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1. Axion search with BabyIAXO in view of IAXO

Author

Pierre Brun, A. Marin-Franch, S. Aune, C. Iñiguez, G. Luzón, D. Díez, Y. Giomataris, L. Obis, Nikolai Golubev, Igor Tkachev, G. Pareschi, S. Rueda-Teruel, B. Biasuzzi, D. Unger, Marta Civitani, O. Limousin, L. Kravchuk, A. Abeln, K. Altenmüller, Walter Wuensch, Ulrich Werthenbach, Sergey Troitsky, N. Bykovskiy, J.P. Mols, Sergei Gninenko, J. Golm, L. Dumoulin, Amanda Weltman, Matthias Mentink, C. Nones, Krešimir Jakovčić, I. Lomskaya, Javier Redondo, J. Vogel, J. Ruz, I. Drachnev, M. J. Pivovaroff, D.V. Poda, Jordi Miralda-Escudé, Javier Galan, Loredana Gastaldo, T. Lasserre, C. Malbrunot, I. G. Irastorza, Lars Hagge, Nikita Ushakov, P. L. Henriksen, Joan Mauricio, D. Calvet, E. Ruiz-Choliz, V. Chernov, A. Ortiz de Solórzano, T. Papaevangelou, K. Perez, BayarJon Paul Lubsandorzhiev, S. Marnieros, R. Iglesias-Marzoa, J. F. Castel, H. P. Pais Da Silva, S. Schmidt, H. Ten Kate, S. Cebrián, Fabrizio Tavecchio, A. A. Nozik, F. J. Iguaz-Gutierrez, Finn Erland Christensen, Y. Menesguen, David Gascon, T. Schiffer, P. Laurent, V. S. Pantuev, M. R.D. Rodrigues, D. Hengstler, David Attié, C. Margalejo, J. M. Carmona, Jordi Salvado, B. Kanoute, F. Marutzky, Stefano Basso, T. Dafni, S. Arguedas Cuendis, Alexey Dudarev, C. Oriol, S. Oster, Luc Bergé, G. López-Alegre, J. Hahn, Biljana Lakić, U. Schneekloth, H. Mirallas, Maurizio Giannotti, E. Ferrer-Ribas, Charles J. Hailey, X-F. Navick, F. Rueda-Teruel, A. V. Derbin, E. O. Saemann, E. Armengaud, E. Picatoste, Federico Mescia, V. Muratova, Martin Loidl, O. Pérez, D. Voronin, P. Borges de Sousa, K. Ludwig, Klaus Kurt Desch, Babette Döbrich, S. Karstensen, D. D. M. Ferreira, L. Segui, Andreas Ringwald, C. Cogollos, A. Yanes-Díaz, Ivor Fleck, F. Orsini, A. Giuliani, Matthias Schott, Jochen Kaminski, Alessio Notari, M. Dinter, E. Unzhakov, A. Lindner, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Heidelberg University, University of Zaragoza - Universidad de Zaragoza [Zaragoza], European Organization for Nuclear Research (CERN), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Moscow Institute of Physics and Technology [Moscow] (MIPT), Danmarks Tekniske Universitet = Technical University of Denmark (DTU), Universitat de Barcelona (UB), National Research Center 'Kurchatov Institute' (NRC KI), Rheinische Friedrich-Wilhelms-Universität Bonn, Deutsches Elektronen-Synchrotron [Hamburg] (DESY), National Space Institute [Lyngby] (DTU Space), University of Siegen, Kirchhoff Institute for Physics, University of Heidelberg, Dept Phys Sci - Barry University, Barry University, Institute for Nuclear Research of Russian Academy of Sciences (INR), Russian Academy of Sciences [Moscow] (RAS), Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], Universität Siegen [Siegen], Kirchhoff Institute for Physics, Universität Heidelberg [Heidelberg] = Heidelberg University, Centro de Estudios de Física del Cosmos de Aragón, Rudjer Boskovic Institute [Zagreb], Laboratoire National Henri Becquerel (LNHB), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département d'instrumentation Numérique (DIN (CEA-LIST)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institució Catalana de Recerca i Estudis Avançats (ICREA), Massachusetts Institute of Technology (MIT), SLAC National Accelerator Laboratory (SLAC), Stanford University, Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University (JGU), Lawrence Livermore National Laboratory (LLNL), University of Cape Town, IAXO collaboration, Technical University of Denmark [Lyngby] (DTU), Universität Heidelberg [Heidelberg], Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), and Johannes Gutenberg - Universität Mainz (JGU)

Subjects
Particle physics, Physics - Instrumentation and Detectors, solar axion, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], experimental methods, Dark matter, FOS: Physical sciences, 7. Clean energy, String (physics), Standard Model, axion helioscope, design [detector], International Axion Observatory (IAXO), Observatory, Peccei-Quinn mechanism, Dark Matter, detector design, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, Axion, sun-tracking systems, physics.ins-det, activity report, detector: design, Physics, instrumentation, Helioscope, Large Hadron Collider, detector, solar [axion], DESY, Instrumentation and Detectors (physics.ins-det), [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], IAXO, magnet, optics, axion: solar
Abstract

Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for Dark Matter, and in addition, they would be copiously produced at the sun's core. A relevant effort during the last decade has been the CAST experiment at CERN, the most sensitive axion helioscope to-date. The International Axion Observatory (IAXO) is a large-scale 4th generation helioscope. As its primary physics goal, IAXO will look for solar axions or ALPs with a signal to background ratio of about 5 orders of magnitude higher than CAST. Recently the IAXO collaboration has proposed and intermediate experimental stage, BabyIAXO, conceived to test all IAXO subsystems (magnet, optics, detectors and sun-tracking systems) at a relevant scale for the final system and thus serve as pathfinder for IAXO but at the same time as a fully-fledged helioscope with record and relevant physics reach in itself with potential for discovery. BabyIAXO was endorsed by the Physics Review committee of DESY last May 2019. Here we will review the status and prospects of BabyIAXO and its potential to probe the most physics motivated regions of the axion & ALPs parameter space., 6 pages, ICHEP 2020 Virtual conference

Published
2020
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2. Imaging in (high pressure) Micromegas TPC detectors

Author

T. Dafni, E. Ruiz-Choliz, S. Cebrián, I. G. Irastorza, J. F. Castel, F.J. Iguaz, H. Mirallas, Javier Galan, J. G. Garza, and G. Luzón

Subjects
Physics, Particle physics, Time projection chamber, 010308 nuclear & particles physics, Dark matter, MicroMegas detector, 01 natural sciences, Particle detector, 030218 nuclear medicine & medical imaging, Nuclear physics, 03 medical and health sciences, 0302 clinical medicine, Double beta decay, 0103 physical sciences, Neutron detection, CERN Axion Solar Telescope, Instrumentation, Axion, Mathematical Physics
Abstract

The T-REX project of the group of the University of Zaragoza includes a number of R&D and prototyping activities to explore the applicability of gaseous Time Projection Chambers (TPCs) with Micromesh Gas Structures (Micromegas) in rare event searches where the pattern recognition of the signal is crucial for background discrimination. In the CAST experiment (CERN Axion Solar Telescope) a background level as low as 0.8 × 10−6 counts keV−1 cm−2 s−1 was achieved. Prototyping and simulations promise a 105 better signal-to-noise ratio than CAST for the future IAXO (International Axion Observatory) using x-ray telescopes. A new strategy is also explored in the search of WIMPS based on high gas pressure: the TREX-DM experiment, a low energy threshold detector. In both cases, axion and WIMP searches, the image of the expected signal is quite simple: a one cluster deposition coming from the magnet bore in the case of axions and, if possible, with a tadpole form in the case of WIMPs. It is the case of double beta decay (DBD) where imaging and pattern recognition play a major role. Results obtained in Xe + trimethylamine (TMA) mixture point to a reduction in electron diffusion which improves the quality of the topological pattern, with a positive impact on the discrimination capability, as shown in TREX-ββ prototype. Microbulk Micromegas are able to image the DBD ionization signature with high quality while, at the same time, measuring its energy deposition with a resolution of at least a ~ 3% FWHM at the transition energy Qββ and even better (up to ~ 1% FWHM) as extrapolated from low energy events. That makes Micromegas-based HPXe TPC a very competitive technique for the next generation DBD experiments (as PANDAX-III). Here, it will be shown the last results of the TREX project detectors and software concerning Axions, Dark matter and double beta decay.

