, S., Hesslow, L., Hitzler, F., Hnat, B., Hobirk, J., Hoelzl, M., Hogeweij, D., Hopf, C., Hoppe, M., Horacek, J., Hron, M., Huang, Z., Iantchenko, A., Iglesias, D., Igochine, V., Innocente, P., Ionita-Schrittwieser, C., Isliker, H., Ivanova-Stanik, I., Jacobsen, A., Jakubowski, M., Janky, F., Jardin, A., Jaulmes, F., Jensen, T., Jonsson, T., Kallenbach, A., Kappatou, A., Karpushov, A., Kasilov, S., Kazakov, Y., Kazantzidis, P. V., Keeling, D., Kelemen, M., Kendl, A., Kernbichler, W., Kirk, A., Kocsis, G., Komm, M., Kong, M., Korovin, V., Koubiti, M., Kovacic, J., Krawczyk, N., Krieger, K., Kripner, L., Krivska, A., Kudlacek, O., Kulyk, Y., Kurki-Suonio, T., Kwiatkowski, R., Laggner, F., Laguardia, L., Lahtinen, A., Lang, P., Likonen, J., Lipschultz, B., Liu, F., Lombroni, R., Lorenzini, R., Loschiavo, V. P., Lunt, T., Macusova, E., Madsen, J., Maggiora, R., Maljaars, B., Manas, P., Mantica, P., Mantsinen, M. J., Manz, P., Maraschek, M., Marchenko, V., Marchetto, C., Mariani, A., Marini, C., Markovic, T., Marrelli, L., Martin, P., Martin Solis, J. R., Martitsch, A., Mastrostefano, S., Matos, F., Matthews, G., Mayoral, M. -L., Mazon, D., Mazzotta, C., Mc Carthy, P., Mcclements, K., Mcdermott, R., Mcmillan, B., Meineri, C., Menkovski, V., Meshcheriakov, D., Messmer, M., Micheletti, D., Milanesio, D., Militello, F., Miron, I. G., Mlynar, J., Moiseenko, V., Molina Cabrera, P. A., Morales, J., Moret, J. -M., Moro, A., Moulton, D., Nabais, F., Naulin, V., Naydenkova, D., Nem, R. D., Nespoli, F., Newton, S., Nielsen, A. H., Nielsen, S. K., Nikolaeva, V., Nocente, M., Nowak, S., Oberkofler, M., Ochoukov, R., Ollus, P., Olsen, J., Omotani, J., Ongena, J., Orain, F., Orsitto, F. P., Paccagnella, R., Palha, A., Panaccione, L., Panek, R., Panjan, M., Papp, G., Paradela Perez, I., Parra, F., Passeri, M., Pau, A., Pautasso, G., Pavlichenko, R., Perek, A., Pericoli Radolfini, V., Pesamosca, F., Peterka, M., Petrzilka, V., Piergotti, V., Pigatto, L., Piovesan, P., Piron, C., Piron, L., Plyusnin, V., Pokol, G., Poli, E., Poloskei, P., Popov, T., Popovic, Z., Por, G., Porte, L., Pucella, G., Puiatti, M. E., Putterich, T., Rabinski, M., Juul Rasmussen, J., Rasmussen, J., Ratta, G. A., Ratynskaia, S., Ravensbergen, T., Refy, D., Reich, M., Reimerdes, H., Reimold, F., Reiser, D., Reux, C., Reznik, S., Ricci, D., Rispoli, N., Rivero-Rodriguez, J. F., Rocchi, G., Rodriguez-Ramos, M., Romano, A., Rosato, J., Rubinacci, G., Rubino, G., Ryan, D. A., Salewski, M., Salmi, A., Samaddar, D., Sanchis-Sanchez, L., Santos, J., Sarkimaki, K., Sassano, M., Sauter, O., Scannell, R., Scheffer, M., Schneider, B. S., Schneider, P., Schrittwieser, R., Schubert, M., Seidl, J., Seliunin, E., Sharapov, S., Sheeba, R. R., Sias, G., Sieglin, B., Silva, C., Sipila, S., Smith, S., Snicker, A., Solano, E. R., Hansen, S. K., Soria-Hoyo, C., Sorokovoy, E., Sozzi, C., Sperduti, A., Spizzo, G., Spolaore, M., Stejner, M., Stipani, L., Stober, J., Strand, P., Sun, H., Suttrop, W., Sytnykov, D., Szepesi, T., Tal, B., Tala, T., Tardini, G., Tardocchi, M., Teplukhina, A., Terranova, D., Testa, D., Theiler, C., Thoren, E., Thornton, A., Tilia, B., Tolias, P., Tomes, M., Toscano-Jimenez, M., Tsironis, C., Tsui, C., Tudisco, O., Urban, J., Valisa, M., Vallar, M., Vallejos Olivares, P., Valovic, M., Van Vugt, D., Vanovac, B., Varje, J., Varju, J., Varoutis, S., Vartanian, S., Vasilovici, O., Vega, J., Verdoolaege, G., Verhaegh, K., Vermare, L., Vianello, N., Vicente, J., Viezzer, E., Villone, F., Voitsekhovitch, I., Voltolina, D., Vondracek, P., Vu, N. M. T., Walkden, N., Wauters, T., Weiland, M., Weinzettl, V., Wensing, M., Wiesen, S., Wiesenberger, M., Wilkie, G., Willensdorfer, M., Wischmeier, M., Wu, K., Xiang, L., Zagorski, R., Zaloga, D., Zanca, P., Zaplotnik, R., Zebrowski, J., Zhang, W., Zisis, A., Zoletnik, S., Zuin, M., Swiss Federal Institute of Technology Lausanne, Max-Planck-Institut für Plasmaphysik, Vienna University of Technology, KTH Royal Institute of Technology, Université Paris-Saclay, JET, Czech Academy of Sciences, National Research Council of Italy, University of Lisbon, University of Naples Federico II, Graz University of Technology, University of Naples Parthenope, Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile, Danmarks Tekniske Universitet, University of Seville, University of Oxford, EUROfusion Programme Management Unit, National Science Center Kharkov Institute of Physics and Technology, Eindhoven University of Technology, Forschungszentrum Jülich, CEA, University of York, Royal Military Academy, Chalmers University of Technology, Tuscia University, Università di Roma Tor Vergata, CNRS, University of Cagliari, CIEMAT, Uppsala University, University of Warwick, Soltan Institute for Nuclear Studies, University of Innsbruck, Hungarian Academy of Sciences, Budapest University of Technology and Economics, Durham University, BarcelonaTech, University of Strathclyde, Barcelona Supercomputing Center, University of Milan - Bicocca, Karlsruhe Institute of Technology, Fusion and Plasma Physics, J. Stefan Institute, VTT Technical Research Centre of Finland, Dutch Institute for Fundamental Energy Research, Aristotle University of Thessaloniki, National Technical University of Athens, National Centre for Nuclear Research, University of Helsinki, Université Côte d'Azur, Polytechnic University of Turin, NASU - Institute of Nuclear Research, University of Cassino and Southern Lazio, University College Cork, National Institute for Laser, Plasma and Radiation Physics, Department of Applied Physics, Sofia University St. Kliment Ohridski, Ghent University, Aalto-yliopisto, Aalto University, Labit, B, Eich, T, Harrer, G, Wolfrum, E, Bernert, M, Dunne, M, Frassinetti, L, Hennequin, P, Maurizio, R, Merle, A, Meyer, H, Saarelma, S, Sheikh, U, Adamek, J, Agostini, M, Aguiam, D, Akers, R, Albanese, R, Albert, C, Alessi, E, Ambrosino, R, Andr be, Y, Angioni, C, Apruzzese, G, Aradi, M, Arnichand, H, Auriemma, F, Avdeeva, G, Ayllon-Guerola, J, Bagnato, F, Bandaru, V, Barnes, M, Barrera-Orte, L, Bettini, P, Bilato, R, Biletskyi, O, Bilkova, P, Bin, W, Blanchard, P, Blanken, T, Bobkov, V, Bock, A, Boeyaert, D, Bogar, K, Bogar, O, Bohm, P, Bolzonella, T, Bombarda, F, Boncagni, L, Bouquey, F, Bowman, C, Brezinsek, S, Brida, D, Brunetti, D, Bucalossi, J, Buchanan, J, Buermans, J, Bufferand, H, Buller, S, Buratti, P, Burckhart, A, Calabr, G, Calacci, L, Camenen, Y, Cannas, B, Cano Megias, P, Carnevale, D, Carpanese, F, Carr, M, Carralero, D, Carraro, L, Casolari, A, Cathey, A, Causa, F, Cavedon, M, Cecconello, M, Ceccuzzi, S, Cerovsky, J, Chapman, S, Chmielewski, P, Choi, D, Cianfarani, C, Ciraolo, G, Coda, S, Coelho, R, Colas, L, Colette, D, Cordaro, L, Cordella, F, Costea, S, Coster, D, Cruz Zabala, D, Cseh, G, Czarnecka, A, Cziegler, I, D'Arcangelo, O, Dal Molin, A, David, P, De Carolis, G, De Oliveira, H, Decker, J, Dejarnac, R, Delogu, R, Den Harder, N, Dimitrova, M, Dolizy, F, Dominguez-Palacios Duran, J, Douai, D, Drenik, A, Dreval, M, Dudson, B, Dunai, D, Duval, B, Dux, R, Elmore, S, Embreus, O, Erds, B, Fable, E, Faitsch, M, Fanni, A, Farnik, M, Faust, I, Faustin, J, Fedorczak, N, Felici, F, Feng, S, Feng, X, Ferreira, J, Ferr, G, Fevrier, O, Ficker, O, Figini, L, Figueiredo, A, Fil, A, Fontana, M, Francesco, M, Fuchs, C, Futatani, S, Gabellieri, L, Gadariya, D, Gahle, D, Galassi, D, Galazka, K, Galdon-Quiroga, J, Galeani, S, Gallart, D, Gallo, A, Galperti, C, Garavaglia, S, Garcia, J, Garcia-Lopez, J, Garcia-Mu oz, M, Garzotti, L, Gath, J, Geiger, B, Giacomelli, L, Giannone, L, Gibson, S, Gil, L, Giovannozzi, E, Giruzzi, G, Gobbin, M, Gonzalez-Martin, J, Goodman, T, Gorini, G, Gospodarczyk, M, Granucci, G, Grekov, D, Grenfell, G, Griener, M, Groth, M, Grover, O, Gruca, M, Gude, A, Guimarais, L, Gyergyek, T, Hacek, P, Hakola, A, Ham, C, Happel, T, Harrison, J, Havranek, A, Hawke, J, Henderson, S, Hesslow, L, Hitzler, F, Hnat, B, Hobirk, J, Hoelzl, M, Hogeweij, D, Hopf, C, Hoppe, M, Horacek, J, Hron, M, Huang, Z, Iantchenko, A, Iglesias, D, Igochine, V, Innocente, P, Ionita-Schrittwieser, C, Isliker, H, Ivanova-Stanik, I, Jacobsen, A, Jakubowski, M, Janky, F, Jardin, A, Jaulmes, F, Jensen, T, Jonsson, T, Kallenbach, A, Kappatou, A, Karpushov, A, Kasilov, S, Kazakov, Y, Kazantzidis, P, Keeling, D, Kelemen, M, Kendl, A, Kernbichler, W, Kirk, A, Kocsis, G, Komm, M, Kong, M, Korovin, V, Koubiti, M, Kovacic, J, Krawczyk, N, Krieger, K, Kripner, L, Krivska, A, Kudlacek, O, Kulyk, Y, Kurki-Suonio, T, Kwiatkowski, R, Laggner, F, Laguardia, L, Lahtinen, A, Lang, P, Likonen, J, Lipschultz, B, Liu, F, Lombroni, R, Lorenzini, R, Loschiavo, V, Lunt, T, Macusova, E, Madsen, J, Maggiora, R, Maljaars, B, Manas, P, Mantica, P, Mantsinen, M, Manz, P, Maraschek, M, Marchenko, V, Marchetto, C, Mariani, A, Marini, C, Markovic, T, Marrelli, L, Martin, P, Martin Solis, J, Martitsch, A, Mastrostefano, S, Matos, F, Matthews, G, Mayoral, M, Mazon, D, Mazzotta, C, Mc Carthy, P, Mcclements, K, Mcdermott, R, Mcmillan, B, Meineri, C, Menkovski, V, Meshcheriakov, D, Messmer, M, Micheletti, D, Milanesio, D, Militello, F, Miron, I, Mlynar, J, Moiseenko, V, Molina Cabrera, P, Morales, J, Moret, J, Moro, A, Moulton, D, Nabais, F, Naulin, V, Naydenkova, D, Nem, R, Nespoli, F, Newton, S, Nielsen, A, Nielsen, S, Nikolaeva, V, Nocente, M, Nowak, S, Oberkofler, M, Ochoukov, R, Ollus, P, Olsen, J, Omotani, J, Ongena, J, Orain, F, Orsitto, F, Paccagnella, R, Palha, A, Panaccione, L, Panek, R, Panjan, M, Papp, G, Paradela Perez, I, Parra, F, Passeri, M, Pau, A, Pautasso, G, Pavlichenko, R, Perek, A, Pericoli Radolfini, V, Pesamosca, F, Peterka, M, Petrzilka, V, Piergotti, V, Pigatto, L, Piovesan, P, Piron, C, Piron, L, Plyusnin, V, Pokol, G, Poli, E, Poloskei, P, Popov, T, Popovic, Z, Por, G, Porte, L, Pucella, G, Puiatti, M, Putterich, T, Rabinski, M, Juul Rasmussen, J, Rasmussen, J, Ratta, G, Ratynskaia, S, Ravensbergen, T, Refy, D, Reich, M, Reimerdes, H, Reimold, F, Reiser, D, Reux, C, Reznik, S, Ricci, D, Rispoli, N, Rivero-Rodriguez, J, Rocchi, G, Rodriguez-Ramos, M, Romano, A, Rosato, J, Rubinacci, G, Rubino, G, Ryan, D, Salewski, M, Salmi, A, Samaddar, D, Sanchis-Sanchez, L, Santos, J, Sarkimaki, K, Sassano, M, Sauter, O, Scannell, R, Scheffer, M, Schneider, B, Schneider, P, Schrittwieser, R, Schubert, M, Seidl, J, Seliunin, E, Sharapov, S, Sheeba, R, Sias, G, Sieglin, B, Silva, C, Sipila, S, Smith, S, Snicker, A, Solano, E, Hansen, S, Soria-Hoyo, C, Sorokovoy, E, Sozzi, C, Sperduti, A, Spizzo, G, Spolaore, M, Stejner, M, Stipani, L, Stober, J, Strand, P, Sun, H, Suttrop, W, Sytnykov, D, Szepesi, T, Tal, B, Tala, T, Tardini, G, Tardocchi, M, Teplukhina, A, Terranova, D, Testa, D, Theiler, C, Thoren, E, Thornton, A, Tilia, B, Tolias, P, Tomes, M, Toscano-Jimenez, M, Tsironis, C, Tsui, C, Tudisco, O, Urban, J, Valisa, M, Vallar, M, Vallejos Olivares, P, Valovic, M, Van Vugt, D, Vanovac, B, Varje, J, Varju, J, Varoutis, S, Vartanian, S, Vasilovici, O, Vega, J, Verdoolaege, G, Verhaegh, K, Vermare, L, Vianello, N, Vicente, J, Viezzer, E, Villone, F, Voitsekhovitch, I, Voltolina, D, Vondracek, P, Vu, N, Walkden, N, Wauters, T, Weiland, M, Weinzettl, V, Wensing, M, Wiesen, S, Wiesenberger, M, Wilkie, G, Willensdorfer, M, Wischmeier, M, Wu, K, Xiang, L, Zagorski, R, Zaloga, D, Zanca, P, Zaplotnik, R, Zebrowski, J, Zhang, W, Zisis, A, Zoletnik, S, Zuin, M, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Control Systems Technology, Science and Technology of Nuclear Fusion, Data Mining, Sensorics for fusion reactors, and Magneto-Hydro-Dynamic Stability of Fusion Plasmas

