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1. Decay study of $^{11}$Be with an Optical TPC detector

Author: Sokołowska, N., Guadilla, V., Mazzocchi, C., Ahmed, R., Borge, M., Cardella, G., Ciemny, A. A., Cosentino, L. G., De Filippo, E., Fedosseev, V., Fijałkowska, A., Fraile, L. M., Geraci, E., Giska, A., Gnoffo, B., Granados, C., Janas, Z., Janiak, Ł., Johnston, K., Kamiński, G., Korgul, A., Kubiela, A., Maiolino, C., Marsh, B., Martorana, N. S., Miernik, K., Molkanov, P., Ovejas, J. D., Pagano, E. V., Pirrone, S., Pomorski, M., Quynh, A. M., Riisager, K., Russo, A., Russotto, P., Świercz, A., Viñals, S., Wilkins, S., and Pfützner, M.
Subjects: Nuclear Experiment
Abstract: The $\beta$ decay of one-neutron halo nucleus $^{11}$Be was investigated using the Warsaw Optical Time Projection Chamber (OTPC) detector to measure $\beta$-delayed charged particles. The results of two experiments are reported. In the first one, carried out in LNS Catania, the absolute branching ratio for $\beta$-delayed $\alpha$ emission was measured by counting incoming $^{11}$Be ions stopped in the detector and the observed decays with the emission of $\alpha$ particle. The result of 3.27(46)\% is in good agreement with the literature value. In the second experiment, performed at the HIE-ISOLDE facility at CERN, bunches containing several hundreds of $^{11}$Be ions were implanted into the OTPC detector followed by the detection of decays with the emission of charged particles. The energy spectrum of $\beta$-delayed $\alpha$ particles was determined in the full energy range. It was analysed in the R-matrix framework and was found to be consistent with the literature. The best description of the spectrum was obtained assuming that the two $3/2^+$ and one $1/2^+$ states in $^{11}$B are involved in the transition. The search for $\beta$-delayed emission of protons was undertaken. Only the upper limit for the branching ratio for this process of $(2.2 \pm 0.6_{\rm stat} \pm 0.6_{\rm sys}) \times 10^{-6}$ could be determined. This value is in conflict with the result published in [Ayyad et al. Phys. Rev. Lett. 123, 082501 (2019)] but does agree with the limit reported in [Riisager et al., Eur. Phys. J. A (2020) 56:100], Comment: 16 pages, 18 figures, submitted to Phys. Rev. C
Published: 2024

2. Production study of Fr, Ra and Ac radioactive ion beams at ISOLDE, CERN

Author: Jajčišinová, E., Dockx, K., Au, M., Bara, S., Cocolios, T. E., Chrysalidis, K., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Flanagan, K. T., Heines, M., Houngbo, D., Johnson, J. D., Kellerbauer, A., Kraemer, S., Marsh, B. A., Popescu, L., Ramos, J. P., Rothe, S., Seliverstov, M. D., Sels, S., Stegemann, S., Stryjczyk, M., and Verelst, V.
Published: 2024
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3. Generation of 10-m-lengthscale plasma columns by resonant and off-resonant laser pulses

Author: Demeter, G., Moody, J. T., Kedves, M. A., Batsch, F., Bergamaschi, M., Fedosseev, V., Granados, E., Muggli, P., Panuganti, H., and Della Porta, G. Zevi
Subjects: Physics - Optics, Physics - Plasma Physics
Abstract: Creating extended, highly homogeneous plasma columns like that required by plasma wakefield accelerators can be a challenge. We study the propagation of ultra-short, TW power ionizing laser pulses in a 10-meter-long rubidium vapor and the plasma columns they create. We perform experiments and numerical simulations for pulses with 780 nm central wavelength, which is resonant with the D$_2$ transition from the ground state of rubidium atoms, as well as for pulses with 810 nm central wavelength, some distance from resonances. We measure transmitted energy and transverse width of the pulse and use schlieren imaging to probe the plasma column in the vapor close to the end of the vapor source. We find, that resonant pulses are more confined in a transverse direction by the interaction than off-resonant pulses are and that the plasma channels they create are more sharply bounded. Off-resonant pulses leave a wider layer of partially ionized atoms and thus lose more energy per unit propagation distance. Using experimental data, we estimate the energy required to generate a 20-meter-long plasma column and conclude that resonant pulses are much more suitable for creating a long, homogeneous plasma., Comment: 16 pages, 14 figures
Published: 2023
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4. Mapping charge capture and acceleration in a plasma wakefield of a proton bunch using variable emittance electron beam injection