Published
2019

3. An update on the Axion Helioscopes front: current activities at CAST and the IAXO project

Author

Joachim Jacoby, J. I. Collar, H. Ten Kate, Fritz Caspers, Julia Vogel, J. Kaminski, H. Silva, Giovanni Cantatore, Benito Gimeno, S. C. Yildiz, M. Betz, Alexey Dudarev, Georg G. Raffelt, A. Belov, F.J. Iguaz, Rainer Kotthaus, Javier Redondo, F. Haug, K. Barth, G. Luzón, Klaus Kurt Desch, C. Eleftheriadis, S. Caspi, P. Brax, Georgios Fanourakis, W. C. Wester, Hector Gomez, J. M. Laurent, N. Breijnholt, I. Dratchnev, Toyokazu Sekiguchi, S. Neff, L. Stewart, Joerg Jaeckel, Amanda Weltman, Marin Karuza, C. Krieger, Pierre Sikivie, A. Tomás, S. Aune, C. Nones, Heinrich Bräuninger, Serkant Ali Cetin, M. Rosu, I. G. Irastorza, J. M. Carmona, Babette Döbrich, Krešimir Jakovčić, Steffen Hauf, Takashi Hiramatsu, Biljana Lakić, Milica Krčmar, Evangelos Gazis, M. Davenport, Dieter H. H. Hoffmann, T. Papaevangelou, J.A. Villar, A. V. Derbin, Ante Ljubičić, Dieter Horns, S. N. Gninenko, A. Diago, I. Ortega, S. Matsuki, E. Gruber, Sergey Troitsky, T. Dafni, J. G. Garza, I. Savvidis, Andreas Ringwald, A. Lindner, Jordi Isern, M. Arik, Javier Galan, Ken'ichi Saikawa, E. Georgiopoulou, T. Guthörl, Eduardo Guendelman, Adriane De Assis Lawisch Rodriguez, I. Shilon, D. Chelouche, S. Russenschuck, Kenichi Imai, V. N. Muratova, P. Vedrine, F.E. Christensen, T. O. Niinikoski, E. Ferrer-Ribas, F. T. Avignone, Charles J. Hailey, M. D. Hasinoff, Peter Friedrich, M. J. Pivovaroff, Konstantin Zioutas, Sami K. Solanki, Louis Walckiers, H. Riege, Pierre Brun, Konstantinos Kousouris, Markus Kuster, A. Dael, T. Geralis, Gianpaolo Carosi, J. A. Garcia, A. Gardikiotis, Yannis K. Semertzidis, Eric Armengaud, Raimo Hartmann, Theodoros Vafeiadis, J. Ruz, K. Königsmann, Masahiro Kawasaki, D. González-Díaz, I. Giomataris, K. van Bibber, Olivier Limousin, A.C. Jakobsen, A. Liolios, Dafni, T, Arik, M., Armengaud, E., Aune, S., Avignone, F. T., Barth, K., Belov, A., Betz, M., Bräuninger, H., Brax, P., Breijnholt, N., Brun, P., Cantatore, Giovanni, Carmona, J. M., Carosi, G. P., Caspers, F., Caspi, S., Cetin, S. A., Chelouche, D., Christensen, F. E., Collar, J. I., Dael, A., Davenport, M., Derbin, A. V., Desch, K., Diago, A., Döbrich, B., Dratchnev, I., Dudarev, A., Eleftheriadis, C., Fanourakis, G., Ferrer Ribas, E., Friedrich, P., Galán, J., García, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Georgiopoulou, E., Geralis, T., Gimeno, B., Giomataris, I., Gninenko, S., Gómez, H., González Díaz, D., Gruber, E., Guendelman, E., Guthörl, T., Hailey, C. J., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M. D., Hiramatsu, T., Hoffmann, D. H. H., Horns, D., Iguaz, F. J., Irastorza, I. G., Isern, J., Imai, K., Jacoby, J., Jaeckel, J., Jakobsen, A. C., Jakovcić, K., Kaminski, J., Kawasaki, M., Karuza, M., Königsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Krieger, C., Kuster, M., Lakić, B., Laurent, J. M., Limousin, O., Lindner, A., Liolios, A., Ljubicić, A., Luzón, G., Matsuki, S., Muratova, V. N., Neff, S., Niinikoski, T., Nones, C., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Redondo, J., Riege, H., Ringwald, A., Rodríguez, A., Rosu, M., Russenschuck, S., Ruz, J., Saikawa, K., Savvidis, I., Sekiguchi, T., Semertzidis, Y. K., Shilon, I., Sikivie, P., Silva, H., Solanki, S. K., Stewart, L., ten Kate, H. H. J., Tomas, A., Troitsky, S., Vafeiadis, T., van Bibber, K., Vedrine, P., Villar, J. A., Vogel, J. K., Walckiers, L., Weltman, A., Wester, W., Yildiz, S. C., Zioutas, K., Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, Çetin, Serkant Ali, Arık, Metin, and Yıldız, Süleyman Cenk

Subjects
X-Ray Focusing Devices, X-ray detector, Particle physics, Nuclear and High Energy Physics, X-ray focusing device, Axions, Dark matter, Magnet Development, Micromegas detector, axions, dark matter, x-ray, detectors, micromegas detectors, x-ray focusing devices, magnet development, CAST, IAXO, 01 natural sciences, Axion, Primary (astronomy), Observatory, 0103 physical sciences, Dark Matter, X-Ray Detectors, 010306 general physics, Physics, Helioscope, Micromegas Detectors, 010308 nuclear & particles physics, Magnet development, Micromegas detectors, X-ray detectors, X-ray focusing devices, Orders of magnitude (time), Experimental methods, CERN Axion Solar Telescope
Abstract

Çetin, Serkant Ali (Dogus Author) -- Arık, Metin (Dogus Author) -- Yıldız, Süleyman Cenk (Dogus Author) Although they have not yet been detected, axions and axion-like particles (ALPs) continue to maintain the interest (even increasingly so) of the rare-event searches community as viable candidates for the Dark Matter of the Universe but also as a solution for several other puzzles of astrophysics. Their property of coupling to photons has inspired different experimental methods for their detection, one of which is the helioscope technique. The CERN Axion Solar Telescope (CAST) is the most sensitive helioscope built up to date and has recently published part of the latest data taken with the magnet bores gradually filled with He-3, probing the mass range up to 1.17 eV. The International AXion Observatory (IAXO) is being proposed as a facility where different axion studies can be performed, with the primary goal to study axions coming from the Sun. Designed to maximize sensitivity, it will improve the levels reached by CAST by almost 5 orders of magnitude in signal detection, that is more than one order of magnitude in terms of gay. Here we will summarize the most important aspects of the helioscopes, and focus mainly on IAXO, based on the recent papers [1, 2].

Published
2016
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4. Weighing the solar axion

Author

Ciaran A. J. O'Hare, Biljana Lakić, Javier Galan, Krešimir Jakovčić, G. Luzón, I. G. Irastorza, T. Dafni, F.J. Iguaz, Elisa Ruiz Chóliz, Javier Redondo, Synchrotron SOLEIL (SSOLEIL), and Centre National de la Recherche Scientifique (CNRS)

Subjects
Particle physics, solar axions, helioscope, axion mass, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Photon, Physics::Instrumentation and Detectors, energy resolution, FOS: Physical sciences, Inverse, 01 natural sciences, High Energy Physics::Theory, High Energy Physics - Phenomenology (hep-ph), Observatory, 0103 physical sciences, axion: coupling, 010306 general physics, Axion, Astroparticle physics, Physics, Helioscope, 010308 nuclear & particles physics, Oscillation, High Energy Physics::Phenomenology, photon, Observable, oscillation, suppression, sensitivity, magnet, coherence, High Energy Physics - Phenomenology, Beyond the standard model, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], spectral, axion-like particles, axion: mass, axion: solar, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Axion helioscopes search for solar axions and axion-like particles via inverse Primakoff conversion in strong laboratory magnets pointed at the Sun. While helioscopes can always measure the axion coupling to photons, the conversion signal is independent of the mass for axions lighter than around 0.02 eV. Masses above this value on the other hand have suppressed signals due to axion-photon oscillations which destroy the coherence of the conversion along the magnet. However, the spectral oscillations present in the axion conversion signal between these two regimes are highly dependent on the axion mass. We show that these oscillations are observable given realistic energy resolutions and can be used to determine the axion mass to within percent level accuracies. Using projections for the upcoming helioscope IAXO, we demonstrate that $>3\sigma$ sensitivity to a non-zero axion mass is possible between $3 \times 10^{-3}$ and $10^{-1}$ eV for both the Primakoff and axion-electron solar fluxes., Comment: 13 pages, 7 figures, matches published version, code available at http://cajohare.github.io/IAXOmass