Subjects
Nuclear and High Energy Physics, Settore ING-INF/04, Work package, grassy ELM, ballooning modes, Nuclear physics, 01 natural sciences, Flattening, Ballooning, 010305 fluids & plasmas, grassy ELMs, separatrix density, ASDEX Upgrade, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], 0103 physical sciences, 010306 general physics, Edge-localized mode, QC, H-mode, plasma triangularity, type-II ELMs, Physics, Física [Àrees temàtiques de la UPC], type-II ELM, Plasma, Condensed Matter Physics, Null (physics), Shear (sheet metal), Física nuclear, Atomic physics, ballooning mode
Abstract

Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a double null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened. Peer Reviewed Article escrit per 365 autors/autores: Labit, B.; Eich, T.; Harrer, G. F.; Wolfrum, E.; Bernert, M.; Dunne, M. G.; Frassinetti, L.; Hennequin, P.; Maurizio, R.; Merle, A.; Meyer, H.; Saarelma, S.; Sheikh, U.; Adamek, J.; Agostini, M.; Aguiam, D.; Akers, R.; Albanese, R.; Albert, C.; Alessi, E.; Ambrosino, R.; Andr be, Y.; Angioni, C.; Apruzzese, G.; Aradi, M.; Arnichand, H.; Auriemma, F.; Avdeeva, G.; Ayllon-Guerola, J. M.; Bagnato, F.; Bandaru, V. K.; Barnes, M.; Barrera-Orte, L.; Bettini, P.; Bilato, R.; Biletskyi, O.; Bilkova, P.; Bin, W.; Blanchard, P.; Blanken, T.; Bobkov, V.; Bock, A.; Boeyaert, D.; Bogar, K.; Bogar, O.; Bohm, P.; Bolzonella, T.; Bombarda, F.; Boncagni, L.; Bouquey, F.; Bowman, C.; Brezinsek, S.; Brida, D.; Brunetti, D.; Bucalossi, J.; Buchanan, J.; Buermans, J.; Bufferand, H.; Buller, S.; Buratti, P.; Burckhart, A.; Calabr, G.; Calacci, L.; Camenen, Y.; Cannas, B.; Cano Megías, P.; Carnevale, D.; Carpanese, F.; Carr, M.; Carralero, D.; Carraro, L.; Casolari, A.; Cathey, A.; Causa, F.; Cavedon, M.; Cecconello, M.; Ceccuzzi, S.; Cerovsky, J.; Chapman, S.; Chmielewski, P.; Choi, D.; Cianfarani, C.; Ciraolo, G.; Coda, S.; Coelho, R.; Colas, L.; Colette, D.; Cordaro, L.; Cordella, F.; Costea, S.; Coster, D.; Cruz Zabala, D. J.; Cseh, G.; Czarnecka, A.; Cziegler, I.; D’Arcangelo, O.; Dal Molin, A.; David, P.; De Carolis, G.; De Oliveira, H.; Decker, J.; Dejarnac, R.; Delogu, R.; Den Harder, N.; Dimitrova, M.; Dolizy, F.; Domínguez-Palacios Durán, J. J.; Douai, D.; Drenik, A.; Dreval, M.; Dudson, B.; Dunai, D.; Duval, B. P.; Dux, R.; Elmore, S.; Embréus, O.; Erds, B.; Fable, E.; Faitsch, M.; Fanni, A.; Farnik, M.; Faust, I.; Faustin, J.; Fedorczak, N.; Felici, F.; Feng, S.; Feng, X.; Ferreira, J.; Ferr, G.; Février, O.; Ficker, O.; Figini, L.; Figueiredo, A.; Fil, A.; Fontana, M.; Francesco, M.; Fuchs, C.; Futatani, S.; Gabellieri, L.; Gadariya, D.; Gahle, D.; Galassi, D.; Gałązka, K.; Galdon-Quiroga, J.; Galeani, S.; Gallart, D.; Gallo, A.; Galperti, C.; Garavaglia, S.; Garcia, J.; Garcia-Lopez, J.; Garcia-Mu oz, M.; Garzotti, L.; Gath, J.; Geiger, B.; Giacomelli, L.; Giannone, L.; Gibson, S.; Gil, L.; Giovannozzi, E.; Giruzzi, G.; Gobbin, M.; Gonzalez-Martin, J.; Goodman, T. P.; Gorini, G.; Gospodarczyk, M.; Granucci, G.; Grekov, D. 1; Grenfell, G.; Griener, M.; Groth, M.; Grover, O.; Gruca, M.; Gude, A.; Guimarais, L.; Gyergyek, T.; Hacek, P.; Hakola, A.; Ham, C.; Happel, T.; Harrison, J.; Havranek, A.; Hawke, J.; Henderson, S.; Hesslow, L.; Hitzler, F.; Hnat, B.; Hobirk, J.; Hoelzl, M.; Hogeweij, D.; Hopf, C.; Hoppe, M.; Horacek, J.; Hron, M.; Huang, Z.; Iantchenko, A.; Iglesias, D.; Igochine, V.; Innocente, P.; Ionita-Schrittwieser, C.; Isliker, H.; Ivanova-Stanik, I.; Jacobsen, A.; Jakubowski, M.; Janky, F.; Jardin, A.; Jaulmes, F.; Jensen, T.; Jonsson, T.; Kallenbach, A.; Kappatou, A.; Karpushov, A.; Kasilov, S.; Kazakov, Y.; Kazantzidis, P. V.; Keeling, D.; Kelemen, M.; Kendl, A.; Kernbichler, W.; Kirk, A.; Kocsis, G.; Komm, M.; Kong, M.; Korovin, V.; Koubiti, M.; Kovacic, J.; Krawczyk, N.; Krieger, K.; Kripner, L.; Křivská, A.; Kudlacek, O.; Kulyk, Y.; Kurki-Suonio, T.; Kwiatkowski, R.; Laggner, F.; Laguardia, L.; Lahtinen, A.; Lang, P.; Likonen, J.; Lipschultz, B.; Liu, F.; Lombroni, R.; Lorenzini, R.; Loschiavo, V. P.; Lunt, T.; MacUsova, E.; Madsen, J.; Maggiora, R.; Maljaars, B.; Manas, P.; Mantica, P.; Mantsinen, M. J.; Manz, P.; Maraschek, M.; Marchenko, V.; Marchetto, C.; Mariani, A.; Marini, C.; Markovic, T.; Marrelli, L.; Martin, P.; Martín Solís, J. R.; Martitsch, A.; Mastrostefano, S.; Matos, F.; Matthews, G.; Mayoral, M.-L.; Mazon, D.; Mazzotta, C.; Mc Carthy, P.; McClements, K.; McDermott, R.; McMillan, B.; Meineri, C.; Menkovski, V.; Meshcheriakov, D.; Messmer, M.; Micheletti, D.; Milanesio, D.; Militello, F.; Miron, I. G.; Mlynar, J.; Moiseenko, V.; Molina Cabrera, P. A.; Morales, J.; Moret, J.-M.; Moro, A.; Moulton, D.; Nabais, F.; Naulin, V.; Naydenkova, D.; Nem, R. D.; Nespoli, F.; Newton, S.; Nielsen, A. H.; Nielsen, S. K.; Nikolaeva, V.; Nocente, M.; Nowak, S.; Oberkofler, M.; Ochoukov, R.; Ollus, P.; Olsen, J.; Omotani, J.; Ongena, J.; Orain, F.; Orsitto, F. P.; Paccagnella, R.; Palha, A.; Panaccione, L.; Panek, R.; Panjan, M.; Papp, G.; Paradela Perez, I.; Parra, F.; Passeri, M.; Pau, A.; Pautasso, G.; Pavlichenko, R.; Perek, A.; Pericoli Radolfini, V.; Pesamosca, F.; Peterka, M.; Petrzilka, V.; Piergotti, V.; Pigatto, L.; Piovesan, P.; Piron, C.; Piron, L.; Plyusnin, V.; Pokol, G.; Poli, E.; Pölöskei, P.; Popov, T.; Popovic, Z.; Pór, G.; Porte, L.; Pucella, G.; Puiatti, M. E.; Pütterich, T.; Rabinski, M.; Juul Rasmussen, J.; Rasmussen, J.; Rattá, G. A.; Ratynskaia, S.; Ravensbergen, T.; Réfy, D.; Reich, M.; Reimerdes, H.; Reimold, F.; Reiser, D.; Reux, C.; Reznik, S.; Ricci, D.; Rispoli, N.; Rivero-Rodriguez, J. F.; Rocchi, G.; Rodriguez-Ramos, M.; Romano, A.; Rosato, J.; Rubinacci, G.; Rubino, G.; Ryan, D. A.; Salewski, M.; Salmi, A.; Samaddar, D.; Sanchis-Sanchez, L.; Santos, J.; Särkimäki, K.; Sassano, M.; Sauter, O.; Scannell, R.; Scheffer, M.; Schneider, B. S.; Schneider, P.; Schrittwieser, R.; Schubert, M.; Seidl, J.; Seliunin, E.; Sharapov, S.; Sheeba, R. R.; Sias, G.; Sieglin, B.; Silva, C.; Sipilä, S.; Smith, S.; Snicker, A.; Solano, E. R.; Hansen, S. K.; Soria-Hoyo, C.; Sorokovoy, E.; Sozzi, C.; Sperduti, A.; Spizzo, G.; Spolaore, M.; Stejner, M.; Stipani, L.; Stober, J.; Strand, P.; Sun, H.; Suttrop, W.; Sytnykov, D.; Szepesi, T.; Tál, B.; Tala, T.; Tardini, G.; Tardocchi, M.; Teplukhina, A.; Terranova, D.; Testa, D.; Theiler, C.; Thorén, E.; Thornton, A.; Tilia, B.; Tolias, P.; Tomes, M.; Toscano-Jimenez, M.; Tsironis, C.; Tsui, C.; Tudisco, O.; Urban, J.; Valisa, M.; Vallar, M.; Vallejos Olivares, P.; Valovic, M.; Van Vugt, D.; Vanovac, B.; Varje, J.; Varju, J.; Varoutis, S. 1; Vartanian, S.; Vasilovici, O.; Vega, J.; Verdoolaege, G.; Verhaegh, K.; Vermare, L.; Vianello, N.; Vicente, J.; Viezzer, E.; Villone, F.; Voitsekhovitch, I.; Voltolina, D.; Vondracek, P.; Vu, N. M. T.; Walkden, N.; Wauters, T.; Weiland, M.; Weinzettl, V.; Wensing, M.; Wiesen, S.; Wiesenberger, M.; Wilkie, G.; Willensdorfer, M.; Wischmeier, M.; Wu, K.; Xiang, L.; Zagorski, R.; Zaloga, D.; Zanca, P.; Zaplotnik, R.; Zebrowski, J.; Zhang, W.; Zisis, A.; Zoletnik, S.; Zuin, M.

Published
2019

26. Statistical Methods Applied to the Search of Sterile Neutrinos

Author

Birgit Neumair and Matteo Agostini

Subjects
Sterile neutrino, Physics and Astronomy (miscellaneous), FOS: Physical sciences, lcsh:Astrophysics, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Frequentist inference, lcsh:QB460-466, Test statistic, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Statistical physics, Sensitivity (control systems), Nuclear Experiment (nucl-ex), Neutrino oscillation, Nuclear Experiment, Engineering (miscellaneous), Statistical hypothesis testing, Physics, ddc, High Energy Physics - Phenomenology, Physics - Data Analysis, Statistics and Probability, lcsh:QC770-798, Probability distribution, High Energy Physics::Experiment, Neutrino, Data Analysis, Statistics and Probability (physics.data-an)
Abstract

The frequentist statistical methods applied to search for short-baseline neutrino oscillations induced by a sterile neutrino with mass at the eV scale are reviewed and compared. The comparison is performed under limit setting and signal discovery scenarios, considering both when an oscillation would enhance the neutrino interaction rate in the detector and when it would reduce it. The sensitivity of the experiments and the confidence regions extracted for specific data sets change considerably according to which test statistic is used and the assumptions on its probability distribution. A standardized analysis approach based on the most general kind of hypothesis test is proposed., Comment: Replaced with the published version. 23 pages, 10 figures

Published
2019
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27. Edge turbulence approaching the density limit in RFX-mod experiment

Author

Matteo Agostini and Paolo Scarin

Subjects
Physics, Electron density, Reversed field pinch, Turbulence, high density, Imaging diagnostic, Plasma, edge turbulence, Condensed Matter Physics, 01 natural sciences, 010305 fluids & plasmas, Radial velocity, Nuclear Energy and Engineering, Physics::Plasma Physics, 0103 physical sciences, Low density, Density limit, Atomic physics, 010306 general physics, reversedfield pinch
Abstract

The boundary region of the RFX-mod reversedfield pinch experiment is strongly influenced bythe value of the electron density. With increasing density the magnetic topology in the plasmacore and in the plasma edge changes, together with the statistical properties of the edge turbulentfluctuations. Using the density normalized to the Greenwald density(n/nG), two density regimesare identified: the low density regime at n/nG0.4-0.5, without a clear threshold between them. At low density the plasma isdominated by the(m, n)=(1,-7)magnetic mode, which gives the same shape to the magneticboundary; at higher density a strong(0, 1)mode rises. When increasingn/nG, edgefluctuationsdevelop strong non-Gaussian tails, turbulent structures become larger and their radial velocitybecome measurable with the gas puff imaging diagnostic whenn/nG>0.3-0.4. Thisphenomenology is described in detail for the two density regimes of RFX-mod.