Author: Granados, E., Verra, L., Bachmann, A. -M., Chevallay, E., Doebert, S., Fedosseev, V., Friebel, F., Gessner, S., Gschwendtner, E., Kim, S. Y., Mazzoni, S., Moody, J. T., and Turner, M.
Subjects: Physics - Accelerator Physics, Physics - Plasma Physics
Abstract: In the Phase 2 of the AWAKE first experimental run (from May to November 2018), an electron beam was used to probe and test proton-driven wakefield acceleration in a rubidium plasma column. In this work, we analyze the overall charge capture and shot-to-shot reproducibility of the proton-driven plasma wakefield accelerator with various electron bunch injection parameters. The witness electron bunches were produced using an RF-gun equipped with a Cs2Te photocathode illuminated by a tailorable ultrafast deep ultraviolet (UV) laser pulse. The construction of the UV beam optical system enabled appropriate transverse beam shaping and control of its pulse duration, size, and position on the photocathode, as well as time delay with respect to the ionizing laser pulse that seeds the plasma wakefields in the proton bunches. Variable photocathode illumination provided the required flexibility to produce electron bunches with variable charge, emittance, and injection trajectory into the plasma column. We demonstrate charge capture rates exceeding 15% (40 pC of GeV accelerated charge for a 385 pC injected electron bunch) under optimized electron injection conditions.
Published: 2022

5. Charge radii, moments and masses of mercury isotopes across the N = 126 shell closure

Author: Goodacre, T. Day, Afanasjev, A. V., Barzakh, A. E., Nies, L., Marsh, B. A., Sels, S., Perera, U. C., Ring, P., Wienholtz, F., Andreyev, A. N., Van Duppen, P., Althubiti, N. A., Andel, B., Atanasov, D., Augusto, R. S., Billowes, J., Blaum, K., Cocolios, T. E., Cubiss, J. G., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Flanagan, K. T., Gaffney, L. P., Ghys, L., Gottberg, A., Huyse, M., Kreim, S., Kunz, P., Lunney, D., Lynch, K. M., Manea, V., Palenzuela, Y. Martinez, Medonca, T. M., Molkanov, P. L., Mougeot, M., Ramos, J. P., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Spagnoletti, P., Van Beveren, C., Veinhard, M., Verstraelen, E., Welker, A., Wendt, K., Wolf, R. N., Zadvornaya, A., and Zuber, K.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: Combining laser spectroscopy in a Versatile Arc Discharge and Laser Ion Source, with Penning-trap mass spectrometry at the CERN-ISOLDE facility, this work reports on mean-square charge radii of neutron-rich mercury isotopes across the $N = 126$ shell closure, the electromagnetic moments of $^{207}$Hg and more precise mass values of $^{206-208}$Hg. The odd-even staggering (OES) of the mean square charge radii and the kink at $N = 126$ are analyzed within the framework of covariant density functional theory (CDFT), with comparisons between different functionals to investigate the dependence of the results on the underlying single-particle structure. The observed features are defined predominantly in the particle-hole channel in CDFT, since both are present in the calculations without pairing. However, the magnitude of the kink is still affected by the occupation of the $1i_{11/2}$ and $2g_{9/2}$ orbitals with a dependence on the relative energies as well as pairing., Comment: 20 pages, 12 figures, Phys. Rev. C in press
Published: 2021
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6. A cold electron-impact ion source driven by a photo-cathode -- New opportunities for the delivery of radioactive molecular beams?