Published
2019
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5. The Next Generation of Axion Helioscopes: The International Axion Observatory (IAXO)

Author

Javier Redondo, Biljana Lakić, Eduardo Guendelman, K. van Bibber, A. Diago, S. Matsuki, Hector Gomez, Marin Karuza, C. Eleftheriadis, Olivier Limousin, H. H. J. ten Kate, Eric Armengaud, T. Dafni, Finn Erland Christensen, I. Ortega, Pierre Sikivie, Anders Clemen Jakobsen, F.J. Iguaz, Charles J. Hailey, Diego González-Díaz, Theodoros Vafeiadis, Milica Krčmar, Takashi Hiramatsu, V. N. Muratova, Dieter H. H. Hoffmann, J.A. Villar, S. C. Yildiz, Klaus Kurt Desch, I. Shilon, B. Döbrich, Javier Galan, J. G. Garza, Pierre Brun, A. Dael, S. Gninenko, F. T. Avignone, A. Tomás, W. C. Wester, C. Krieger, I. G. Irastorza, Masahiro Kawasaki, A. Lindner, A. Dudarev, Andreas Ringwald, Michael J. Pivovaroff, M. Betz, A. V. Derbin, P. Brax, C. Nones, D. Chelouche, Ioannis Giomataris, I. Savvidis, Yannis K. Semertzidis, S. Russenschuck, Kenichi Imai, Konstantin Zioutas, Theodoros Geralis, Serkant Ali Cetin, Giovanni Cantatore, Julia Vogel, Jordi Isern, H. Silva, E. Ferrer-Ribas, Ken'ichi Saikawa, G. Luzón, Dieter Horns, P. Vedrine, G. Fanourakis, Toyokazu Sekiguchi, Fritz Caspers, J. A. Garcia, Joerg Jaeckel, Amanda Weltman, J. Ruz, M. Davenport, J. Kaminski, L. Walckiers, Krešimir Jakovčić, Gianpaolo Carosi, A. Liolios, B. Gimeno, Georg G. Raffelt, T. Papaevangelou, J. M. Carmona, S. Caspi, Konstantinos Kousouris, I. Dratchnev, Sergey Troitsky, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, Çetin, Serkant Ali, Vogel, J. K., Armengaud, E., Avignone, F. T., Betz, M., Brax, P., Brun, P., Cantatore, Giovanni, Carmona, J. M., Carosi, G. P., Caspers, F., Caspi, S., Cetin, S. A., Chelouche, D., Christensen, F. E., Dael, A., Dafni, T., Davenport, M., Derbin, A. V., Desch, K., Diago, A., Döbrich, B., Dratchnev, I., Dudarev, A., Eleftheriadis, C., Fanourakis, G., Ferrer Ribas, E., Galán, J., García, J. A., Garza, J. G., Geralis, T., Gimeno, B., Giomataris, I., Gninenko, S., Gómez, H., González Díaz, D., Guendelman, E., Hailey, C. J., Hiramatsu, T., Hoffmann, D. H. H., Horns, D., Iguaz, F. J., Irastorza, I. G., Isern, J., Imai, K., Jakobsen, A. C., Jaeckel, J., Jakovčić, K., Kaminski, J., Kawasaki, M., Karuza, M., Krčmar, M., Kousouris, K., Krieger, C., Lakić, B., Limousin, O., Lindner, A., Liolios, A., Luzón, G., Matsuki, S., Muratova, V. N., Nones, C., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Redondo, J., Ringwald, A., Russenschuck, S., Ruz, J., Saikawa, K., Savvidis, I., Sekiguchi, T., Semertzidis, Y. K., Shilon, I., Sikivie, P., Silva, H., ten Kate, H., Tomas, A., Troitsky, S., Vafeiadis, T., van Bibber, K., Vedrine, P., Villar, J. A., Walckiers, L., Weltman, A., Wester, W., Yildiz, S. C., and Zioutas, K.

Subjects
QCD axion, Particle physics, Physics::Instrumentation and Detectors, Dark matter, Physics and Astronomy(all), 01 natural sciences, 7. Clean energy, magnetic helioscope, High Energy Physics::Theory, QCD axions, Astroparticle Physics, Axion, Observatory, 0103 physical sciences, dark matter, Dark Matter, ddc:530, Detectors and Experimental Techniques, 010306 general physics, Astroparticle physics, Physics, Helioscope, 010308 nuclear & particles physics, Axion Dark Matter Experiment, High Energy Physics::Phenomenology, Strong CP problem, IAXO, Strong CP Problem, ALP, CERN Axion Solar Telescope, Particle Physics - Experiment, Helioscopes
Abstract

Çetin, Serkant Ali (Dogus Author) -- Conference full title: 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013; Asilomar Conference Grounds Monterey Peninsula; United States; 8 September 2013 through 13 September 2013. The International Axion Observatory (IAXO) is a proposed 4th-generation axion helioscope with the primary physics research goal to search for solar axions via their Primakoff conversion into photons of 1 - 10 keV energies in a strong magnetic field. IAXO will achieve a sensitivity to the axion-photon coupling gaγ down to a few ×10-12 GeV-1 for a wide range of axion masses up to ∼ 0.25 eV. This is an improvement over the currently best (3rd generation) axion helioscope, the CERN Axion Solar Telescope (CAST), of about 5 orders of magnitude in signal strength, corresponding to a factor ∼ 20 in the axion photon coupling. IAXO's sensitivity relies on the construction of a large superconducting 8-coil toroidal magnet of 20 m length optimized for axion research. Each of the eight 60 cm diameter magnet bores is equipped with x-ray optics focusing the signal photons into ∼ 0.2 cm2 spots that are imaged by very low background x-ray detectors. The magnet will be built into a structure with elevation and azimuth drives that will allow solar tracking for 12 hours each day. This contribution is a summary of our papers [1-3] and we refer to these for further details.

Published
2015
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6. New micromegas for axion searches in CAST

Author

Hector Gomez, S. Aune, I. G. Irastorza, G. Luzón, T. Geralis, T. Vafeiadis, J. Ruz, I. Giomataris, Georgios Fanourakis, A. Gardikiotis, A. Tomás, J. Morales, A Rodríguez, Javier Galan, S. C. Yildiz, T. Papaevangelou, T. Dafni, F.J. Iguaz, E. Ferrer-Ribas, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, and Yıldız, Süleyman Cenk

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Axions, Detector, X-ray detector, MicroMegas detector, Gas Micropattern Detectors, Low Background, 01 natural sciences, 0103 physical sciences, Cast, X-ray Detectors, 010306 general physics, Instrumentation, Axion, Micromegas
Abstract

Yıldız, Süleyman Cenk (Dogus Author) Micromegas detectors have been taking data in the CAST experiment since 2002, occupying one opening (out of the two looking for sunrise axions) of the magnet and showing good performance and stability. Currently, three of the four X-ray detectors used in the experiment are micromegas. The new detectors are of the Microbulk technology, which have attracted a lot of attention because of the advantages they present, among them the low-material construction, high radiopurity and good energy resolution. Here, their performance during the last year will be commented. In particular, the low background levels reached in some detectors have triggered a set of studies in order to understand the effect.

Published
2011
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7. New solar axion search using the CERN Axion Solar Telescope withHe4filling

Author

T. Papaevangelou, S. C. Yildiz, I. Savvidis, M. D. Hasinoff, Biljana Lakić, J. M. Carmona, I. Giomataris, A. Belov, Evangelos Gazis, T. O. Niinikoski, V. Burwitz, José Villar, L. Stewart, S. Neff, E. Da Riva, Theodoros Vafeiadis, J. Bremer, F.J. Iguaz, Ante Ljubičić, Dieter Hoffmann, Sami K. Solanki, M. Rosu, Markus Kuster, Sergei Gninenko, A. Tomás, T. Geralis, Krešimir Jakovčić, J. G. Garza, Joachim Jacoby, M. Gomez Marzoa, T. Dafni, Georgios Fanourakis, C. Eleftheriadis, M. Kavuk, M. J. Pivovaroff, Konstantin Zioutas, Julia Vogel, Heinrich Bräuninger, J. M. Laurent, Giovanni Cantatore, S. Aune, A. Liolios, Serkant Ali Cetin, K. Barth, G. Luzón, Milica Krčmar, M. Davenport, Marin Karuza, J. A. Garcia, I. Ortega, N. Elias, I. Shilon, Metin Arik, A. V. Dermenev, E. Georgiopoulou, Javier Galan, Georg G. Raffelt, I. G. Irastorza, J. Ruz, J. I. Collar, Adriane De Assis Lawisch Rodriguez, E. Ferrer-Ribas, A. Gardikiotis, and A. Nordt