Published
2019

28. Results on geoneutrinos at Borexino

Author

Al. Ianni, G. Bonfini, Frank Calaprice, Andrey Formozov, Z. Yokley, V. Atroshchenko, J. Martyn, E. Litvinovich, R. Tartaglia, C. Galbiati, Livia Ludhova, L. Di Noto, N. Rossi, J. Thurn, A. Di Ludovico, G. Raikov, Z. Bagdasarian, Matteo Agostini, D. A. Semenov, A. S. Chepurnov, V. Orekhov, I. N. Machulin, Lothar Oberauer, F. von Feilitzsch, G. Bellini, D. Opitz, C. Ghiano, Caren Hagner, Matthias Laubenstein, A. Caminata, T. Houdy, Xuefeng Ding, M. M. Wojcik, Marco Pallavicini, F. Gabriele, A. M. Goretti, Aldo Romani, M. Carlini, Denis Korablev, P. Cavalcante, G. Manuzio, M. Misiaszek, B. Neumair, R. B. Vogelaar, G. Korga, K. Fomenko, N. Pilipenko, S. Rottenanger, L. Papp, G. Zuzel, M. S. Meyer, A. Pocar, D. Basilico, E. Meroni, E. V. Hungerford, Ö. Penek, Fausto Ortica, M. D. Skorokhvatov, Michael Wurm, J. Maricic, A. V. Derbin, S. Appel, M. Gschwender, K. Altenmüller, D. Guffanti, O. Smirnov, I. Bolognino, G. Lukyanchenko, A. Sotnikov, E. V. Unzhakov, G. Testera, Paolo Lombardi, Tobias Lachenmaier, Alessandra Re, S. Schönert, Marco Giammarchi, O. Zaimidoroga, F. Lombardi, S. Caprioli, V. V. Kobychev, V. N. Muratova, S. Marcocci, M. Toropova, L. Collica, Jay Burton Benziger, A. Jany, D. Bick, Sandra Zavatarelli, A. Porcelli, S. Weinz, Gioacchino Ranucci, Y. Suvorov, B. Caccianiga, A. Vishneva, S. Davini, L. Lukyanchenko, D. Bravo, Lino Miramonti, F. Cavanna, L.F.F. Stokes, D. Jeschke, An. Ianni, Kai Zuber, L. Pietrofaccia, M. Redchuk, D. Franco, A. Razeto, K. Choi, M. Gromov, and I. S. Drachnev

Subjects
Physics, Nuclear physics, Low energy, Physics::Instrumentation and Detectors, Solar neutrino, Detector, High Energy Physics::Experiment, Scintillator, National laboratory, Borexino, Physics::Geophysics
Abstract

The latest and more complete geo-neutrinos Borexino results, are briefly presented and discussed. Borexino is a liquid scintillator detector located at the Gran Sasso National Laboratory in Italy, whose primary purpose is the real-time spectroscopy of low energy solar neutrinos. It is the only experiment so far to have provided an evidence of geo-neutrinos existence beyond a 5σ significance level. The geo-neutrinos measurement and analysis, along with implications from the geological point of view, are shortly discussed.

Published
2018

29. Searching for neutrinoless double beta decay with GERDA

Author

S. Hemmer, V. N. Kornoukhov, Matthias Laubenstein, K. Pelczar, V. G. Egorov, K. T. Knöpfle, R. Brugnera, M. Balata, A. A. Vasenko, Guillaume Lutter, T. Wester, A. M. Bakalyarov, V. I. Lebedev, A.A. Smolnikov, A. Lazzaro, V. V. Kuzminov, Matteo Agostini, C. Wiesinger, L. Vanhoefer, Thomas Kihm, B. Schneider, Anna Julia Zsigmond, M. Shirchenko, E. Doroshkevich, Manfred Lindner, L. B. Bezrukov, Oliver Schulz, Kai Zuber, C. Macolino, L. Stanco, V. V. Kazalov, E. Shevchik, O.I. Kochetov, G. Zuzel, R. Falkenstein, H. V. Kirpichnikov, Jochen Schreiner, Alberto Pullia, A. Garfagnini, D. R. Zinatulina, O. Selivanenko, V.B. Brudanin, C. Ransom, J. Janicsko, A.-K. Schütz, Hardy Simgen, Werner Hofmann, Allen Caldwell, M. Miloradovic, V. I. Gurentsov, K. N. Gusev, A. Hegai, K. Panas, T. Bode, A. Kish, A. M. Gangapshev, Marcin Wójcik, N. Di Marco, R. Mingazheva, Christian Bauer, A. Lubashevskiy, A. Domula, R. Kneiβl, Cinzia Sada, M. Junker, J. Hakenmüller, P. Grabmayr, B. Schwingenheuer, K. von Sturm, Mikael Hult, R. Hiller, Stefano Riboldi, E. Bellotti, Bayarto Lubsandorzhiev, Stefan Schönert, C. Gooch, P. Moseev, Luciano Pandola, V. Wagner, I. Zhitnikov, I. R. Barabanov, Laura Baudis, M. Misiaszek, A. A. Klimenko, M. Heisel, N. Rumyantseva, F. Salamida, S. V. Zhukov, Alessandro Bettini, B. Cattadori, A. Kirsch, Y. Kermaïdic, V. D'Andrea, Ivano Lippi, L. V. Inzhechik, W. Maneschg, E. A. Yanovich, C. Schmitt, A. V. Veresnikova, A. Chernogorov, J. Jochum Csáthy, A. Wegmann, Igor Nemchenok, Bela Majorovits, E. V. Demidova, and S. Belogurov

Subjects
Paper, Physics, History, Particle physics, Physics - Instrumentation and Detectors, Double beta decay, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Nuclear Experiment, ddc, Computer Science Applications, Education
Abstract

The GERmanium Detector Array (GERDA) experiment located at the INFN Gran Sasso Laboratory (Italy), is looking for the neutrinoless double beta decay of Ge76, by using high-purity germanium detectors made from isotopically enriched material. The combination of the novel experimental design, the careful material selection for radio-purity and the active/passive shielding techniques result in a very low residual background at the Q-value of the decay, about 1e-3 counts/(keV kg yr). This makes GERDA the first experiment in the field to be background-free for the complete design exposure of 100 kg yr. A search for neutrinoless double beta decay was performed with a total exposure of 47.7 kg yr: 23.2 kg yr come from the second phase (Phase II) of the experiment, in which the background is reduced by about a factor of ten with respect to the previous phase. The analysis presented in this paper includes 12.4 kg yr of new Phase II data. No evidence for a possible signal is found: the lower limit for the half-life of Ge76 is 8.0e25 yr at 90% CL. The experimental median sensitivity is 5.8e25 yr. The experiment is currently taking data. As it is running in a background-free regime, its sensitivity grows linearly with exposure and it is expected to surpass 1e26 yr within 2018., 8 pages, to appear in the proceedings of TAUP2017

Published
2020

30. Solar Neutrinos Spectroscopy with Borexino Phase-II

Author

A. Di Ludovico, G. Manuzio, L. Lukyanchenko, Matthias Laubenstein, J. Maricic, S. Appel, M. Redchuk, S. Caprioli, E. Meroni, N. Pilipenko, C. Ghiano, Caren Hagner, J. Martyn, E. Litvinovich, Z. Yokley, G. Zuzel, P. Cavalcante, N. Rossi, G. Bonfini, V. Atroshchenko, B. Caccianiga, M. S. Meyer, M. Misiaszek, Frank Calaprice, Tobias Lachenmaier, Marco Giammarchi, Xuefeng Ding, D. A. Semenov, O. Smirnov, A. M. Goretti, Paolo Lombardi, A. Jany, Alessandra Re, T. Houdy, Matteo Agostini, E. V. Hungerford, S. Davini, E. V. Unzhakov, O. Zaimidoroga, V. V. Kobychev, A. Sotnikov, K. Altenmueller, R. B. Vogelaar, D. Franco, S. Weinz, I. N. Machulin, A. Vishneva, Aldo Ianni, F. Cavanna, A. Pocar, Y. Suvorov, G. Lukyanchenko, Jay Burton Benziger, G. Raikov, Z. Bagdasarian, R. Tartaglia, S. Rottenanger, M. Carlini, G. Korga, K. Fomenko, L. Papp, S. Schönert, S. Marcocci, M. Toropova, L. Collica, D. Jeschke, A. Caminata, F. Gabriele, D. Guffanti, M. D. Skorokhvatov, Denis Korablev, Andrey Formozov, Michael Wurm, A. V. Derbin, M. M. Wojcik, Andrea Ianni, D. Bick, Sandra Zavatarelli, F. von Feilitzsch, A. Porcelli, I. Bolognino, Aldo Romani, M. Gschwender, L. Di Noto, C. Galbiati, Lino Miramonti, Livia Ludhova, A. S. Chepurnov, Ö. Penek, G. Testera, J. Thurn, G. Bellini, Gioacchino Ranucci, L.F.F. Stokes, D. Bravo, D. Basilico, F. Lombardi, A. Razeto, K. Choi, M. Gromov, I. S. Drachnev, Kai Zuber, and L. Pietrofaccia

Subjects
Physics, Nuclear physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, particle_field_physics, Phase (waves), High Energy Physics::Experiment, Neutrino oscillation, Spectroscopy, Borexino
Abstract

Solar neutrinos have played a central role in the discovery of the neutrino oscillation mechanism. They still are proving to be a unique tool to help investigate the fusion reactions that power stars and further probe basic neutrino properties. The Borexino neutrino observatory has been operationally acquiring data at Laboratori Nazionali del Gran Sasso in Italy since 2007. Its main goal is the real-time study of low energy neutrinos (solar or originated elsewhere, such as geo-neutrinos). The latest analysis of experimental data, taken during the so-called Borexino Phase-II (2011-present), will be showcased in this talk - yielding new high-precision, simultaneous wide band flux measurements of the four main solar neutrino components belonging to the "pp" fusion chain (pp, pep, 7Be, 8B), as well as upper limits on the remaining two solar neutrino fluxes (CNO and hep).

Published
2018

31. Solar Neutrinos Spectroscopy with Borexino Phase-II

Author

Matthias Laubenstein, D. Basilico, D. Bravo, Y. Suvorov, A. Vishneva, Fausto Ortica, L.F.F. Stokes, Cristiano Galbiati, D. Guffanti, Oleg Smirnov, S. Schoenert, M. Redchuk, K. Choi, M. Gromov, K. Altenmueller, M. D. Skorokhvatov, Michael Wurm, Denis Korablev, E. Meroni, Marcin Wójcik, E. Hungerford, L. Lukyanchenko, A. M. Goretti, Andrey Formozov, Z. Yokley, M. Gschwender, V. Atroshchenko, M. S. Meyer, S. Rottenanger, Lino Miramonti, Jay Burton Benziger, G. Bonfini, Ö. Penek, B. Vogelaar, A. Pocar, Frank Calaprice, V. Orekhov, L. Papp, Lothar Oberauer, Paolo Lombardi, G. Bellini, Irene Bolognino, Franz von Feilitzsch, G. Manuzio, O. Zaimidoroga, S. Marcocci, M. Carlini, G. Lukyanchenko, M. Toropova, L. Collica, V. V. Kobychev, S. Davini, B. Neumair, E. V. Unzhakov, A. Razeto, Andrea Ianni, G. Korga, K. Fomenko, D. Bick, Sandra Zavatarelli, Lea Di noto, F. Gabriele, S. Weinz, D. Jeschke, G. Raikov, Z. Bagdasarian, S. Caprioli, I. S. Drachnev, Livia Ludhova, A. S. Chepurnov, C. Ghiano, Caren Hagner, P. Cavalcante, M. Misiaszek, Tobias Lachenmaier, Marco Giammarchi, Matteo Agostini, D. Franco, J. Martyn, E. Litvinovich, N. Pilipenko, A. V. Derbin, B. Opitz, Xuefeng Ding, D. A. Semenov, T. Houdy, J. Thurn, A. Caminata, Aldo Ianni, G. Testera, A. Sotnikov, J. Maricic, S. Appel, Aldo Romani, G. Zuzel, Antonio Di Ludovico, A. Jany, Roberto Tartaglia, Alessandra Re, B. Caccianiga, I. N. Machulin, N. Rossi, Gioacchino Ranucci, Marco Pallavicini, V. N. Muratova, Alessio Porcelli, Kai Zuber, L. Pietrofaccia, F. Cavanna, F. Lombardi, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
lcsh:QC793-793.5, fusion, neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, neutrino: flux, Nuclear physics, star, Observatory, 0103 physical sciences, talk: Kolymbari 2018/07/04, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear fusion, ddc:530, neutrino oscillation, Spectroscopy, Neutrino oscillation, 010303 astronomy & astrophysics, Borexino, Physics, 010308 nuclear & particles physics, neutrino: energy: low, High Energy Physics::Phenomenology, lcsh:Elementary particle physics, Solar neutrinos, Gran Sasso, observatory, Stars, 13. Climate action, solar neutrinos, Computer Science::Programming Languages, High Energy Physics::Experiment, neutrino: oscillation, Neutrino, neutrino: geophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], experimental results
Abstract

Solar neutrinos have played a central role in the discovery of the neutrino oscillation mechanism. They still are proving to be a unique tool to help investigate the fusion reactions that power stars and further probe basic neutrino properties. The Borexino neutrino observatory has been operationally acquiring data at Laboratori Nazionali del Gran Sasso in Italy since 2007. Its main goal is the real-time study of low energy neutrinos (solar or originated elsewhere, such as geo-neutrinos). The latest analysis of experimental data, taken during the so-called Borexino Phase-II (2011-present), will be showcased in this talk&mdash, yielding new high-precision, simultaneous wide band flux measurements of the four main solar neutrino components belonging to the &ldquo, pp&rdquo, fusion chain (pp, pep, 7 Be, 8 B), as well as upper limits on the remaining two solar neutrino fluxes (CNO and hep).