Author: Ballof, J., Au, M., Barbero, E., Chrysalidis, K., Düllmann, Ch. E., Fedosseev, V., Granados, E., Heinke, R., Marsh, B., Owen, M., Rothe, S., Stora, T., and Yakushev, A.
Subjects: Physics - Instrumentation and Detectors
Abstract: The thick-target ISOL (Isotope mass Separation OnLine) method provides beams of more than 1000 radionuclides of 74 elements. The method is well established for elements with sufficiently high volatility at ca. 2000 {\deg}C. To extract non-volatile elements the formation of a volatile molecule is required. While successful in some cases (e.g. carbon or boron), most of these elements are not yet available as ISOL beam. A variety of volatile carrier molecules has been proposed for all elements produced in the target material, but their probability of survival during the extraction and ionization process is often limited by the high temperatures required for isotope diffusion in the thick targets and for ion source operation. While cold target concepts have already been proposed, the normal mode of operation of the typically used Versatile Arc Discharge Ion Source (VADIS) with a hot cathode is not well suited. Here, we report about first measurements with an electron-impact ion source operated at ambient temperature using electrons that were liberated via the photo-electric effect from a copper cathode.
Published: 2021
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7. Analysis of Proton Bunch Parameters in the AWAKE Experiment

Author: Hafych, V., Caldwell, A., Agnello, R., Ahdida, C. C., Aladi, M., Goncalves, M. C. Amoedo, Andrebe, Y., Apsimon, O., Apsimon, R., Bachmann, A. -M., Baistrukov, M. A., Batsch, F., Bergamaschi, M., Blanchard, P., Burrows, P. N., Buttenschön, B., Chappell, J., Chevallay, E., Chung, M., Cooke, D. A., Damerau, H., Davut, C., Demeter, G., Dexter, A., Doebert, S., Farmer, J., Fasoli, A., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Furno, I., Gessner, S., Gorn, A. A., Granados, E., Granetzny, M., Graubner, T., Grulke, O., Gschwendtner, E., Guran, E. D., Henderson, J. R., Hüther, M., Kedves, M. Á., Khudyakov, V., Kim, S. -Y., Kraus, F., Krupa, M., Lefevre, T., Liang, L., Lopes, N., Lotov, K. V., Mazzoni, S., Godoy, D. Medina, Moody, J. T., Moon, K., Guzmán, P. I. Morales, Moreira, M., Nechaeva, T., Nowak, E., Pakuza, C., Panuganti, H., Pardons, A., Perera, A., Pucek, J., Pukhov, A., Ráczkevi, B., Ramjiawan, R. L., Rey, S., Schmitz, O., Senes, E., Silva, L. O., Stollberg, C., Sublet, A., Topaloudis, A., Torrado, N., Tuev, P. V., Turner, M., Velotti, F., Verra, L., Vieira, J., Vincke, H., Welsch, C. P., Wendt, M., Wing, M., Wolfenden, J., Woolley, B., Xia, G., Zepp, M., and Della Porta, G. Zevi
Subjects: Physics - Accelerator Physics, High Energy Physics - Experiment
Abstract: A precise characterization of the incoming proton bunch parameters is required to accurately simulate the self-modulation process in the Advanced Wakefield Experiment (AWAKE). This paper presents an analysis of the parameters of the incoming proton bunches used in the later stages of the AWAKE Run 1 data-taking period. The transverse structure of the bunch is observed at multiple positions along the beamline using scintillating or optical transition radiation screens. The parameters of a model that describes the bunch transverse dimensions and divergence are fitted to represent the observed data using Bayesian inference. The analysis is tested on simulated data and then applied to the experimental data.
Published: 2021
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8. A concept for the extraction of the most refractory elements at CERN-ISOLDE as carbonyl complex ions

Author: Ballof, J., Chrysalidis, K., Düllmann, Ch. E., Fedosseev, V., Granados, E., Leimbach, D., Marsh, B. A., Ramos, J. P., Ringvall-Moberg, A., Rothe, S., Stora, T., Wilkins, S. G., and Yakushev, A.
Subjects: Physics - Instrumentation and Detectors
Abstract: We introduce a novel thick-target concept tailored to the extraction of refractory 4d and 5d transition metal radionuclides of molybdenum, technetium, ruthenium and tungsten for radioactive ion beam production. Despite the more than 60-year old history of thick-target ISOL mass-separation facilities like ISOLDE, the extraction of the most refractory elements as radioactive ion beam has so far not been successful. In ordinary thick ISOL targets, their radioisotopes produced in the target are stopped within the condensed target material and have to diffuse through a solid material. Here, we present a concept which overcomes limitations associated with this method. We exploit the recoil momentum of nuclear reaction products for their release from the solid target material. They are thermalized in a carbon monoxide-containing atmosphere, in which volatile carbonyl complexes form readily at ambient temperature and pressure. This compound serves as volatile carrier for transport to the ion source. Excess carbon monoxide is removed by cryogenic gas separation to enable low pressures in the source region, in which the species are ionized and hence made available for radioactive ion beam formation. The setup is operated in batch mode, with the aim to extract isotopes having half-lives of at least several seconds. We report parameter studies of the key processes of the method, which validate this concept and which define the parameters for the setup. This would allow for the first time the extraction of radioactive molybdenum, tungsten and several other transition metals at thick-target ISOL facilities.
Published: 2021
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9. Simulation and Experimental Study of Proton Bunch Self-Modulation in Plasma with Linear Density Gradients