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Photon, Dark matter, chemistry.chemical_element, Superconducting magnet, 7. Clean energy, chemistry, CERN Axion Solar Telescope, Axion, Helium, Line (formation)
Abstract

The CERN Axion Solar Telescope (CAST) searches for a -> gamma conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. Two parallel magnet bores can be filled with helium of adjustable pressure to match the x-ray refractive mass m(gamma) to the axion search mass m(a). After the vacuum phase (2003-2004), which is optimal for m(a) less than or similar to 0.02 eV, we used He-4 in 2005-2007 to cover the mass range of 0.02-0.39 eV and He-3 in 2009-2011 to scan from 0.39 to 1.17 eV. After improving the detectors and shielding, we returned to He-4 in 2012 to investigate a narrow m(a) range around 0.2 eV ("candidate setting" of our earlier search) and 0.39-0.42 eV, the upper axion mass range reachable with He-4, to "cross the axion line" for the KSVZ model. We have improved the limit on the axion-photon coupling to g(a gamma) < 1.47 x 10(-10) GeV-1 (95% C.L.), depending on the pressure settings. Since 2013, we have returned to the vacuum and aim for a significant increase in sensitivity.

Published
2015
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8. Low Background Micromegas in CAST

Author

Javier Galan, S. Aune, F.J. Iguaz, A. Tomás, Julia Vogel, I. G. Irastorza, D. Calvet, D. Jourde, J. G. Garza, M. Davenport, F. Aznar, E. Ferrer-Ribas, R. M. Hill, T. Decker, M. J. Pivovaroff, T. Dafni, H. Mirallas, Ioannis Giomataris, Anders Clemen Jakobsen, J. F. Castel, Theodoros Vafeiadis, J. Ruz, Finn Erland Christensen, T. Papaevangelou, I. Ortega, and J. A. Garcia

Subjects
Physics, History, Helioscope, Particle physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Canfranc Underground Laboratory, Detector, FOS: Physical sciences, MicroMegas detector, Instrumentation and Detectors (physics.ins-det), First generation, Computer Science Applications, Education, Observatory, Detectors and Experimental Techniques, Nuclear Experiment (nucl-ex), CERN Axion Solar Telescope, Axion, Nuclear Experiment
Abstract

Solar axions could be converted into x-rays inside the strong magnetic field of an axion helioscope, triggering the detection of this elusive particle. Low background x-ray detectors are an essential component for the sensitivity of these searches. We report on the latest developments of the Micromegas detectors for the CERN Axion Solar Telescope (CAST), including technological pathfinder activities for the future International Axion Observatory (IAXO). The use of low background techniques and the application of discrimination algorithms based on the high granularity of the readout have led to background levels below 10$^{-6}$ counts/keV/cm$^2$/s, more than a factor 100 lower than the first generation of Micromegas detectors. The best levels achieved at the Canfranc Underground Laboratory (LSC) are as low as 10$^{-7}$ counts/keV/cm$^2$/s, showing good prospects for the application of this technology in IAXO. The current background model, based on underground and surface measurements, is presented, as well as the strategies to further reduce the background level. Finally, we will describe the R&D paths to achieve sub-keV energy thresholds, which could broaden the physics case of axion helioscopes., 6 pages, 3 figures, Large TPC Conference 2014, Paris

Published
2015
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9. The IAXO Helioscope

Author

I. Savvidis, I. G. Irastorza, I. Ortega, Toyokazu Sekiguchi, K Saikawa, M. Davenport, Serkant Ali Cetin, C. Eleftheriadis, C. Krieger, D. Chelouche, O. Limousin, Charles J. Hailey, P. Vedrine, G. Fanourakis, S. Caspi, Gianpaolo Carosi, Javier Redondo, A. Tomás, Ioannis Giomataris, Javier Galan, Hector Gomez, Pierre Sikivie, A.C. Jakobsen, S. Russenschuck, J. G. Garza, F.J. Iguaz, Kenichi Imai, K. van Bibber, Pierre Brun, Marin Karuza, A. Dael, Takashi Hiramatsu, S. Gninenko, A. Lindner, M. Betz, Dieter H. H. Hoffmann, A. Liolios, Jochen Kaminski, E. Ferrer Ribas, Theodoros Geralis, V. N. Muratova, Julia Vogel, Yannis K. Semertzidis, Theodoros Vafeiadis, Babette Döbrich, Sergey Troitsky, G. Luzón, A. V. Derbin, D. González-Díaz, Michael J. Pivovaroff, F. T. Avignone, J. A. Garcia, Joerg Jaeckel, Amanda Weltman, W. C. Wester, Georg G. Raffelt, Masahiro Kawasaki, A. Dudarev, Andreas Ringwald, Krešimir Jakovčić, T. Dafni, Milica Krčmar, J.A. Villar, A. Diago, Eduardo Guendelman, Konstantin Zioutas, Dieter Horns, Klaus Kurt Desch, J. Ruz, J. M. Carmona, Giovanni Cantatore, Benito Gimeno, F.E. Christensen, P. Brax, T. Papaevangelou, L. Walckiers, Jordi Isern, Konstantinos Kousouris, I. Dratchnev, I. Shilon, Fritz Caspers, C. Nones, S. Matsuki, S. C. Yildiz, Biljana Lakić, H. H. J. ten Kate, E. Armengaud, H. Silva, Ribas, E. Ferrer, Armengaud, E., Avignone, F. T., Betz, M., Brax, P., Brun, P., Cantatore, Giovanni, Carmona, J. M., Carosi, G. P., Caspers, F., Caspi, S., Cetin, S. A., Chelouche, D., Christensen, F. E., Dael, A., Dafni, T., Davenport, M., Derbin, A. V., Desch, K., Diago, A., Döbrich, B., Dratchnev, I., Dudarev, A., Eleftheriadis, C., Fanourakis, G., Galán, J., García, J. A., Garza, J. G., Geralis, T., Gimeno, B., Giomataris, I., Gninenko, S., Gómez, H., González Diaz, D., Guendelman, E., Hailey, C. J., Hiramatsu, T., Hoffmann, D. H. H., Horns, D., Iguaz, F. J., Irastorza, I. G., Isern, J., Imai, K., Jaeckel, J., Jakobsen, A. C., Jakovčić, K., Kaminski, J., Kawasaki, M., Karuza, M., Krčmar, M., Kousouris, K., Krieger, C., Lakić, B., Limousin, O., Lindner, A., Liolios, A., Luzón, G., Matsuki, S., Muratova, V. N., Nones, C., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Redondo, J., Ringwald, A., Russenschuck, S., Ruz, J., Saikawa, K., Savvidis, I., Sekiguchi, T., Semertzidis, Y. K., Shilon, I., Sikivie, P., Silva, H., Ten Kate, H. H. J., Tomas, A., Troitsky, S., Vafeiadis, T., Van Bibber, K., Vedrine, P., Villar, J. A., Vogel, J. K., Walckiers, L., Weltman, A., Wester, W., Yildiz, S. C., Zioutas, K., Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, and Çetin, Serkant Ali

Subjects
History, Particle physics, QCD axion, Dark matter, X-ray optics, Detectable Signal, 7. Clean energy, magnetic helioscope, dark matter, Education, Solar tracker, Optics, QCD axions, ddc:530, Detectors and Experimental Techniques, Axion, Physics, Helioscope, Fourth Generation, business.industry, Technical Design, Detector, MicroMegas detector, Toroidal Magnets, Low Background Detectors, Computer Science Applications, Magnet, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Feasibility Studies, X-ray Focusing Optics, business
Abstract

Çetin, Serkant Ali (Dogus Author) -- Conference full title: 7th International Symposium on Large TPCs for Low-Energy Rare Event Detection; Institute of Astroparticle Physics (APC) Campus - Paris Diderot UniversityParis; France; 15 December 2014 through 17 December 2014 The IAXO (International Axion Experiment) is a fourth generation helioscope with a sensitivity, in terms of detectable signal counts, at least 104 better than CAST phase-I, resulting in sensitivity on gaγ one order of magnitude better. To achieve this performance IAXO will count on a 8-coil toroidal magnet with 60 cm diameter bores and equipped with X-ray focusing optics into 0.20 cm2 spots coupled to ultra-low background Micromegas X-ray detectors. The magnet will be on a platform that will allow solar tracking for 12 hours per day. The next short term objectives are to prepare a Technical Design Report and to construct the first prototypes of the hardware main ingredients: demonstration coil, X-ray optics and low background detector while refining the physics case and studying the feasibility studies for Dark Matter axions.