Published
2018

32. Solar neutrino spectroscopy in Borexino

Author

G. Raikov, G. Lukyanchenko, Aldo Romani, G. Korga, L. Di Noto, R. Tartaglia, Livia Ludhova, Z. Bagdasarian, L. Cappelli, Jay Burton Benziger, Aldo Ianni, E. V. Hungerford, A. M. Goretti, A. S. Chepurnov, M. Carlini, Andrea Ianni, Sandra Zavatarelli, M. Gschwender, J. Thurn, B. Neumair, Cristiano Galbiati, M. Meyer, D. Bravo, K. Fomenko, D. Basilico, Ö. Penek, A. Sotnikov, L. Papp, P. Cavalcante, S. Appel, K. Altenmüller, G. Bonfini, D. Franco, A. Razeto, D. A. Semenov, A. Vishneva, Fausto Ortica, M. D. Skorokhvatov, Michael Wurm, Frank Calaprice, S. Caprioli, M. Redchuk, D. Guffanti, S. Weinz, G. Testera, S. Rottenanger, Tobias Lachenmaier, Marco Giammarchi, K. Choi, Alessandra Re, Paolo Lombardi, M. Gromov, M. Nieslony, Lino Miramonti, N. Pilipenko, S. Schönert, G. Bellini, Gioacchino Ranucci, O. Zaimidoroga, S. Davini, T. Houdy, F. von Feilitzsch, V. V. Kobychev, F. Cavanna, Matteo Agostini, B. Caccianiga, A. Jany, V. Orekhov, R. B. Vogelaar, J. Maricic, C. Ghiano, A. Caminata, S. Kumaran, Marco Pallavicini, A. V. Derbin, V. N. Muratova, F. Gabriele, M. M. Wojcik, I. S. Drachnev, M. Misiaszek, D. Jeschke, A. Formozov, L.F.F. Stokes, O. Smirnov, S. Marcocci, I. N. Machulin, L. Collica, G. Zuzel, D. D'Angelo, A. Porcelli, E. V. Unzhakov, Kai Zuber, A. Di Ludovico, G. Manuzio, A. Pocar, L. Pietrofaccia, Y. Suvorov, J. Martyn, E. Litvinovich, N. Rossi, Xuefeng Ding, Matthias Laubenstein, L. Lukyanchenko, E. Meroni, V. Atroshchenko, Lothar Oberauer, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, Metallicity, Nuclear physics, background: low, neutrino: spectrum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutrino oscillation, Spectroscopy, Borexino, Physics, Proton–proton chain reaction, pp-chain, p p: fusion, precision measurement, Detector, Automatic Keywords, 13. Climate action, solar neutrinos, spectral, High Energy Physics::Experiment, neutrino: oscillation, Neutrino, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; In more than ten years of operation, Borexino has performed a precision measurement of the solar neutrino spectrum, resolving almost all spectral components originating from the proton-proton fusion chain. The presentation will review the results recently released for the second data taking phase 2012–2016 during which the detector excelled by its unprecedentedly low background levels. New results on the rate of pp, 7Be, pep and 8B neutrinos as well as their implications for solar neutrino oscillations and metallicity are discussed.

Published
2018

33. Perspectives for CNO neutrino detection in Borexino

Author

V. Atroshchenko, D. A. Semenov, Y. Suvorov, Ö. Penek, Lothar Oberauer, N. Pilipenko, Matthias Laubenstein, D. Bravo, C. Ghiano, M. M. Wojcik, D. Basilico, Andrey Formozov, M. Redchuk, V. N. Muratova, G. Testera, J. Thurn, M. D. Skorokhvatov, Michael Wurm, O. Zaimidoroga, J. Martyn, E. Litvinovich, D. Franco, F. von Feilitzsch, A. Razeto, N. Rossi, L. Lukyanchenko, Jay Burton Benziger, L. Di Noto, Cristiano Galbiati, M. Misiaszek, V. Orekhov, V. V. Kobychev, Matteo Agostini, I. N. Machulin, G. Bonfini, S. Davini, Frank Calaprice, M. Carlini, D. D'Angelo, S. Kumaran, A. Porcelli, Xuefeng Ding, G. Lukyanchenko, E. Meroni, A. Jany, M. Gromov, S. Appel, G. Bellini, A. Pocar, R. B. Vogelaar, B. Neumair, M. Meyer, T. Houdy, K. Fomenko, L. Papp, M. Gschwender, Fausto Ortica, G. Raikov, R. Tartaglia, Gioacchino Ranucci, D. Guffanti, I. S. Drachnev, O. Smirnov, B. Caccianiga, Livia Ludhova, S. Caprioli, G. Zuzel, K. Choi, E. V. Hungerford, A. M. Goretti, A. S. Chepurnov, Tobias Lachenmaier, Marco Giammarchi, Paolo Lombardi, Lino Miramonti, A. Sotnikov, Aldo Ianni, Aldo Romani, A. Di Ludovico, P. Cavalcante, F. Cavanna, G. Manuzio, A. V. Derbin, S. Weinz, Alessandra Re, E. V. Unzhakov, L.F.F. Stokes, Kai Zuber, D. Jeschke, L. Pietrofaccia, J. Maricic, A. Vishneva, G. Korga, Z. Bagdasarian, Andrea Ianni, Sandra Zavatarelli, S. Rottenanger, Luigi Cappelli, S. Schönert, K. Altenmüller, M. Nieslony, S. Marcocci, L. Collica, A. Caminata, Marco Pallavicini, F. Gabriele, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Meyer, M, Zuber, K, Guffanti, D, Agostini, M, Altenmüller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Cappelli, L, Caprioli, S, Carlini, M, Cavalcante, P, Cavanna, F, Chepurnov, A, Choi, K, Collica, L, D’Angelo, D, Davini, S, Derbin, A, Ding, X, Di Ludovico, A, Di Noto, L, Drachnev, I, Fomenko, K, Formozov, A, Franco, D, Gabriele, F, Galbiati, C, Gschwender, M, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Houdy, T, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kumaran, S, Kobychev, V, Korga, G, Lachenmaier, T, Laubenstein, M, Litvinovich, E, Lombardi, P, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Maricic, J, Martyn, J, Meroni, E, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Nieslony, M, Oberauer, L, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, Ö, Pietrofaccia, L, Pilipenko, N, Pocar, A, Porcelli, A, Raikov, G, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Romani, A, Rossi, N, Rottenanger, S, Schönert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stokes, L, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Unzhakov, E, Vishneva, A, Vogelaar, R, von Feilitzsch, F, Weinz, S, Wojcik, M, Wurm, M, Zaimidoroga, O, Zavatarelli, S, Zuzel, G, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
CNO cycle, experimental methods, neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, scintillation counter: liquid, Solar neutrinos, bismuth: admixture, Astrophysics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, CNO-cycle, neutrino: flux, Astrophysics::Solar and Stellar Astrophysics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Stellar evolution, Borexino, liquid scintillator, Astrophysics::Galaxy Astrophysics, Physics, Energy distribution, detector, background, bismuth: nuclide, Neutrino detector, 13. Climate action, Experimental methods, Neutrino
Abstract

International audience; Borexino measured with unprecedented accuracy the fluxes of solar neutrinos emitted at all the steps of the pp fusion chain. Still missing is the measurement of the flux of neutrinos produced in the CNO cycle. A positive measurement of the CNO neutrino flux is of fundamental importance for understanding the evolution of stars and addressing the unresolved controversy on the solar abundances. The measurement of the CNO neutrino flux in Borexino is challenging because of the low intensity of this component (CNO cycle accounts for about 1% of the energy emitted by Sun), the lack of prominent spectral features and the presence of background sources. The main background component is 210Bi decaying in the liquid scintillator of Borexino that creates events with an energy distribution very close to the one of CNO neutrino interactions. Since 2015 the collaboration undertook significant efforts to achieve an independent measurement of the background affecting a CNO measurement, whose impact on the sensitivity to a CNO signal will be discussed.

Published
2018

34. Improved Limit on Neutrinoless Double- β Decay of Ge76 from GERDA Phase II

Author

L. V. Inzhechik, D. R. Zinatulina, O. Schulz, Mikael Hult, T. Comellato, V. G. Egorov, M. Balata, V. Wagner, G. Zuzel, L. Vanhoefer, C. Bauer, A. A. Vasenko, T. Bode, Stefano Riboldi, A.-K. Schütz, A. Hegai, N. Di Marco, M. Misiaszek, F. Salamida, R. Brugnera, A. Garfagnini, V. V. Kuzminov, Matteo Agostini, Manfred Lindner, J. Janicskó Csáthy, V. N. Kornoukhov, Y. Kermaïdic, A. Kish, K. Pelczar, A. V. Veresnikova, J. Hakenmüller, I. Zhitnikov, Ivano Lippi, Allen Caldwell, A. Chernogorov, M. Junker, C. Wiesinger, A. Wegmann, M. Shirchenko, R. Hiller, L. Pertoldi, Igor Nemchenok, Guillaume Lutter, A. Kirsch, O. Selivanenko, A. M. Bakalyarov, A. Lubashevskiy, W. Maneschg, S. Hemmer, M. Laubenstein, E. A. Yanovich, K. von Sturm, Bela Majorovits, R. Falkenstein, P. Grabmayr, B. Schneider, I. V. Kirpichnikov, V. I. Gurentsov, V. V. Kazalov, M. Miloradovic, D. Borowicz, J. Biernat, Bayarto Lubsandorzhiev, R. Mingazheva, C. Schmitt, B. Schwingenheuer, R. Kneißl, O.I. Kochetov, Th. Kihm, A. M. Gangapshev, P. Moseev, Luciano Pandola, A. A. Klimenko, Werner Hofmann, M. Heisel, N. Rumyantseva, A. Zschocke, Alessandro Bettini, E. V. Demidova, S. Belogurov, C. Macolino, A. Pullia, Cinzia Sada, V. D'Andrea, A. Lazzaro, S. Schönert, K. Panas, T. Wester, A.A. Smolnikov, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, M. M. Wojcik, E. Bellotti, E. Doroshkevich, L. B. Bezrukov, E. Shevchik, A. Domula, L. Stanco, V.B. Brudanin, C. Ransom, Hardy Simgen, Josef Jochum, I. R. Barabanov, S. V. Zhukov, K. N. Gusev, K. T. Knöpfle, and Laura Baudis

Subjects
Semileptonic decay, Physics, 010308 nuclear & particles physics, Phase (waves), General Physics and Astronomy, chemistry.chemical_element, Germanium, Type (model theory), 01 natural sciences, chemistry, Double beta decay, 0103 physical sciences, Sensitivity (control systems), Atomic physics, 010306 general physics, Energy (signal processing), Diode
Abstract

The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of ^{76}Ge (^{76}Ge→^{76}Se+2e^{-}) operating bare Ge diodes with an enriched ^{76}Ge fraction in liquid argon. The exposure for broad-energy germanium type (BEGe) detectors is increased threefold with respect to our previous data release. The BEGe detectors feature an excellent background suppression from the analysis of the time profile of the detector signals. In the analysis window a background level of 1.0_{-0.4}^{+0.6}×10^{-3} counts/(keV kg yr) has been achieved; if normalized to the energy resolution this is the lowest ever achieved in any 0νββ experiment. No signal is observed and a new 90% C.L. lower limit for the half-life of 8.0×10^{25} yr is placed when combining with our previous data. The expected median sensitivity assuming no signal is 5.8×10^{25} yr.