Published
2015
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10. Low background x-ray detection with Micromegas for axion research

Author

Ioannis Giomataris, I. Ortega, S. C. Yildiz, F.J. Iguaz, A. Tomás, A Rodríguez, A. Diago, J. G. Garza, Javier Galan, J. A. Garcia, T. Papaevangelou, I. G. Irastorza, A. Gardikiotis, Theodoros Vafeiadis, E. Ferrer-Ribas, and T. Dafni

Subjects
Physics, History, Particle physics, 010308 nuclear & particles physics, Detector, X-ray detector, MicroMegas detector, 01 natural sciences, Computer Science Applications, Education, Background level, Signal strength, 0103 physical sciences, 010306 general physics, Axion
Abstract

We have studied low-background techniques in order to improve the background level for Micromegas detectors. These detectors are good candidates for rare event searches thanks to the low mass and the radiopurity of the materials used in the construction; moreover they have good discrimination capabilities. The motivation of these studies is the reduction of the background level in the CAST experiment where three of the four detectors operating currently are Micromegas of the microbulk type. The last result of the experience acquired in low-background techniques has been the reduction of the background level by a factor 4.5 for two detectors in the CAST experiment, corresponding to an improvement of a factor 2 in signal strength.

Published
2014
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11. CAST constraints on the axion-electron coupling

Author

M. D. Hassinoff, Joaquin Vieira, G. Lutz, Krešimir Jakovčić, Javier Redondo, K. Königsmann, J. A. Garcia, H. Fischer, J. M. Carmona, I. G. Irastorza, Julia Vogel, Biljana Lakić, Dieter Hoffmann, K. Barth, G. Luzón, Javier Galan, C. Eleftheriadis, A. Liolios, J. Franz, I. Giomataris, H. Riege, K. van Bibber, D. Kang, Milica Krčmar, David Miller, J.A. Villar, L. Stewart, E. Ferrer Ribas, B. Beltrán, M. Davenport, Peter Friedrich, Heinrich Bräuninger, M. J. Pivovaroff, Konstantin Zioutas, Adriane De Assis Lawisch Rodriguez, T. Papaevangelou, L. Di Lella, Jakob Englhauser, F. H. Heinsius, Georgios Fanourakis, Sergei Gninenko, Konstantinos Kousouris, Yannis K. Semertzidis, J. Ruz, Joachim Jacoby, T. Geralis, Hector Gomez, T. Dafni, Louis Walckiers, Markus Kuster, Ante Ljubičić, I. Savvidis, Georg G. Raffelt, A. Belov, Rainer Kotthaus, and J. I. Collar

Subjects
Particle physics, Astrophysics and Astronomy, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Flux, FOS: Physical sciences, pacs:97.10.Me, Astrophysics, Electron, 01 natural sciences, High Energy Physics::Theory, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, ddc:530, 010306 general physics, pacs:14.80.Mz, Axion, axions, dark matter experiments, solar physics, white and brown dwarfs, Solar and Stellar Astrophysics (astro-ph.SR), Coupling, Physics, Helioscope, pacs:97.20.Rp, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Compton scattering, Bremsstrahlung, Yukawa potential, Astronomy and Astrophysics, pacs:97.10.Ld, High Energy Physics - Phenomenology, Astrophysics - Solar and Stellar Astrophysics
Abstract

In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axio-recombination, the "BCA processes." Based on a new calculation of this flux, including for the first time axio-recombination, we derive limits on the axion-electron Yukawa coupling g_ae and axion-photon interaction strength g_ag using the CAST phase-I data (vacuum phase). For m_a < 10 meV/c2 we find g_ag x g_ae< 8.1 x 10^-23 GeV^-1 at 95% CL. We stress that a next-generation axion helioscope such as the proposed IAXO could push this sensitivity into a range beyond stellar energy-loss limits and test the hypothesis that white-dwarf cooling is dominated by axion emission. In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axio-recombination, the ``BCA processes.'' Based on a new calculation of this flux, including for the first time axio-recombination, we derive limits on the axion-electron Yukawa coupling gae and axion-photon interaction strength ga(γ) using the CAST phase-I data (vacuum phase). For malesssim10 meV/c(2) we find ga(γ) gae

Published
2013

12. Future axion searches with the International Axion Observatory (IAXO)

Author

C. Krieger, A. Lindner, Javier Redondo, Biljana Lakić, L. Walckiers, Pierre Sikivie, Joerg Jaeckel, A. Tomás, Ioannis Giomataris, Iratxe Ortega, K Saikawa, Hector Gomez, Jochen Kaminski, Takashi Hiramatsu, F.J. Iguaz, H. H. J. ten Kate, Milica Krčmar, Anders Clemen Jakobsen, Dieter H. H. Hoffmann, F. T. Avignone, Theodoros Vafeiadis, Krešimir Jakovčić, H. Silva, J.A. Villar, Javier Galan, B. Döbrich, I. Shilon, C. J. Hailey, Jordi Isern, J. G. Garza, A. Diago, Michael J. Pivovaroff, Konstantin Zioutas, S. C. Yildiz, W. C. Wester, Theodoros Geralis, S. Caspi, A. Dael, S. Gninenko, Julia Vogel, K. van Bibber, Toyokazu Sekiguchi, G. Luzón, M. Davenport, Georg G. Raffelt, Finn Erland Christensen, Sergey Troitsky, J. Ruz, Masahiro Kawasaki, Giovanni Cantatore, A. V. Derbin, A. Liolios, C. Eleftheriadis, Dieter Horns, B. Gimeno, T. Papaevangelou, J. M. Carmona, A. Dudarev, Eduardo Guendelman, Andreas Ringwald, Serkant Ali Cetin, I. G. Irastorza, P. Vedrine, G. Fanourakis, I. Savvidis, T. Dafni, S. Russenschuck, E. Ferrer-Ribas, Klaus Kurt Desch, J. A. Garcia, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, Çetin, Serkant Ali, I. G., Irastorza, F. T., Avignone, Cantatore, Giovanni, J. M., Carmona, S., Caspi, S. A., Cetin, F. E., Christensen, A., Dael, T., Dafni, M., Davenport, A. V., Derbin, K., Desch, A., Diago, B., Döbrich, A., Dudarev, C., Eleftheriadi, G., Fanouraki, E., Ferrer Riba, J., Galán, J. A., García, J. G., Garza, T., Gerali, B., Gimeno, I., Giomatari, S., Gninenko, H., Gómez, E., Guendelman, C. J., Hailey, T., Hiramatsu, D. H. H., Hoffmann, D., Horn, F. J., Iguaz, J., Isern, A. C., Jakobsen, J., Jaeckel, K., Jakovčić, J., Kaminski, M., Kawasaki, M., Krčmar, C., Krieger, B., Lakić, A., Lindner, A., Liolio, G., Luzón, I., Ortega, T., Papaevangelou, M. J., Pivovaroff, G., Raffelt, J., Redondo, A., Ringwald, S., Russenschuck, J., Ruz, K., Saikawa, I., Savvidi, T., Sekiguchi, I., Shilon, P., Sikivie, H., Silva, H., ten Kate, A., Toma, S., Troitsky, T., Vafeiadi, K., van Bibber, P., Vedrine, J. A., Villar, J. K., Vogel, L., Walckier, W., Wester, S. C., Yildiz, and K., Zioutas

Subjects
Physics, History, Particle physics, solar axion, Orders of Magnitude, 010308 nuclear & particles physics, Rare event detection, Single photon detectors, Low Background Detectors, 01 natural sciences, dark matter, White Dwarfs, Computer Science Applications, Education, Low energy, Observatory, 0103 physical sciences, solar axions, ddc:530, X-ray Focusing Optics, 010306 general physics, Axion
Abstract

Çetin, Serkant Ali (Dogus Author) -- Conference full title: 6th Symposium on Large TPCs for Low Energy Rare Event Detection; Paris; France; 17 December 2012 through 19 December 2012. The International Axion Observatory (IAXO) is a new generation axion helioscope aiming at a sensitivity to the axion-photon coupling of gaγ ∼ few × 10-12 GeV-1, i.e. 1-1.5 orders of magnitude beyond the one achieved by CAST, currently the most sensitive axion helioscope. The main elements of IAXO are an increased magnetic field volume together with extensive use of x-ray focusing optics and low background detectors, innovations already successfully tested in CAST. Additional physics cases of IAXO could include the detection of electron-coupled axions invoked to explain the white dwarf cooling, relic axions, and a large variety of more generic axion-like particles (ALPs) and other novel excitations at the low-energy frontier of elementary particle physics.