Published
2018

35. Comprehensive measurement of pp-chain solar neutrinos

Author

J. Martyn, E. Litvinovich, N. Rossi, B. Opitz, G. Lukyanchenko, Xuefeng Ding, O. Smirnov, A. Di Ludovico, M. Redchuk, Aldo Ianni, Z. Yokley, D. Jeschke, G. Manuzio, D. Kryn, Marcin Wójcik, V. Atroshchenko, A. Pocar, G. Raikov, M. D. Skorokhvatov, A. V. Derbin, Ö. Penek, Z. Bagdasarian, Matteo Agostini, P. Cavalcante, H. ang, K. Fomenko, F.L. Villante, Lothar Oberauer, Michael Wurm, S. Caprioli, D. A. Semenov, O. Zaimidoroga, Matthias Laubenstein, G. Bonfini, Y. Suvorov, A. Caminata, L. Lukyanchenko, V. V. Kobychev, A. Vishneva, Lino Miramonti, T. Houdy, E. V. Unzhakov, I. N. Machulin, J. Thurn, K. Choi, R. Roncin, M. Gromov, V. N. Muratova, Gioacchino Ranucci, E. Meroni, Marco Giammarchi, S. Schönert, A. Razeto, N. Pilipenko, Marco Pallavicini, S. Weinz, D. D'Angelo, G. Bellini, D. Franco, C. Ghiano, S. Marcocci, Caren Hagner, R. Tartaglia, M. Toropova, L. Collica, M. S. Meyer, G. Testera, Cristiano Galbiati, L.F.F. Stokes, F. Gabriele, K. Altenmüller, D. Bravo, Aldo Romani, S. Appel, L. Di Noto, M. Misiaszek, S. Davini, D. Basilico, Andrea Ianni, D. Bick, Sandra Zavatarelli, Paolo Lombardi, A. Porcelli, G. Korga, B. Caccianiga, F. Lombardi, Kai Zuber, I. S. Drachnev, A. Jany, E. V. Hungerford, A. Sotnikov, Jay Burton Benziger, Alessandra Re, G. Zuzel, R. B. Vogelaar, M. Carlini, B. Neumair, L. Papp, Fausto Ortica, D. Korablev, D. Guffanti, Andrey Formozov, F. von Feilitzsch, V. Orekhov, Frank Calaprice, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), BOREXINO, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Collica, L., D’Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di ludovico, A., Di noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Ã ., Pilipenko, N., Pocar, A., Porcelli, A., Raikov, G., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Schönert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Villante, F. L., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Caprioli, S, Carlini, M, Cavalcante, P, Chepurnov, A, Choi, K, Collica, L, D'Angelo, D, Davini, S, Derbin, A, Ding, X, Diludovico, A, Dinoto, L, Drachnev, I, Fomenko, K, Formozov, A, Franco, D, Gabriele, F, Galbiati, C, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Houdy, T, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kobychev, V, Korablev, D, Korga, G, Kryn, D, Laubenstein, M, Litvinovich, E, Lombardi, F, Lombardi, P, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Oberauer, L, Opitz, B, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pilipenko, N, Pocar, A, Porcelli, A, Raikov, G, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Romani, A, Roncin, R, Rossi, N, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stokes, L, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Toropova, M, Unzhakov, E, Villante, F, Vishneva, A, Vogelaar, R, von Feilitzsch, F, Wang, H, Weinz, S, Wojcik, M, Wurm, M, Yokley, Z, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
Nuclear reaction, electron, neutrino: solar, Solar neutrino, Electron, 01 natural sciences, 7. Clean energy, nuclear reaction, neutrino: flux, energy: threshold, energy: solar, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010303 astronomy & astrophysics, Borexino, Physics, Proton–proton chain reaction, Multidisciplinary, S067SES, S067B7T, semileptonic decay, neutrino electron: elastic scattering, Neutrino, model: solar, chemistry.chemical_element, helium, neutrino: beam, S067SBT, Nuclear physics, S067CNT, 0103 physical sciences, S067HPT, surface, Helium, S067PPT, Liquid Scintillator, pp-chain, p p: fusion, 010308 nuclear & particles physics, business.industry, temperature, Detector, S067PET, Solar energy, Gran Sasso, chemistry, hydrogen, High Energy Physics::Experiment, business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], experimental results
Abstract

International audience; About 99 per cent of solar energy is produced through sequences of nuclear reactions that convert hydrogen into helium, starting from the fusion of two protons (the pp chain). The neutrinos emitted by five of these reactions represent a unique probe of the Sun’s internal working and, at the same time, offer an intense natural neutrino beam for fundamental physics. Here we report a complete study of the pp chain. We measure the neutrino–electron elastic-scattering rates for neutrinos produced by four reactions of the chain: the initial proton–proton fusion, the electron-capture decay of beryllium-7, the three-body proton–electron–proton (pep) fusion, here measured with the highest precision so far achieved, and the boron-8 beta decay, measured with the lowest energy threshold. We also set a limit on the neutrino flux produced by the$^{3}$He–proton fusion (hep). These measurements provide a direct determination of the relative intensity of the two primary terminations of the pp chain (pp-I and pp-II) and an indication that the temperature profile in the Sun is more compatible with solar models that assume high surface metallicity. We also determine the survival probability of solar electron neutrinos at different energies, thus probing simultaneously and with high precision the neutrino flavour-conversion paradigm, both in vacuum and in matter-dominated regimes.

Published
2018

36. The measurement of the pp chain solar neutrinos in Borexino

Author

G. Testera, J. Martyn, N. Pilipenko, Lothar Oberauer, M. Redchuk, A. Sotnikov, E. Litvinovich, Matteo Agostini, Matthias Laubenstein, N. Rossi, D. A. Semenov, S. Davini, T. Houdy, L. Lukyanchenko, R. Tartaglia, A. Pocar, E. Meroni, S. Weinz, S. Appel, A. Razeto, C. Ghiano, Xuefeng Ding, Gioacchino Ranucci, O. Smirnov, M. Gschwender, A. Jany, D. Franco, O. Zaimidoroga, P. Cavalcante, S. Kumaran, Alessandra Re, G. Lukyanchenko, Tobias Lachenmaier, Marco Giammarchi, E. V. Unzhakov, V. V. Kobychev, J. Thurn, D. Basilico, M. Misiaszek, A. Cappelli, B. Caccianiga, R. B. Vogelaar, F.L. Villante, V. N. Muratova, ̈. Penek, Y. Suvorov, G. Zuzel, D. Jeschke, M. D. Skorokhvatov, Michael Wurm, Kai Zuber, I. S. Drachnev, Lino Miramonti, M. M. Wojcik, D. Bravo, A. Di Ludovico, Aldo Ianni, V. Atroshchenko, J. Maricic, I. N. Machulin, L. Pietrofaccia, S. Caprioli, D. D'Angelo, L.F.F. Stokes, A. Porcelli, S. Rottenanger, Paolo Lombardi, Aldo Romani, L. Di Noto, S. Schönert, M. Gromov, Andrea Ianni, Sandra Zavatarelli, K. Choi, F. Cavanna, Jay Burton Benziger, A. V. Derbin, G. Bellini, Z. Bagdasarian, G. Korga, A. Vishneva, G. Manuzioc, C. Galbiati, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, A. Raikov, G. Bonfini, Frank Calaprice, A. Caminata, Marco Pallavicini, F. Gabriele, K. Altenmüller, M. Carlini, M. Nieslony, B. Neumair, M. Meyer, S. Marcocci, L. Collica, K. Fomenko, Andrey Formozov, F. von Feilitzsch, V. Orekhov, L. Papp, Fausto Ortica, D. Guffanti, and E. V. Hungerford

Subjects
Proton–proton chain reaction, Physics, Particle physics, Solar neutrino, Borexino
Published
2018

37. Mitigation of $$^{42}$$42Ar/$$^{42}$$42K background for the GERDA Phase II experiment

Author

K. Pelczar, A. M. Gangapshev, A. A. Klimenko, K. N. Gusev, M. Heisel, A. Lubashevskiy, B. Lehnert, A.A. Smolnikov, A. Lazzaro, Stefan Schönert, Matteo Agostini, D. Budjáš, Marc Walter, and G. Zuzel

Subjects
Physics, Scintillation, Argon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Continuous spectrum, chemistry.chemical_element, lcsh:Astrophysics, Germanium, Electron, 01 natural sciences, Ion, Nuclear physics, chemistry, Double beta decay, lcsh:QB460-466, 0103 physical sciences, lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Decay chain, 010306 general physics, Engineering (miscellaneous)
Abstract

Background coming from the $$^{42}$$ Ar decay chain is considered to be one of the most relevant for the Gerda experiment, which searches for the neutrinoless double beta decay of $$^{76}$$ Ge. The sensitivity strongly relies on the absence of background around the Q-value of the decay. Background coming from $$^{42}$$ K, a progeny of $$^{42}$$ Ar, can contribute to that background via electrons from the continuous spectrum with an endpoint at 3.5 MeV. Research and development on the suppression methods targeting this source of background were performed at the low-background test facility LArGe . It was demonstrated that by reducing $$^{42}$$ K ion collection on the surfaces of the broad energy germanium detectors in combination with pulse shape discrimination techniques and an argon scintillation veto, it is possible to suppress $$^{42}$$ K background by three orders of magnitude. This is sufficient for Phase II of the Gerda experiment.

Published
2018

38. Searching Neutrinoless Double Beta Decay with Gerda Phase II

Author

V. D'Andrea, O. Schulz, L. B. Bezrukov, J. Janicskó Csáthy, Elena Sala, E. Shevchik, K. Panas, A. Lazzaro, A. Kirsch, Josef Jochum, Y. Kermaïdic, S. Schönert, W. Maneschg, Ivano Lippi, E. A. Yanovich, Stefano Nisi, R. Mingazheva, I. Zhitnikov, I. R. Barabanov, A. Lubashevskiy, C. Gooch, C. Wiesinger, S. V. Zhukov, B. Schweisshelm, B. Schwingenheuer, A. Garfagnini, M. Shirchenko, T. Wester, A. Domula, A.A. Smolnikov, C. Cattadori, Anna Julia Zsigmond, Kai Zuber, V. I. Gurentsov, T. Comellato, V. Kazalov, A. Kish, A. V. Veresnikova, L. Stanco, V. G. Egorov, M. M. Wojcik, Allen Caldwell, L. Ioannucci, Bayarto Lubsandorzhiev, V. Wagner, M. Balata, C. Ransom, C. Bauer, Stefano Riboldi, M. Junker, C. Hahne, A. Chernogorov, F. Salamida, A. A. Vasenko, Th. Kihm, L. Vanhoefer, Hardy Simgen, T. Bode, L. V. Inzhechik, S. Hemmer, M. Reissfelder, R. Hiller, V. B. Brudanin, K. von Sturm, E. Bellotti, M. Misiaszek, H. Seitz, A. Wegmann, Manfred Lindner, M. Giordano, E. Doroshkevich, Igor Nemchenok, R. Kneißl, B. Schneider, G. Zuzel, P. Moseev, Bela Majorovits, Luciano Pandola, D. R. Zinatulina, Werner Hofmann, A. A. Klimenko, M. Heisel, N. Rumyantseva, M. Laubenstein, P. Holl, J. Hakenmüller, P. Grabmayr, A. Zschocke, I. V. Kirpichnikov, Mikael Hult, E. V. Demidova, M. Miloradovic, O. Selivanenko, S. Belogurov, R. Falkenstein, Jochen Schreiner, C. Schmitt, V. N. Kornoukhov, K. Pelczar, Guillaume Lutter, A. M. Bakalyarov, A.-K. Schütz, A. Hegai, N. Di Marco, K. N. Gusev, R. Brugnera, V. V. Kuzminov, K. T. Knöpfle, Matteo Agostini, Laura Baudis, Gerd Marissens, O.I. Kochetov, A. M. Gangapshev, Alessandro Bettini, C. Macolino, A. Pullia, and Cinzia Sada

Subjects
Physics, Ge-76, Particle physics, Double beta decay, Phase (waves), Beta (velocity), Neutrino, Neutrinoless double beta decay, Semiconductor detector
Abstract

An observation of neutrinoless double beta ([Formula: see text]) decay would allow to shed light onto the nature of neutrinos. Gerda (GERmanium Detector Array) aims to discover this process in a background-free search using [Formula: see text]Ge. The experiment is located at the Laboratori Nazionali del Gran Sasso (LNGS) of the Istituto Nazionale di Fisica Nucleare (INFN) in Italy. Bare, isotopically enriched, high purity germanium detectors are operated in liquid argon. Gerda follows a staged approach. In Phase II 35.6 kg of enriched germanium detectors are operated since December 2015. The application of active background rejection methods, such as a liquid argon scintillation light read-out and pulse shape discrimination of germanium detector signals, allows to reduce the background index to the intended level of [Formula: see text] cts/(keV⋅kg⋅yr). No evidence for the [Formula: see text] decay has been found in 23.2 kg⋅yr of Phase II data, and together with data from Phase I the up-to-date most stringent half-life limit for this process in [Formula: see text]Ge has been established, at a median sensitivity of 5.8⋅10[Formula: see text][Formula: see text]yr the 90[Formula: see text]% C.L. lower limit is 8.0⋅10[Formula: see text][Formula: see text]yr.

Published
2018

39. Edge plasma physics modifications due to magnetic ripple in RFX-mod

Author

Paolo Scarin, N. Vianello, G. De Masi, Lorella Carraro, G. Ciaccio, Matteo Agostini, Gianluca Spizzo, Roberto Cavazzana, and M. Spolaore

Subjects
Nuclear and High Energy Physics, Electron density, Electric fields, Edge properties, Magnetic topologies, media_common.quotation_subject, Electron diffusion, Electron, Topology, Asymmetry, Ambipolar radial electric fields, Edge turbulence, Physics::Plasma Physics, Electric field, General Materials Science, Magnetic pressure, Magnetoplasma, media_common, Physics, Reversed field pinch, Ambipolar diffusion, Electric field effects, Magnetism, Particle transport, Plasma turbulence, Plasma, TRANSPORT, Nuclear Energy and Engineering, Magnetic ripples, Electric discharges, Atomic physics
Abstract

The edge of the RFX-mod ( R = 2 m, a = 0.46 m) Reversed Field Pinch is characterized by weak magnetic chaos affecting ion and electron diffusion. Edge particle transport is strongly influenced by a toroidal asymmetry caused by magnetic islands. An ambipolar radial electric field ensures local neutrality and possesses the same symmetry as the parent magnetic ripple: the result is the modulation of the perpendicular flow, with a slowing-down at the island X-point. In this paper we present a complete statistical analysis, over a large database of RFX-mod discharges, of the edge properties as they are modified by the magnetic topology: the plasma wall footprint follows the helical shape of the dominant central mode ( m / n = 1/7), with an increase of H α emission and electron density corresponding to the O-point of the inner magnetic island. Edge turbulence is modified by the magnetic topology, being generated in the O-point region and damped near the X-point.

Published
2015

40. Limiting neutrino magnetic moments with Borexino Phase-II solar neutrino data

Author

Y. Suvorov, S. Davini, R. B. Vogelaar, J. Martyn, E. Litvinovich, I. N. Machulin, Matthias Laubenstein, N. Rossi, M. Carlini, D. A. Semenov, Marco Pallavicini, L. Lukyanchenko, M. D. Skorokhvatov, S. Caprioli, B. Opitz, D. D'Angelo, O. Zaimidoroga, H. Wang, Aldo Ianni, Michael Wurm, Z. Bagdasarian, Kai Zuber, S. Weinz, Xuefeng Ding, B. Neumair, T. Houdy, G. Korga, S. Appel, F. Froborg, K. Fomenko, L. Papp, G. Lukyanchenko, E. Meroni, V. V. Kobychev, C. Ghiano, G. Bellini, A. M. Goretti, Fausto Ortica, Caren Hagner, Z. Yokley, D. Guffanti, V. Atroshchenko, M. Redchuk, Aldo Romani, L.F.F. Stokes, I. S. Drachnev, Matteo Agostini, Marcin Wójcik, Andrey Formozov, N. Pilipenko, D. Franco, P. Cavalcante, D. Kryn, A. Di Ludovico, L. Di Noto, Jay Burton Benziger, Alessandra Re, G. Manuzio, M. S. Meyer, M. Misiaszek, F. von Feilitzsch, A. Vishneva, Lothar Oberauer, O. Smirnov, V. Orekhov, V. N. Muratova, B. Caccianiga, E. V. Unzhakov, D. Bravo, Paolo Lombardi, K. Choi, Lino Miramonti, M. Gromov, A. Pocar, D. Jeschke, D. Basilico, G. Bonfini, F. Lombardi, A. V. Derbin, A. Razeto, J. Thurn, R. Tartaglia, R. Roncin, Frank Calaprice, Marco Giammarchi, Ö. Penek, G. Testera, C. Galbiati, Livia Ludhova, A. S. Chepurnov, Denis Korablev, E. V. Hungerford, A. Sotnikov, S. Schönert, Andrea Ianni, D. Bick, Sandra Zavatarelli, A. Porcelli, Gioacchino Ranucci, A. Caminata, G. Zuzel, F. Gabriele, A. Jany, K. Altenmüller, S. Marcocci, M. Toropova, L. Collica, Agostini, M, Altenmuller, K, Appel, S, Atroshchenko, V, Bagdasarian, Z, Basilico, D, Bellini, G, Benziger, J, Bick, D, Bonfini, G, Bravo, D, Caccianiga, B, Calaprice, F, Caminata, A, Caprioli, S, Carlini, M, Cavalcante, P, Chepurnov, A, Choi, K, Collica, L, D'Angelo, D, Davini, S, Derbin, A, Ding, X, Di Ludovico, A, Di Noto, L, Drachnev, I, Fomenko, K, Formozov, A, Franco, D, Froborg, F, Gabriele, F, Galbiati, C, Ghiano, C, Giammarchi, M, Goretti, A, Gromov, M, Guffanti, D, Hagner, C, Houdy, T, Hungerford, E, Ianni, A, Jany, A, Jeschke, D, Kobychev, V, Korablev, D, Korga, G, Kryn, D, Laubenstein, M, Litvinovich, E, Lombardi, F, Lombardi, P, Ludhova, L, Lukyanchenko, G, Lukyanchenko, L, Machulin, I, Manuzio, G, Marcocci, S, Martyn, J, Meroni, E, Meyer, M, Miramonti, L, Misiaszek, M, Muratova, V, Neumair, B, Oberauer, L, Opitz, B, Orekhov, V, Ortica, F, Pallavicini, M, Papp, L, Penek, O, Pilipenko, N, Pocar, A, Porcelli, A, Ranucci, G, Razeto, A, Re, A, Redchuk, M, Romani, A, Roncin, R, Rossi, N, Schonert, S, Semenov, D, Skorokhvatov, M, Smirnov, O, Sotnikov, A, Stokes, L, Suvorov, Y, Tartaglia, R, Testera, G, Thurn, J, Toropova, M, Unzhakov, E, Vishneva, A, Vogelaar, R, Von Feilitzsch, F, Wang, H, Weinz, S, Wojcik, M, Wurm, M, Yokley, Z, Zaimidoroga, O, Zavatarelli, S, Zuber, K, Zuzel, G, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Borexino, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Agostini, M., Altenmueller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Collica, L., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Fomenko, K., Formozov, A., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goretti, A., Gromov, M., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, O., Pilipenko, N., Pocar, A., Porcelli, A., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Schoenert, S., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., AstroParticule et Cosmologie ( APC - UMR 7164 ), and Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )

Subjects
Physics and Astronomy (miscellaneous), neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, 01 natural sciences, High Energy Physics - Experiment, Neutrino detector, High Energy Physics - Experiment (hep-ex), SPIN ROTATION, High Energy Physics - Phenomenology (hep-ph), electron: recoil, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::Solar and Stellar Astrophysics, Borexino, S066MGM, gallium, Physics, Magnetic moment, neutrino: magnetic moment, High Energy Physics - Phenomenology, neutrino: moment, neutrino: flavor, neutrino: Majorana, Measurements of neutrino speed, Neutrino, upper limit, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, DECAYS, Nuclear physics, statistical analysis, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, ddc:530, 010306 general physics, Neutrino oscillation, DETECTOR, ELECTROMAGNETIC PROPERTIES, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Solar neutrino problem, MAJORANA NEUTRINOS, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], electron: energy spectrum, [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, experimental results
Abstract

A search for the solar neutrino effective magnetic moment has been performed using data from 1291.5 days exposure during the second phase of the Borexino experiment. No significant deviations from the expected shape of the electron recoil spectrum from solar neutrinos have been found, and a new upper limit on the effective neutrino magnetic moment of $\mu_{\nu}^{eff}$ $, Comment: 7 pages, 2 figures

Published
2017

41. CeSOX: An experimental test of the sterile neutrino hypothesis with Borexino

Author

L. Papp, A. Di Ludovico, Fausto Ortica, Matthias Laubenstein, G. Manuzio, D. Guffanti, Denis Korablev, L. Lukyanchenko, E. Meroni, V. Fischer, C. Ghiano, Caren Hagner, M. Carlini, A. Caminata, Marco Pallavicini, Z. Yokley, Ö. Penek, F. Gabriele, S. Appel, Aldo Romani, V. Atroshchenko, L. Di Noto, B. Neumair, M. Meyer, A. V. Derbin, S. Farinon, M. Misiaszek, A. Formozov, N. Pilipenko, G. Lukyanchenko, G. Testera, Lothar Oberauer, A. Pocar, M. D. Skorokhvatov, Michael Wurm, Alessandra Re, A Trantel, J. Martyn, E. Litvinovich, O. Zaimidoroga, A. Jany, F. Lombardi, H. Wang, K. Altenmüller, N. Jonquères, S. Rottenanger, G. Mention, N. Rossi, B. Caccianiga, E. V. Hungerford, Y. Suvorov, B. Opitz, R. B. Vogelaar, D. A. Semenov, Marcin Wójcik, S. Caprioli, Livia Ludhova, I. N. Machulin, V. V. Kobychev, A. Sotnikov, Aldo Ianni, A. M. Goretti, A. S. Chepurnov, V. Kornoukhov, S. Schönert, Xuefeng Ding, G. Bellini, Tobias Lachenmaier, D. D'Angelo, Marco Giammarchi, V. N. Muratova, M. Durero, A. Porcelli, C. Veyssiere, M. Cribier, O. Smirnov, A. Vishneva, Thierry Lasserre, M. Gschwender, S. Davini, Matteo Agostini, L.F.F. Stokes, E. V. Unzhakov, R. Tartaglia, G. Zuzel, S. Marcocci, S. Weinz, Lino Miramonti, D. Bravo, M. Toropova, L. Collica, Jay Burton Benziger, G. Korga, Paolo Lombardi, Z. Bagdasarian, J. Maricic, P. Cavalcante, Gioacchino Ranucci, G. Bonfini, Andrea Ianni, Frank Calaprice, D. Bick, Sandra Zavatarelli, K. Fomenko, J. Thurn, R. Roncin, F. von Feilitzsch, D. Franco, Kai Zuber, J. Gaffiot, D. Kryn, M. Redchuk, K. Choi, O. Cloué, L. Scola, V. Orekhov, D. Jeschke, R. Musenich, M. Vivier, Cristiano Galbiati, M. Gromov, T. Houdy, D. Basilico, A. Razeto, I. S. Drachnev, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Gromov, M., Agostini, M., Altenmueller, K., Appel, S., Atroshchenko, V., Bagdasarian, Z., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., Cloue, O., Collica, L., Cribier, M., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Ludovico, A., Di Noto, L., Drachnev, I., Durero, M., Farinon, S., Fischer, V., Fomenko, K., Formozov, A., Franco, D., Gabriele, F., Gaffiot, J., Galbiati, C., Gschwender, M., Ghiano, C., Giammarchi, M., Goretti, A., Guffanti, D., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jonqueres, N., Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kornoukhov, V., Kryn, D., Lachenmaier, T., Lasserre, T., Laubenstein, M., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Lukyanchenko, L., Machulin, I., Manuzio, G., Marcocci, S., Maricic, J., Mention, G., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Muratova, V., Musenich, R., Neumair, B., Oberauer, L., Opitz, B., Orekhov, V., Ortica, F., Pallavicini, M., Papp, L., Penek, Oe, Pilipenko, N., Pocar, A., Porcelli, A., Ranucci, G., Razeto, A., Re, A., Redchuk, M., Romani, A., Roncin, R., Rossi, N., Rottenanger, S., Schoenert, S., Scola, L., Semenov, D., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Trantel, A., Unzhakov, E., Veyssiere, C., Vishneva, A., Vivier, M., Vogelaar, R. B., von Feilitzsch, F., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
Physics, neutrino: sterile: search for, History, Sterile neutrino, Particle physics, 010308 nuclear & particles physics, Initial activity, sensitivity, 01 natural sciences, Computer Science Applications, Education, PHYSICS, Physics and Astronomy (all), cesium, 0103 physical sciences, OSCILLATIONS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, Borexino, proposed experiment, Neutrino, 010306 general physics, antineutrino: particle source, talk: Moscow 2017/10/02
Abstract

International audience; The third phase of the Borexino experiment that’s referred to as SOX is devoted to test the hypothesis of the existence of one (or more) sterile neutrinos at a short baseline (~5–10m). The experimental measurement will be made with artificial sources namely with a 144Ce–144Pr antineutrino source at the first stage (CeSOX) and possibly with a 51Cr neutrino source at the second one. The fixed 144Ce–144Pr sample will be placed beneath the detector in a special pit and the initial activity will be about 100 – 150 kCi. The start of data taking is scheduled for April 2018. The article gives a short description of the preparation for the first stage and shows the expected sensitivity.

Published
2017

42. Discovery probability of next-generation neutrinoless double- β decay experiments

Author

J. A. Detwiler, Giovanni Benato, and Matteo Agostini

Subjects
Physics, Particle physics, Antiparticle, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Bayesian probability, Observable, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Phenomenology, MAJORANA, 0103 physical sciences, Probability distribution, High Energy Physics::Experiment, Sensitivity (control systems), Neutrino, 010306 general physics, Neutrino oscillation, Nuclear Experiment
Abstract

The Bayesian discovery probability of future experiments searching for neutrinoless double-$\beta$ decay is evaluated under the popular assumption that neutrinos are their own antiparticles. A Bayesian global fit is performed to construct a probability distribution for the effective Majorana mass, the observable of interest for these experiments. This probability distribution is then combined with the sensitivity of each experiment derived from a heuristic counting analysis. The discovery probability is found to be higher than previously considered, but strongly depends on whether the neutrino mass ordering is normal or inverted. For the inverted ordering, next-generation experiments are likely to observe a signal already during their first operational stages. Even for the normal ordering, in the absence of neutrino mass mechanisms that drive the lightest state or the effective Majorana mass to zero, the probability of discovering neutrinoless double-$\beta$ decay can reach $\sim$50% or more in the most promising experiments., Comment: 13 pages, 7 figures. Version accepted for publication in Phys. Rev. D

Published
2017

43. Recent Borexino results and perspectives of the SOX measurement

Author

J. Martyn, E. Litvinovich, G. Mention, N. Rossi, F. Lombardi, I. N. Machulin, K. Altenmüller, N. Jonquères, B. Opitz, Marco Pallavicini, D. D'Angelo, Xuefeng Ding, G. Testera, A. Porcelli, G. Bellini, D. Bravo, Denis Korablev, M. M. Wojcik, J. Thurn, R. Roncin, M. D. Skorokhvatov, A. V. Derbin, S. Farinon, Y. Suvorov, Livia Ludhova, Michael Wurm, M. Gschwender, A. M. Goretti, A. S. Chepurnov, O. Zaimidoroga, S. Marcocci, H. Wang, E. V. Hungerford, Lino Miramonti, D. Franco, L. Papp, V. V. Kobychev, C. Ghiano, S. Appel, Caren Hagner, M. Toropova, Z. Yokley, V. Atroshchenko, S. Weinz, D. Kryn, R. B. Vogelaar, D. A. Semenov, Andrea Ianni, M. Misiaszek, Kai Zuber, D. Bick, Sandra Zavatarelli, Thierry Lasserre, B. Caccianiga, I. S. Drachnev, R. Tartaglia, A. Sotnikov, Aldo Ianni, Matteo Agostini, Lothar Oberauer, S. Caprioli, Matthias Laubenstein, Alessandra Re, P. Cavalcante, A. Caminata, Gioacchino Ranucci, Fausto Ortica, F. Gabriele, L. Lukyanchenko, Paolo Lombardi, N. Pilipenko, D. Basilico, F. Froborg, V. Kornoukhov, E. Meroni, K. Choi, G. Bonfini, Frank Calaprice, A. Razeto, J. Maricic, J. Gaffiot, R. Musenich, Tobias Lachenmaier, Marco Giammarchi, S. Rottenanger, V. N. Muratova, M. Scola, S. Schönert, M. Gromov, T. Houdy, M. Carlini, D. Jeschke, G. Zuzel, B. Neumair, M. Meyer, K. Fomenko, Andrey Formozov, F. von Feilitzsch, A. Vishneva, A. Jany, O. Cloué, G. Korga, M. Vivier, Cristiano Galbiati, M. Durero, L.F.F. Stokes, Z. Bagdasarian, C. Veyssiere, Jay Burton Benziger, M. Cribier, O. Smirnov, G. Lukyanchenko, E. V. Unzhakov, V. Fischer, A. Di Ludovico, G. Manuzio, A. Pocar, S. Davini, Aldo Romani, L. Di Noto, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Borexino/SOX, Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
Sterile neutrino, neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, QC1-999, scintillation counter: liquid, anomaly, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Standard Model, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear fusion, 010306 general physics, Neutrino oscillation, Borexino, Physics, gallium, 010308 nuclear & particles physics, Star formation, star: formation, stability, neutrino: sterile, sensitivity, beryllium, Gran Sasso, LSND, electron: lifetime, High Energy Physics::Experiment, neutrino: oscillation, nuclear reactor, Neutrino, neutrino: geophysics, talk: Kolymbari 2017/08/17, experimental results
Abstract

International audience; Borexino is a liquid scintillator detector sited underground in the Laboratori Nazionali del Gran Sasso (Italy). Its physics program, until the end of this year, is focussed on the study of solar neutrinos, in particular from the Beryllium, pp, pep and CNO fusion reactions. Knowing the reaction chains in the sun provides insights towards physics disciplines such as astrophysics (star physics, star formation, etc.), astroparticle and particle physics. Phase II started in 2011 and its aim is to improve the phase I results, in particular the measurements of the neutrino fluxes from the pep and CNO processes. By the end of this year, data taking from the sun will be over and a new project is scheduled to launch: Short distance Oscillation with boreXino (SOX), which uses a Cerium source for neutrinos (100÷150 kCi of activity) and aims to confirm or rule out the presence of sterile neutrinos. This particle is hypothesised to justify the reactor, Gallium and LSND anomalies found and can reject extensions to the standard model. The work presented is a summary of the solar neutrino results achieved so far, which lead not only to a precise study of the processes in the sun, but also to more Standard Model oriented measurements (such as the stability of the charge, i.e. the life time of the electron). Furthermore, the perspectives of the SOX program are discussed showing the experiment sensitivity to a fourth neutrino state covering almost entirely 3σ of the preferred region of the anomalous neutrino experiments, and additional applications of the detector such as the study of geo-neutrinos.