Published
2013
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13. Status and perspectives of the CAST experiment

Author

Biljana Lakić, José Villar, C. Ezer, J. I. Collar, T. Dafni, S. Borghi, Giovanni Cantatore, T. Geralis, F.J. Iguaz, S. C. Yildiz, Theodoros Vafeiadis, M. Davenport, S. N. Gninenko, J. Ruz, Sami K. Solanki, Evangelos Gazis, M. Rosu, Georgios Fanourakis, Hector Gomez, Joachim Jacoby, Georg G. Raffelt, G. Lutz, Julia Vogel, Marin Karuza, Markus Kuster, K. Barth, G. Luzón, A. Liolios, A. Gardikiotis, Timur Rashba, A. Belov, S. Aune, T. Papaevangelou, E. Ferrer-Ribas, N. Elias, F. Haug, M. D. Hasinoff, Peter Friedrich, M Tsagri, I. Savvidis, Raimo Hartmann, H. Riege, Rainer Kotthaus, T. O. Niinikoski, J. M. Carmona, I. G. Irastorza, M. J. Pivovaroff, Dieter H. H. Hoffmann, A Rodríguez, Konstantin Zioutas, J. Morales, E. Gruber, J. A. Garcia, Krešimir Jakovčić, V. Lozza, K. Königsmann, L. Stewart, I. Giomataris, C. Eleftheriadis, A. Nordt, J. M. Laurent, A. Tomás, P. S. Silva, M. Arik, Ante Ljubičić, Javier Galan, Heinrich Bräuninger, Milica Krčmar, Serkant Ali Cetin, T. Guthörl, K. van Bibber, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR144760, Arık, Metin, B., Lakić, M., Arik, S., Aune, K., Barth, A., Belov, S., Borghi, H., Bräuninger, Cantatore, Giovanni, J. M., Carmona, S. A., Cetin, J. I., Collar, T., Dafni, M., Davenport, C., Eleftheriadi, N., Elia, C., Ezer, G., Fanouraki, E., Ferrer Riba, P., Friedrich, J., Galán, J. A., García, A., Gardikioti, E. N., Gazi, T., Gerali, I., Giomatari, S., Gninenko, H., Gómez, E., Gruber, T., Guthörl, R., Hartmann, F., Haug, M. D., Hasinoff, D. H. H., Hoffmann, F. J., Iguaz, I. G., Irastorza, J., Jacoby, K., Jakovčić, M., Karuza, K., Königsmann, R., Kotthau, M., Krčmar, M., Kuster, J. M., Laurent, A., Liolio, A., Ljubičić, V., Lozza, G., Lutz, G., Luzón, J., Morale, T., Niinikoski, A., Nordt, T., Papaevangelou, M. J., Pivovaroff, G., Raffelt, T., Rashba, H., Riege, A., Rodríguez, M., Rosu, J., Ruz, I., Savvidi, P. S., Silva, S. K., Solanki, L., Stewart, A., Tomá, M., Tsagri, K., van Bibber, T., Vafeiadi, J., Villar, J. K., Vogel, S. C., Yildiz, and K., Zioutas

Subjects
History, Particle physics, solar axion, Physics::Instrumentation and Detectors, 01 natural sciences, 7. Clean energy, Education, Nuclear physics, High Energy Physics::Theory, Phase I, Solar core, 0103 physical sciences, Buffer Gas, 010306 general physics, CERN Axion Solar Telescopes, Axion, Coupling constant, Physics, Coupling Constants, Helioscope, Various Densities, Large Hadron Collider, 010308 nuclear & particles physics, Axion Dark Matter Experiment, X-Rays, High Energy Physics::Phenomenology, Single photon detectors, Phase II, axions, solar physics, dark matter, Computer Science Applications, solar axions, Magnet, X-Ray, CERN Axion Solar Telescope
Abstract

Arık, Metin (Dogus Author) -- The conference paper was firstly submitted to 12th International Conference on Topics in Astroparticle and Underground Physics. The CERN Axion Solar Telescope (CAST) is currently the most sensitive axion helioscope designed to search for axions produced by the Primakoff process in the solar core. CAST is using a Large Hadron Collider (LHC) test magnet where axions could be converted into X-rays with energies up to 10 keV. During the phase I, the experiment operated with vacuum inside the magnet bores and covered axion masses up to 0.02 eV. In the phase II, the magnet bores were filled with a buffer gas (first 4He and later 3He) at various densities in order to extend the sensitivity to higher axion masses (up to f .18 eV). The phase II data taking was completed in 2011. So far, no evidence of axion signal has been found and CAST set the most restrictive experimental limit on the axion-photon coupling constant over a broad range of axion masses. The latest CAST results with 3He data in the mass range 0.39 eV < m a < 0.64 eV will be presented.

Published
2012
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14. Rare event searches based on micromegas detectors: The T-REX project

Author

I. Giomataris, A. Gardikiotis, A Rodríguez, J. G. Garza, J. Ruz, T. Papaevangelou, J. A. Garcia, S. C. Yildiz, A. Tomás, G. Luzón, Javier Galan, Georgios Fanourakis, T. Dafni, Theodoros Vafeiadis, Hector Gomez, F.J. Iguaz, T. Geralis, L. Segui, S. Aune, S. Cebrián, D.C. Herrera, I. G. Irastorza, E. Ferrer-Ribas, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, and Yıldız, Süleyman Cenk

Subjects
Physics, Micromegas Detector, History, Particle physics, Helioscope, 010308 nuclear & particles physics, Gain Stability, Detector, MicroMegas detector, Rare Event, 01 natural sciences, Computer Science Applications, Education, Time Projection Chambers, Double beta decay, 0103 physical sciences, Rare events, Energy Resolutions, 010306 general physics, Double Beta Decay, Axion, Micromegas
Abstract

Yıldız, Süleyman Cenk (Dogus Author) -- The conference paper was firstly submitted to 12th International Conference on Topics in Astroparticle and Underground Physics. Micromegas readouts are an attractive option for many of the rare event searches, due to their performance regarding energy resolution, gain stability, homogeneity and material budget. The T-REX project aims at developing further these novel readout techniques for Time Projection Chambers and their potential use in experiments searching for rare events. Here we will refer to the latest results regarding the use and prospects of Micromegas read-outs in axion physics (CAST and the future helioscope), as well as the R&D carried out within NEXT, to search for the neutrinoless double-beta decay.

Published
2012

15. Search for Sub-eV Mass Solar Axions by the CERN Axion Solar Telescope withHe3Buffer Gas

Author

K. Königsmann, T. Dafni, J. M. Laurent, Joachim Jacoby, Sergei Gninenko, Milica Krčmar, Ante Ljubičić, Biljana Lakić, Hector Gomez, F. Haug, Marin Karuza, Evangelos Gazis, T. Guthörl, C. Eleftheriadis, H. Riege, J. Morales, A. Liolios, N. Elias, Heinrich Bräuninger, José Villar, Serkant Ali Cetin, G. Lutz, S. Aune, A. Tomás, A. Nordt, V. Lozza, M. Arik, T. Geralis, I. Giomataris, K. van Bibber, T. Papaevangelou, I. Savvidis, Javier Galan, Dieter Hoffmann, M. Tsagri, J. Ruz, Sami K. Solanki, J. A. Garcia, M. Rosu, Markus Kuster, Krešimir Jakovčić, T. O. Niinikoski, Peter Friedrich, P. S. Silva, M. J. Pivovaroff, Konstantin Zioutas, A. Gardikiotis, M. Davenport, Raimo Hartmann, Julia Vogel, J. I. Collar, Theodoros Vafeiadis, K. Barth, G. Luzón, Adriane De Assis Lawisch Rodriguez, E. Ferrer-Ribas, C. Ezer, A. Belov, Rainer Kotthaus, L. Stewart, I. G. Irastorza, Georg G. Raffelt, Georgios Fanourakis, S. C. Yildiz, Timur Rashba, M. D. Hasinoff, J. M. Carmona, E. Gruber, S. Borghi, Giovanni Cantatore, and F.J. Iguaz

Subjects
Physics, Helioscope, Particle physics, Solar energetic particles, 010308 nuclear & particles physics, Hot dark matter, Dark matter, General Physics and Astronomy, Astrophysics, 01 natural sciences, 7. Clean energy, Massless particle, 0103 physical sciences, Strong CP problem, 010306 general physics, CERN Axion Solar Telescope, Axion
Abstract

The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using (3)He as a buffer gas. At T=1.8 K this allows for larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with (4)He. With about 1 h of data taking at each of 252 different pressure settings we have scanned the axion mass range 0.39 eV≲m(a)≲0.64 eV. From the absence of excess x rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g(aγ)≲2.3×10(-10) GeV(-1) at 95% C.L., the exact value depending on the pressure setting. Kim-Shifman-Vainshtein-Zakharov axions are excluded at the upper end of our mass range, the first time ever for any solar axion search. In the future we will extend our search to m(a)≲1.15 eV, comfortably overlapping with cosmological hot dark matter bounds.