Published
2017

44. The Monte Carlo simulation of the Borexino detector

Author

G. Manuzio, Maurizio Canepa, M. Goeger-Neff, I. S. Drachnev, Y. Suvorov, J. Thurn, D. Franco, A. Pocar, Matthias Laubenstein, Manuel Meyer, R. Roncin, Livia Ludhova, Paolo Lombardi, Jay Burton Benziger, A. Jany, D. Basilico, A. M. Goretti, A. S. Chepurnov, J. Martyn, E. Litvinovich, Marcin Wójcik, O. Zaimidoroga, M. D. Skorokhvatov, N. Rossi, H. Wang, Kai Zuber, E. Meroni, A. Vishneva, B. Opitz, D. Jeschke, L.F.F. Stokes, V. V. Kobychev, Michael Wurm, E. V. Hungerford, O. Smirnov, Xuefeng Ding, Z. Yokley, Lino Miramonti, S. Schönert, D. Bravo, V. Atroshchenko, E. V. Unzhakov, A. V. Derbin, C. Ghiano, A. Sotnikov, Aldo Ianni, P. Shakina, Caren Hagner, G. Testera, G. Lukyanchenko, Cristiano Galbiati, K. Choi, Lothar Oberauer, Z. Bagdasarian, K. Fomenko, D. Kryn, Gioacchino Ranucci, Matteo Agostini, M. Gromov, R. Tartaglia, Aldo Romani, V. N. Muratova, T. Houdy, L. Di Noto, F. Lombardi, D. Bick, Andrea Ianni, Sandra Zavatarelli, P. Cavalcante, Michele Magnozzi, M. Misiaszek, D. A. Semenov, G. Zuzel, G. Bellini, S. Caprioli, Marco Giammarchi, D. Korablev, G. Bonfini, Frank Calaprice, Alessandra Re, S. Davini, F. Froborg, R. B. Vogelaar, I. N. Machulin, L. Papp, Fausto Ortica, Marco Pallavicini, D. D'Angelo, M. Carlini, B. Neumair, Andrey Formozov, F. von Feilitzsch, S. Appel, G. Korga, B. Caccianiga, A. Caminata, F. Gabriele, A. Razeto, S. Weinz, S. Marcocci, L. Borodikhina, M. Toropova, K. Altenmüller, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Borexino, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Agostini, M, Suvorov, Y, and Al., Et

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Solar neutrino, Monte Carlo method, scintillation counter: liquid, Solar neutrinos, energy resolution, 01 natural sciences, 7. Clean energy, Large volume liquid scintillator detector, High Energy Physics - Experiment, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Large volume liquid scintillator detectors, Borexino, Physics, photomultiplier, track data analysis, Detector, efficiency: quantum, ddc:540, GEANT, Neutrino, photon: yield, numerical calculations: Monte Carlo, Photomultiplier, data analysis method, energy loss, Scintillator, programming, photon: reflection, Monte Carlo simulations, Nuclear physics, 0103 physical sciences, photon: scattering, [INFO]Computer Science [cs], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, background: radioactivity, Monte Carlo simulation, detector: design, Scintillation, 010308 nuclear & particles physics, bibliography, Astronomy and Astrophysics, calibration, attenuation: length, pile-up, electronics: readout
Abstract

We describe the Monte Carlo (MC) simulation package of the Borexino detector and discuss the agreement of its output with data. The Borexino MC 'ab initio' simulates the energy loss of particles in all detector components and generates the resulting scintillation photons and their propagation within the liquid scintillator volume. The simulation accounts for absorption, reemission, and scattering of the optical photons and tracks them until they either are absorbed or reach the photocathode of one of the photomultiplier tubes. Photon detection is followed by a comprehensive simulation of the readout electronics response. The algorithm proceeds with a detailed simulation of the electronics chain. The MC is tuned using data collected with radioactive calibration sources deployed inside and around the scintillator volume. The simulation reproduces the energy response of the detector, its uniformity within the fiducial scintillator volume relevant to neutrino physics, and the time distribution of detected photons to better than 1% between 100 keV and several MeV. The techniques developed to simulate the Borexino detector and their level of refinement are of possible interest to the neutrino community, especially for current and future large-volume liquid scintillator experiments such as Kamland-Zen, SNO+, and Juno.

Published
2017

45. First Results of Gerda Phase II

Author

Manfred Lindner, Valerio D'Andrea, Stefan Schönert, Laura Baudis, Matteo Agostini, Giovanni Benato, and Alexander Kish

Subjects
Nuclear physics, Physics, chemistry, Phase (waves), chemistry.chemical_element, Half-life, Germanium, Data release, Energy (signal processing), Lower limit, Semiconductor detector
Abstract

The GErmanium Detector Array (GERDA ) experiment, located at the Laboratori Nazionali del Gran Sasso, searches for the 0νββ decay of $^{76}$Ge. GERDA Phase II was started in December 2015, aiming to reach a sensitivity on the 0νββ decay half-life larger than 10$^{26}$ yr in three yr of data taking with about 100 kg·yr exposure with background index of about 10$^{−3}$ cts/(keV·kg·yr). The major upgrade of Phase II is the deployment of thirty newly produced Broad Energy Germanium detectors. They contribute to the background reduction with better energy resolution and enhanced pulse shape discrimination. To achieve the necessary background reduction, the setup was complemented with LAr veto. After 6 months of operation a first data release with 10.8 kg·yr exposure was performed, showing that the background goal has been achieved. A new lower limit on the 0νββ decay half life of Ge-76 of 5.3 · 10$^{25}$ yr (90% C.L.) has been set.

Published
2017

46. Borexino: geo-neutrino measurement at Gran Sasso, Italy

Author

Cristian Galbiati, Serguei Sukhotin, Michele Montuschi, Fausto Ortica, Ilya Drachnev, Alessandra Re, A. Caminata, G. Bellini, M. S. Meyer, Aldo Ianni, Aldo Romani, Karol Jedrzejczak, Matteo Agostini, Alexander Etenko, D. Franco, D. A. Semenov, A. Sotnikov, Lino Miramonti, Szymon Manecki, E. Hungerford, Paolo Lombardi, I. N. Machulin, N. Rossi, Z. Yokley, Marco Pallavicini, Andrey Formozov, Andrea Ianni, D. Bick, Sandra Zavatarelli, D. D'Angelo, M. D. Skorokhvatov, Michael Wurm, A. Vishneva, E. V. Unzhakov, M. Obolensky, E. Litvinovich, S. Appel, Lea Di noto, Robert Bruce Vogelaar, L. Papp, Marco Giammarchi, Lothar Oberauer, Marianne Goeger-Neff, Gioacchino Ranucci, Matthias Laubenstein, D. Bravo, Jay Burton Benziger, O. Zaimidoroga, Denis Korablev, B. Caccianiga, B. Neumair, S. Davini, G. Korga, E. Meroni, W. Maneschg, V. V. Kobychev, K. Fomenko, P. J. Mosteiro, Franz von Feilitzsch, G. Lukyanchenko, G. Zuzel, G. Bonfini, D. Kryn, A. Pocar, Frank Calaprice, K. Altenmueller, Livia Ludhova, Laura Perasso, Y. Suvorov, A. S. Chepurnov, Hardy Simgen, J. Thurn, R. Roncin, Hongwei Wang, V. N. Muratova, Marcin Wójcik, Juergen Winter, G. Testera, C. Ghiano, Caren Hagner, Roberto Tartaglia, P. Cavalcante, M. Misiaszek, M. Gromov, A. Razeto, F. Gabriele, S. Marcocci, M. Toropova, A. V. Derbin, Kai Zuber, Bjoern Lehnert, F. Lombardi, Oleg Smirnov, D. Jeschke, S. Schoenert, A. M. Goretti, S. Weinz, Agostini, Matteo, Altenmueller, Konrad, Appel, Simon, Bellini, Gianpaolo, Benziger, Jay, Bick, Daniel, Bonfini, Giuseppe, Bravo, David, Caccianiga, Barbara, Calaprice, Frank, Caminata, Alessio, Cavalcante, Paolo, Chepurnov, Alexander, D'Angelo, Davide, Davini, Stefano, Derbin, Alexander, Di Noto, Lea, Drachnev, Ilya, Etenko, Alexander, Fomenko, Kirill, Formozov, Andrey, Franco, Davide, Gabriele, Federico, Galbiati, Cristian, Ghiano, Chiara, Giammarchi, Marco, Goeger-Neff, Marianne, Goretti, Augusto, Gromov, Maxim, Hagner, Caren, Hungerford, Ed, Ianni, Aldo, Ianni, Andrea, Jedrzejczak, Karol, Jeschke, Dominik, Kobychev, Vladislav, Korablev, Deni, Korga, Gyorgy, Kryn, Didier, Laubenstein, Matthia, Lehnert, Bjoern, Litvinovich, Evgeny, Lombardi, Francesco, Lombardi, Paolo, Ludhova, Livia, Lukyanchenko, Georgy, Machulin, Igor, Manecki, Szymon, Maneschg, Werner, Marcocci, Simone, Meroni, Emanuela, Meyer, Mikko, Miramonti, Lino, Misiaszek, Marcin, Montuschi, Michele, Mosteiro, Pablo, Muratova, Valentina, Neumair, Birgit, Oberauer, Lothar, Obolensky, Michel, Ortica, Fausto, Pallavicini, Marco, Papp, Laszlo, Perasso, Laura, Pocar, Andrea, Ranucci, Gioacchino, Razeto, Alessandro, Re, Alessandra, Romani, Aldo, Roncin, Romain, Rossi, Nicola, Schoenert, Stefan, Semenov, Dmitrii, Simgen, Hardy, Skorokhvatov, Mikhail, Smirnov, Oleg, Sotnikov, Albert, Sukhotin, Serguei, Suvorov, Yury, Tartaglia, Roberto, Testera, Gemma, Thurn, Jan, Toropova, Maria, Unzhakov, Evgenii, Vishneva, Alina, Vogelaar, Robert Bruce, von Feilitzsch, Franz, Wang, Hanguo, Weinz, Stefan, Winter, Juergen, Wojcik, Marcin, Wurm, Michael, Yokley, Zachary, Zaimidoroga, Oleg, Zavatarelli, Sandra, Zuber, Kai, and Zuzel, Grzegorz

Subjects
FLUX, Particle physics, Neutrino oscillation, Physics::Instrumentation and Detectors, Solar neutrinos, liquid scintillators, Geoneutrino, earth, Solar neutrino, 01 natural sciences, Physics::Geophysics, Geoneutrinos, 0103 physical sciences, EARTH, 010306 general physics, Borexino, Low background, Physics, Liquid, neutrino oscillations, 010308 nuclear & particles physics, Neutrino oscillations, Liquid scintillators, scintillator, flux, Geophysics, solar neutrinos, low background, High Energy Physics::Experiment, Neutrino, geoneutrinos
Abstract

Geo-neutrinos, electron anti-neutrinos produced in beta-decays of naturally occurring radioactive isotopes in the Earth, are a unique direct probe of our planet's interior. After a brief introduction of the geo-neutrinos' properties and of the main aims of their study, we discuss the features of a detector which has recently provided breakthrough achievements in the field, Borexino, a massive, calorimetric liquid scintillator detector installed at the underground Gran Sasso Laboratory. With its unprecedented radiopurity levels achieved in the core of the detection medium, it is the only experiment in operation able to study in real time solar neutrino interactions in the challenging sub-MeV energy region. Its superior technical properties allowed Borexino also to provide a clean detection of terrestrial neutrinos. Therefore, the description of the characteristics of the detected geo-neutrino signal and of the corresponding geological implications are the main core of the discussion contained in this work.

Published
2017

47. Search for Neutrinoless Double Beta Decay with the GERDA experiment: Phase II

Author

Christian Bauer, A. Lubashevskiy, Oliver Schulz, Alberto Pullia, V. I. Gurentsov, I. R. Barabanov, M. Heisel, C. Macolino, A. Garfagnini, S. V. Zhukov, M. Balata, Bayarto Lubsandorzhiev, J. Schreiner, L. Vanhoefer, T. Bode, E. Doroshkevich, R. Brugnera, M. Salathe, V. V. Kazalov, V. V. Kuzminov, J. Janicsko, Manfred Lindner, T. Wester, Matteo Agostini, A.A. Smolnikov, D. R. Zinatulina, Matthias Laubenstein, C. Cattadori, Kai Zuber, Allen Caldwell, Ivano Lippi, V. Egorov, Josef Jochum, D. Palioselitis, A. Kish, S. Schoenert, K. N. Gusev, A. K. Schuetz, E. Medinaceli, V. Wagner, O. Selivanenko, J. Janicskó Csáthy, Marcin Wójcik, V. D'Andrea, W. Maneschg, C. Gooch, E. A. Yanovich, K. T. Knoepfle, Cinzia Sada, P. Grabmayr, Stefano Riboldi, A. A. Vasenko, K. von Sturm, Giovanni Benato, A. Lazzaro, A. Domula, A. Hegai, E. V. Demidova, Mikael Hult, I. Zhitnikov, M. Misiaszek, B. Schwingenheuer, B. Lehnert, G. Zuzel, C. Wiesinger, R. Mingazheva, M. Shirchenko, M. Allardt, N. Di Marco, V. I. Lebedev, V.B. Brudanin, Hardy Simgen, V. N. Kornoukhov, K. Pelczar, S. Hemmer, Alessandro Bettini, P. Moseev, Luciano Pandola, R. Kneissl, A. Kirsch, S. Belogurov, A. A. Klimenko, Laura Baudis, A. V. Veresnikova, J. Hakenmüller, Guillaume Lutter, A. M. Bakalyarov, D. Borowicz, A. Chernogorov, N. Rumyantseva, K. Panas, B. Schneider, H. Y. Liao, Werner Hofmann, R. Falkenstein, I. V. Kirpichnikov, Luca Stanco, C. Schmitt, M. Miloradovic, A. Wegmann, Igor Nemchenok, F. Salamida, Bela Majorovits, M. Junker, L. B. Bezrukov, E. Shevchik, Thomas Kihm, E. Bellotti, N. Frodyma, O.I. Kochetov, S. T. Belyaev, A. M. Gangapshev, and L. V. Inzhechik

Subjects
Nuclear physics, Physics, chemistry, Double beta decay, Liquid argon, Underground laboratory, Phase (waves), chemistry.chemical_element, Germanium, Sensitivity (control systems), Energy (signal processing), Semiconductor detector
Abstract

The GERmanium Detector Array (GERDA) experiment, located at the Gran Sasso underground laboratory in Italy, is built for the search of $0\nu\beta\beta$ decay in $^{76}$Ge. GERDA operates bare high purity germanium detectors submersed in liquid Argon (LAr). Phase I of the experiment was completed reaching an exposure of about 21 kg$\cdot$yr with a background level of $10^{-2}$ cts/(ke V $\cdot$ kg $\cdot$ yr). GERDA Phase I set a limit on the $0\nu\beta\beta$ decay of $^{76}$Ge of $T_{1/2}^{0\nu} > 2.1 \cdot 10^{25}$ yr. In Phase II 35 kg of germanium detectors enriched in $^{76}$Ge are operated to reach an exposure of 100 kg$\cdot$yr. The design goal is to reduce the background by one order of magnitude to reach the sensitivity for $T_{1/2}^{0\nu} = \mathcal{O} (10^{26} )$ yr. The Phase II setup comprises thirty newly produced Broad Energy Germanium (BEGe) detectors. They contribute to the background reduction with better energy resolution and enhanced pulse shape discrimination. To achieve the necessary background reduction, the setup was complemented with LAr veto. The hardware upgrade for Phase II was finished and all detectors were deployed in December 2015. We present the first results of Phase II with 10.8 kg$\cdot$yr exposure reached in June 2016.

Published
2017

48. Borexino’s search for low-energy neutrino and antineutrino signals correlated with gamma-ray bursts

Author

Aldo Ianni, A.V. Etenko, M. Goeger-Neff, O. Smirnov, D. Bravo, J. Winter, Marco Giammarchi, D. Franco, R. Tartaglia, G. Lukyanchenko, E. V. Unzhakov, C. Ghiano, Caren Hagner, M. Misiaszek, Matthias Laubenstein, A. Jany, Matteo Agostini, P. Cavalcante, E. V. Hungerford, W. Maneschg, Cristiano Galbiati, Alessandra Re, A. Sotnikov, Marcin Wójcik, R. B. Vogelaar, P. J. Mosteiro, Andrea Ianni, D. Bick, Sandra Zavatarelli, Michele Montuschi, E. Meroni, F. Lombardi, G. Zuzel, A. Pocar, A. Razeto, M. Carlini, Z. Yokley, Kai Zuber, V. Atroshchenko, S. Schönert, D. Kryn, Lothar Oberauer, S. Manecki, H. de Kerret, G. Bellini, B. Neumair, I. S. Drachnev, K. Jedrzejczak, G. Manuzio, I. N. Machulin, K. Fomenko, D. Jeschke, Marco Pallavicini, D. D'Angelo, M. Gromov, B. Lehnert, E. Litvinovich, Jay Burton Benziger, N. Rossi, F. von Feilitzsch, S. Weinz, M. S. Meyer, S. Appel, L. Papp, G. Bonfini, D. A. Semenov, Frank Calaprice, K. Choi, S. Marcocci, Fausto Ortica, Paolo Lombardi, M. Toropova, S. V. Sukhotin, O. Zaimidoroga, H. Wang, V. V. Kobychev, Gioacchino Ranucci, B. Caccianiga, M. Obolensky, A. V. Derbin, V. N. Muratova, Lino Miramonti, K. Altenmüller, Denis Korablev, A. Caminata, A. Vishneva, F. Gabriele, G. Korga, Aldo Romani, L. Di Noto, G. Testera, Y. Suvorov, S. Davini, Livia Ludhova, A. M. Goretti, A. S. Chepurnov, J. Thurn, R. Roncin, M. D. Skorokhvatov, Michael Wurm, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), BOREXINO, AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Agostini, M., Suvorov, Y., Et, Al., Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
antineutrinos, electron, Antineutrinos, neutrino: solar, Physics::Instrumentation and Detectors, data acquisition, Solar neutrino, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Astrophysics::High Energy Astrophysical Phenomena, low energy/MeV neutrinos, Electron, gamma ray: burst, 01 natural sciences, Nuclear physics, Low energy/MeV neutrino, 0103 physical sciences, Neutrino, Low energy/MeV neutrinos, Neutrinos, Nuclear Experiment, 010303 astronomy & astrophysics, Gamma-ray burst, Borexino, scintillation counter, Physics, flavor, 010308 nuclear & particles physics, background, gamma-ray bursts, neutrinos, Gamma-ray bursts, Astronomy and Astrophysics, semileptonic decay, antineutrino, correlation: time, Neutrino detector, Inverse beta decay, ddc:540, Scintillation counter, readout, High Energy Physics::Experiment, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience; A search for neutrino and antineutrino events correlated with 2350 gamma-ray bursts (GRBs) is performed with Borexino data collected between December 2007 and November 2015. No statistically significant excess over background is observed. We look for electron antineutrinos ( ν¯e ) that inverse beta decay on protons with energies from 1.8 MeV to 15 MeV and set the best limit on the neutrino fluence from GRBs below 8 MeV. The signals from neutrinos and antineutrinos from GRBs that scatter on electrons are also searched for, a detection channel made possible by the particularly radio-pure scintillator of Borexino. We obtain currently the best limits on the neutrino fluence of all flavors and species below 7 MeV. Finally, time correlations between GRBs and bursts of events are investigated. Our analysis combines two semi-independent data acquisition systems for the first time: the primary Borexino readout optimized for solar neutrino physics up to a few MeV, and a fast waveform digitizer system tuned for events above 1 MeV.

Published
2017

49. Study of the GERDA Phase II background spectrum

Author

V. I. Gurentsov, R. Kneißl, V. G. Egorov, D. Palioselitis, V. D'Andrea, M. Balata, E. Shevzik, L. Vanhoefer, L. B. Bezrukov, V. B. Brudanin, M. Allardt, Matthias Laubenstein, A. V. Veresnikova, M. Salathe, M. Junker, M. M. Wojcik, C. Schmitt, R. Mingazheva, BayarJon Paul Lubsandorzhiev, V. Kazalov, C. Cattadori, B. Schwingenheuer, J. Janicskó Csáthy, A. Domula, R. Brugnera, A. Kish, L. V. Inzhechik, A. Lubashevskiy, A. Kirsch, Oliver Schulz, V. V. Kuzminov, Alessandro Bettini, V. Wagner, I. Zhitnikov, W. Maneschg, E. A. Yanovich, Matteo Agostini, Alberto Pullia, M. Miloradovic, A. Wegmann, C. Bauer, Igor Nemchenok, V. I. Lebedev, A. Garfagnini, Manfred Lindner, L. Stanco, Stefano Riboldi, Bela Majorovits, D. Borowicz, A. Chernogorov, E. Medinaceli, Allen Caldwell, Laura Baudis, I.V. Kirpichnikov, A.A. Vasenko, O. Selivanenko, I. R. Barabanov, B. Lehnert, S. V. Zhukov, Hardy Simgen, E.V. Demidova, S. Belogurov, M. Misiaszek, H. Y. Liao, K. Panas, D. R. Zinatulina, K. N. Gusev, K. T. Knöpfle, C. Gooch, K. von Sturm, E. Bellotti, A.-K. Schütz, Stefan Schönert, A. Hegai, N. Di Marco, E. Doroshkevich, F. Salamida, Cinzia Sada, Giovanni Benato, J. Hakenmüller, Ivano Lippi, C. Wiesinger, Werner Hofmann, Mikael Hult, M. Shirchenko, G. Zuzel, T. Bode, R. Falkenstein, Jochen Schreiner, S. Hemmer, K. Pelczar, Guillaume Lutter, B. Schneider, A. M. Bakalyarov, P. Grabmayr, J. Jochum, T. Wester, A.A. Smolnikov, A. Lazzaro, Kai Zuber, V.N. Kornoukhov, O.I. Kochetov, S. T. Belyaev, A. M. Gangapshev, Th. Kihm, P. Moseev, Luciano Pandola, A. A. Klimenko, M. Heisel, N. Rumyantseva, C. Macolino, and N. Frodyma

Subjects
Physics, History, Background spectrum, Physics and Astronomy (all), Phase (waves), Nuclear Matrix, Astrophysics, Beta Decay, Bolometers, Beta Decay, Bolometers, Nuclear Matrix, Computer Science Applications, Education
Published
2017

50. Limits on uranium and thorium bulk content in GERDA Phase I detectors

Author

V. N. Kornoukhov, K. Pelczar, Guillaume Lutter, A. M. Bakalyarov, K. Panas, R. Falkenstein, Jochen Schreiner, C. Schmitt, D. Palioselitis, V. G. Egorov, Allen Caldwell, K. T. Knöpfle, M. Salathe, T. Wester, O. Fedorova, V. I. Gurentsov, B. Lehnert, M. Balata, N. Frodyma, E. Medinaceli, L. Vanhoefer, K. von Sturm, T. Bode, A.A. Smolnikov, C. Cattadori, Kai Zuber, Laura Baudis, Cinzia Sada, Alessandro Bettini, O.I. Kochetov, Bayarto Lubsandorzhiev, A. Kish, R. Mingazheva, K. Freund, Marcin Wójcik, Stefano Riboldi, M. Junker, P. Grabmayr, H. Y. Liao, B. Schwingenheuer, Giovanni Benato, A.-K. Schütz, G. Zuzel, A. Hegai, S. T. Belyaev, V. D'Andrea, M. Misiaszek, C. Wiesinger, J. Jochum, A. M. Gangapshev, M. Shirchenko, V. V. Kazalov, E. V. Demidova, I. R. Barabanov, P. Moseev, Thomas Kihm, K. N. Gusev, D. R. Zinatulina, Luciano Pandola, V. I. Lebedev, A. A. Klimenko, S. V. Zhukov, M. Allardt, R. Brugnera, Stefan Schönert, L. B. Bezrukov, S. Belogurov, M. Heisel, Mikael Hult, E. Shevchik, V. V. Kuzminov, N. Rumyantseva, Matteo Agostini, Christian Bauer, A. Kirsch, A. Wegmann, Manfred Lindner, S. Hemmer, Igor Nemchenok, L. V. Inzhechik, A. Lubashevskiy, E. Doroshkevich, Bela Majorovits, W. Maneschg, A. Lazzaro, A. di Vacri, I. V. Kirpichnikov, Werner Hofmann, A. Domula, E. A. Yanovich, C. Macolino, M. Walter, B. Schneider, O. Selivanenko, R. Kneißl, Ivano Lippi, L. Stanco, V.B. Brudanin, N. Becerici-Schmidt, Hardy Simgen, E. Bellotti, D. Borowicz, M. Stepaniuk, J. Hakemüller, A. V. Veresnikova, J. Janicskó Csáthy, A. Chernogorov, I. Zhitnikov, F. Salamida, Oliver Schulz, Alberto Pullia, A. Garfagnini, Matthias Laubenstein, V. Wagner, A. A. Vasenko, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), GERDA, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Physics - Instrumentation and Detectors, radiopurity, Isotopes of germanium, germanium: double-beta decay, chemistry.chemical_element, FOS: Physical sciences, double beta decay, Germanium, Radiopurity, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Uranium and thorium, germanium detectors, Nuclear physics, Double beta decay, 0103 physical sciences, thorium: admixture, germanium: detector, Nuclide, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), uranium and thorium bulk content, 010306 general physics, Nuclear Experiment, background: radioactivity, Physics, Range (particle radiation), 010308 nuclear & particles physics, uranium: admixture, Thorium, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Uranium, Germanium detectors, Uranium and thorium bulk content, chemistry, radioactivity, bulk content, DOUBLE-BETA DECAY, Decay chain, GERDA
Abstract

Internal contaminations of $^{238}$U, $^{235}$U and $^{232}$Th in the bulk of high purity germanium detectors are potential backgrounds for experiments searching for neutrinoless double beta decay of $^{76}$Ge. The data from GERDA Phase~I have been analyzed for alpha events from the decay chain of these contaminations by looking for full decay chains and for time correlations between successive decays in the same detector. No candidate events for a full chain have been found. Upper limits on the activities in the range of a few nBq/kg for $^{226}$Ra, $^{227}$Ac and $^{228}$Th, the long-lived daughter nuclides of $^{238}$U, $^{235}$U and $^{232}$Th, respectively, have been derived. With these upper limits a background index in the energy region of interest from $^{226}$Ra and $^{228}$Th contamination is estimated which satisfies the prerequisites of a future ton scale germanium double beta decay experiment., Comment: 2 figures, 7 pages

Published
2017

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