Published
2011
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16. Latest results and prospects of the CERN Axion Solar Telescope

Author

I. Giomataris, C. Eleftheriadis, T. Guthörl, S. C. Yildiz, José Villar, A. Tomás, G Lutz, I. G. Irastorza, F.J. Iguaz, Georgios Fanourakis, Biljana Lakić, L. Stewart, Javier Galan, S. Aune, Hector Gomez, J. M. Carmona, Marin Karuza, Dieter H. H. Hoffmann, V. Lozza, Milica Krčmar, Ante Ljubičić, K. Königsmann, M. Davenport, Theodoros Vafeiadis, E. Gruber, J. M. Laurent, Joachim Jacoby, S. Borghi, F. Haug, Timur Rashba, T. Papaevangelou, M. Tsagri, M. D. Hasinoff, I. Savvidis, Heinrich Bräuninger, P. S. Silva, M. Rosu, Peter Friedrich, M. J. Pivovaroff, Serkant Ali Cetin, T. Geralis, Konstantin Zioutas, T. O. Niinikoski, Giovanni Cantatore, S. N. Gninenko, K. van Bibber, A. Gardikiotis, Raimo Hartmann, J. Ruz, A. Liolios, N. Elias, Sami K. Solanki, Markus Kuster, A Nordt, E. Ferrer-Ribas, Julia Vogel, K. Barth, G. Luzón, H. Riege, C. Ezer, T. Dafni, A Rodríguez, Krešimir Jakovčić, Evangelos Gazis, Georg G. Raffelt, Regina Soufli, A. Belov, J. Morales, Rainer Kotthaus, J. I. Collar, I. G., Irastorza, S., Aune, K., Barth, A., Belov, S., Borghi, H., Bräuninger, Cantatore, Giovanni, J. M., Carmona, S. A., Cetin, J. I., Collar, T., Dafni, M., Davenport, C., Eleftheriadi, N., Elia, C., Ezer, G., Fanouraki, E., Ferrer Riba, P., Friedrich, J., Galán, A., Gardikioti, E. N., Gazi, T., Gerali, I., Giomatari, S., Gninenko, H., Gómez, E., Gruber, T., Guthörl, R., Hartmann, F., Haug, M. D., Hasinoff, D. H. H., Hoffmann, F. J., Iguaz, J., Jacoby, K., Jakovčić, M., Karuza, K., Königsmann, R., Kotthau, M., Krčmar, M., Kuster, B., Lakić, J. M., Laurent, A., Liolio, A., Ljubičić, Lozza, Valentina, G., Lutz, G., Luzón, J., Morale, T., Niinikoski, A., Nordt, T., Papaevangelou, M. J., Pivovaroff, G., Raffelt, T., Rashba, H., Riege, A., Rodríguez, M., Rosu, J., Ruz, I., Savvidi, P. S., Silva, S. K., Solanki, R., Soufli, L., Stewart, A., Tomá, M., Tsagri, Bibber, K. v. a. n., T., Vafeiadi, J., Villar, J. K., Vogel, S. C., Yildiz, K., Zioutas, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, Çetin, Serkant Ali, Ezer, C., and Yıldız, Süleyman Cenk

Subjects
History, Particle physics, axions, Physics::Instrumentation and Detectors, Dark matter, 01 natural sciences, 7. Clean energy, dark matter, Education, Phase I, 0103 physical sciences, 010306 general physics, CERN Axion Solar Telescopes, Axion, Primakoff effect, solar physics, Physics, High Magnetic Fields, Helioscope, Large Hadron Collider, 010308 nuclear & particles physics, Axion Dark Matter Experiment, solar physic, Solar physics, Computer Science Applications, ddc, axion, CERN Axion Solar Telescope
Abstract

Çetin, Serkant Ali (Dogus Author) -- Ezer, C. (Dogus Author) -- Yıldız, Süleyman Cenk (Dogus Author) The CERN Axion Solar Telescope (CAST) experiment searches for axions from the Sun converted into few keV photons via the inverse Primakoff effect in the high magnetic field of a superconducting Large Hadron Collider (LHC) decommissioned test magnet. After results obtained with vacuum in the magnet pipes (phase I of the experiment) as well as with 4He the collaboration is now immersed in the data taking with 3He, to be finished in 2011. The status of the experiment will be presented, including a preliminary exclusion plot of the first 3He data. CAST is currently sensitive to realistic QCD axion models at the sub-eV scale, and with axion-photon couplings down to the ∼ 2 × 10-10 GeV -1, compatible with solar life limits. Future plans include revisiting vaccuum and 4He configurations with improved sensitivity, as well as possible additional search for non-standard signals from chamaleons, paraphotons or other WISPs. For the longer term, we study the feasibility of an altogether improved version of the axion helioscope concept, with a jump in sensitivity of about one order of magnitude in gaγ beyond CAST.

Published
2011

17. New Micromegas Detectors for Rare Event Searches: axions and decay

Author

P Gorodetzky, S. Aune, J. M. Carmona, T. Dafni, Thomas Papaevangelou, P. Salin, J. Morales, T. Geralis, A. Tomás, F.J. Iguaz, José Villar, Javier Galan, A Rodríguez, Hector Gomez, I. Giomataris, E. Ferrer-Ribas, J. Ruz, G. Luzón, S. Cebrián, I. G. Irastorza, and Georgios Fanourakis

Subjects
Nuclear physics, Physics, Particle physics, Physics::Instrumentation and Detectors, Double beta decay, Detector, MicroMegas detector, Axion, Radioactive decay
Abstract

Recently, micropattern detectors and in particular micromegas are receiving much attention from the community of rare event searches. The main features that make these detectors rather promising for this field of research and which distinguish them from other gaseous structures are their very stable operation, their homogeneity and granularity which result in very good energy and spatial resolution. In this paper we summarize the latest results on the development of new generation micromegas detectors focusing on rare event searches; more specifically their performance in the search of axions and their possible application to double beta decay experiments.

Published
2008
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18. Exploring 0.1–10 eV axions with a new helioscope concept

Author

T. Papaevangelou, Javier Redondo, F.J. Iguaz, A. Tomás, G. Luzón, I. Giomataris, Javier Galan, I. G. Irastorza, J. A. Garcia, E. Ferrer-Ribas, T. Dafni, and J. G. Garza

Subjects
Physics, Particle physics, Helioscope, Physics - Instrumentation and Detectors, Photon, Time projection chamber, Buffer gas, FOS: Physical sciences, chemistry.chemical_element, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Tracking (particle physics), 7. Clean energy, Magnetic field, chemistry, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Axion, Helium
Abstract

We explore the possibility to develop a new axion helioscope type, sensitive to the higher axion mass region favored by axion models. We propose to use a low background large volume TPC immersed in an intense magnetic field. Contrary to traditional tracking helioscopes, this detection technique takes advantage of the capability to directly detect the photons converted on the buffer gas which defines the axion mass sensitivity region, and does not require pointing the magnet to the Sun. The operation flexibility of a TPC to be used with different gas mixtures (He, Ne, Xe, etc) and pressures (from 10 mbar to 10 bar) will allow to enhance sensitivity for axion masses from few meV to several eV. We present different helioscope data taking scenarios, considering detection efficiency and axion absorption probability, and show the sensitivities reachable with this technique to be few $\times$ 10$^{-11}\,$GeV$^{-1}$ for a 5$\,$T$\,$m$^3$ scale TPC. We show that a few years program taking data with such setup would allow to probe the KSVZ axion model for axion masses above 100 meV., Comment: prepared for submission to JCAP

Published
2015
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19. The T-REX project: Micromegas for Rare Event Searches

Author

I. G. Irastorza, F.J. Iguaz, S. Aune, Georgios Fanourakis, J. F. Castel, A. Ortiz, Hector Gomez, T. Geralis, S. C. Yildiz, T. Dafni, G. Luzón, E. Ferrer-Ribas, A. Tomás, A. Gardikiotis, Javier Galan, L. Segui, D.C. Herrera, J. G. Garza, A Rodríguez, T. Papaevangelou, J. A. Garcia, Theodoros Vafeiadis, I. Giomataris, D. Fortuño, S. Cebrián, J.P. Mols, J. Ruz, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, and Yıldız, Şükrü C.

Subjects
Micromegas Detector, Physics, History, Particle physics, 010308 nuclear & particles physics, Event (computing), Time Resolution, Real-time computing, MicroMegas detector, Time resolution, Rare Event, Low Background, 01 natural sciences, Computer Science Applications, Education, Time Projection Chambers, Clouds, Double beta decay, 0103 physical sciences, Rare events, High Energy Physics, Double Beta Decay, 010306 general physics, Projection (set theory), Micromegas
Abstract

Yıldız, Şükrü C. (Dogus Author) -- This paper was firstyly submitted to 2nd International Conference on Particle Physics in Memoriam Engin Arik and Her Colleagues. The T-REX project aims at developing novel readout techniques for Time Projection Chambers for experiments searching for Rare Events. The Micromegas detectors are a good option, because of their good performance regarding low background levels, energy and time resolution, gain and stability of operation. In the present we will shortly refer to two particular cases, on one hand their performance in the CAST experiment and on the other the studies carried out within NEXT, a neutrinoless double-beta decay experiment.

Published
2012
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20. Technique to measure the cosmic muon flux at the old Canfranc Underground Laboratory

Author

Adriane De Assis Lawisch Rodriguez, J. M. Carmona, A. Tomás, J. Ruz, J. Morales, F.J. Iguaz, S. Cebrián, T. Dafni, Javier Galan, L. Segui, Hector Gomez, I. G. Irastorza, and G. Luzón

Subjects
Physics, History, Particle physics, COSMIC cancer database, Time projection chamber, Muon, Physics::Instrumentation and Detectors, Canfranc Underground Laboratory, Detector, Measure (physics), Scintillator, Computer Science Applications, Education, Nuclear physics, High Energy Physics::Experiment, Intensity (heat transfer)
Abstract

A technique to measure the cosmic muon flux distribution has been developed in the old Canfranc Underground Laboratory (2450 m.w.e.).This technique can determine the muon direction and it allows to obtain a three-dimensional distribution of the muon intensity which could be correlated to the mountain profile, as well. The experimental set-up, which has been taking data since November 2008, consists of a Time Projection Chamber (TPC) detector and a veto system composed of two plastic scintillators.

Published
2010
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21. Development of Micromegas for neutrinoless double beta decay searches

Author

A Rodríguez, E. Ferrer-Ribas, S. Cebrián, Hector Gomez, I. G. Irastorza, P Gorodetzky, T. Papaevangelou, Ioannis Giomataris, Fabien Jeanneau, J. Morales, F.J. Iguaz, A. Tomás, G. Luzón, T. Dafni, José Villar, Javier Galan, L. Segui, P. Salin, J. Ruz, J. M. Carmona, Laboratorio de Física Nuclear y Astropartículas, Universidad de Zaragoza, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), 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, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, High energy, Particle physics, chemistry.chemical_element, MicroMegas detector, Nuclear physics, Quality (physics), Xenon, chemistry, Ionization, High pressure, Double beta decay, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Instrumentation, Mathematical Physics, Bar (unit)
Abstract

International audience; The present paper is a summary of experimental tests performed with microbulk Micromegas for application in a neutrinoless double beta decay experiment based in a xenon TPC. No critical limitation related with high pressure has been detected for Micromegas, which has been tested up to 10 bar. No significant differences have been found between low energy X-rays and high energy alpha tracks regarding ionization yield and electronic transparency of Micromegas mesh. Using 5.5 MeV alphas in argon-isobutane mixtures, values as low as 1.8% FWHM have been obtained, with possible evidence that better resolutions are achievable. These results seems independent of pressure (probed up to 4.5 bar) or gas mixture (microbulks have run in xenon without quencher). The imperative necessity of high quality gas led to start on a new TPC and MPGD dedicated lab at Zaragoza.

Published
2009
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22. Micromegas for Axion Search and Prospects

Author

S. Cazaux, N. Duportail, M. Riallot, T. Geralis, S. Aune, Thomas Papaevangelou, D. Besin, Javier Galan, Regina Soufli, R. M. Hill, J. Morales, B.O. Dogan, I. G. Irastorza, Georgios Fanourakis, Konstantinos Kousouris, M. J. Pivovaroff, T. Decker, M. Gros, T. Dafni, J. Ruz, Ph. Abbon, E. Ferrer Ribas, S. Andriamonje, K. van Bibber, G. Zaffanela, K. Zachariadou, A. Giganon, and I. Giomataris

Subjects
Physics, History, Particle physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Detector, MicroMegas detector, Computer Science Applications, Education, law.invention, Telescope, Nuclear physics, law, Electromagnetic shielding, Axion, Energy (signal processing), Order of magnitude
Abstract

The Micromegas technology can be used to construct very powerful detectors for low background, low energy measurements. A Micromegas X-ray detector has been used to search for solar axions in the CAST experiment at CERN. The detector has an active area of 7 cm × 7 cm, a very good x-y position, and a good energy resolution. It is built using low radioactivity materials and it is capable of low energy X-ray measurements of a few hundred eV. Despite the lack of external shielding the obtained background level is below 5 × 105 counts/keV/cm2/s. The detector is being upgraded with a reduced active area Micromegas module, a focusing X-Ray telescope and shielding, which are expected to further reduce the background by about two orders of magnitude.

Published
2007
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23. Micromegas for rare event detection

Author

M. J. Pivovaroff, T. Geralis, P Gorodetzky, Regina Soufli, K. van Bibber, S. Aune, J. Morales, I. G. Irastorza, P. Colas, T Enqvist, F.J. Iguaz, G. Luzón, I. Savvidis, T. Dafni, José Villar, Adriane De Assis Lawisch Rodriguez, E. Ferrer-Ribas, A. Tomás, Javier Galan, P. Salin, J. Ruz, I. Giomataris, Georgios Fanourakis, and Konstantinos Kousouris

Subjects
Gaseous detectors, Physics, Particle physics, Time projection chamber, WIMP, Rare event detection, MicroMegas detector, Neutrino, Axion

24. Cast - A cern experiment to search for solar axions

Author

G. Lutz, E. Arik, D. Kang, J. Vogel, Javier Galan, Spyros Tzamarias, I. G. Irastorza, Heinrich Bräuninger, Serkant Ali Cetin, A. Belov, B. Beltrán, K. Barth, G. Luzón, Dieter Hoffmann, L. Di Lella, Yannis K. Semertzidis, J. Franz, F. H. Heinsius, A. Nordt, I. Hikmet, Georgios Fanourakis, M. Davenport, Konstantinos Kousouris, Milica Krčmar, M. J. Pivovaroff, Rainer Kotthaus, Konstantin Zioutas, J. M. Carmona, S. Aune, F. S. Boydag, T. Papaevangelou, T. Geralis, G. Bourlis, J. Ruz, D. J. Miller, I. Giomataris, I. Savvidis, Krešimir Jakovčić, A. Ortiz, K. Königsmann, Adriane De Assis Lawisch Rodriguez, D. Autiero, H. Fischer, C. Eleftheriadis, Regina Soufli, J. Morales, L. Stewart, O. B. Dogan, Louis Walckiers, T. Dafni, J. I. Collar, Markus Kuster, E. Ferrer-Ribas, M. D. Hasinoff, C. Lasseur, Hector Gomez, Pasquale D. Serpico, Georg G. Raffelt, A. Placci, José Villar, K. van Bibber, Ante Ljubičić, A. Morales, S. Cebrián, Biljana Lakić, A. Liolios, H. Riege, Joachim Jacoby, Sergei Gninenko, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, and Belirlenecek

Subjects
Physics, Particle physics, Large Hadron Collider, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Dark matter, Particle identification, law.invention, Telescope, High Energy Physics::Theory, Axion, law, Dark Matter, Astronomical telescopes, Solar Particles and Photons
Abstract

The CAST experiment at CERN is the only running solar axion telescope. The first results obtained so far with CAST - PHASE I is presented, which compete with the best astrophysically derived limits of the axion-to-photon coupling. The ongoing PHASE II of the experiment as well as the scheduled upgrades, which improve the axion discovery potential of CAST, are discussed. Baklan Physical Uniaon; Türk Fizik Derneği; İstanbul Üniversitesi; Yıldız Teknik Üniversitesi.

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