Author: Guzmán, P. I. Morales, Muggli, P., Agnello, R., Ahdida, C. C., Aladi, M., Goncalves, M. C. Amoedo, Andrebe, Y., Apsimon, O., Apsimon, R., Bachmann, A. -M., Baistrukov, M. A., Batsch, F., Bergamaschi, M., Blanchard, P., Braunmüller, F., Burrows, P. N., Buttenschön, B., Caldwell, A., Chappell, J., Chevallay, E., Chung, M., Cooke, D. A., Damerau, H., Davut, C., Demeter, G., Dexter, A., Doebert, S., Farmer, J., Fasoli, A., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Furno, I., Gessner, S., Gorn, A. A., Granados, E., Granetzny, M., Graubner, T., Grulke, O., Gschwendtner, E., Guran, E. D., Hafych, V., Henderson, J. R., Hüther, M., Kedves, M. Á., Khudyakov, V., Kim, S. -Y., Kraus, F., Krupa, M., Lefevre, T., Liang, L., Lopes, N., Lotov, K. V., Martyanov, M., Mazzoni, S., Godoy, D. Medina, Moody, J. T., Moon, K., Moreira, M., Nechaeva, T., Nowak, E., Pakuza, C., Panuganti, H., Pardons, A., Perera, A., Pucek, J., Pukhov, A., Ráczkevi, B., Ramjiawan, R. L., Rey, S., Schmitz, O., Senes, E., Silva, L. O., Stollberg, C., Sublet, A., Topaloudis, A., Torrado, N., Tuev, P. V., Turner, M., Velotti, F., Verra, L., Vieira, J., Vincke, H., Welsch, C. P., Wendt, M., Wing, M., Wolfenden, J., Woolley, B., Xia, G., Zepp, M., and Della Porta, G. Zevi
Subjects: Physics - Plasma Physics, Physics - Accelerator Physics
Abstract: We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported in arXiv:2007.14894v2: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency varies with gradient. Simulation results show that dephasing of the wakefields with respect to the relativistic protons along the plasma is the main cause for the loss of charge. The study of the modulation frequency reveals details about the evolution of the self-modulation process along the plasma. In particular for negative gradients, the modulation frequency across time-resolved images of the bunch indicates the position along the plasma where protons leave the wakefields. Simulations and experimental results are in excellent agreement., Comment: 13 pages, 11 figures
Published: 2021
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10. Long range propagation of ultrafast, ionizing laser pulses in a resonant nonlinear medium

Author: Demeter, G., Moody, J. T., Aladi, M., Bachmann, A. -M., Batsch, F., Braunmuller, F., Djotyan, G. P., Fedosseev, V., Friebel, F., Gessner, S., Granados, E., Guran, E., Huther, M., Kedves, M. A., Martyanov, M., Muggli, P., Oz, E., Panuganti, H., Raczkevi, B., Verra, L., and Della Porta, G. Zevi
Subjects: Physics - Optics, Physics - Plasma Physics
Abstract: We study the propagation of 0.05-1 TW power, ultrafast laser pulses in a 10 meter long rubidium vapor cell. The central wavelength of the laser is resonant with the $D_2$ line of rubidium and the peak intensity in the $10^{12}-10^{14} ~W/cm^2$ range, enough to create a plasma channel with single electron ionization. We observe the absorption of the laser pulse for low energy, a regime of transverse confinement of the laser beam by the strong resonant nonlinearity for higher energies and the transverse broadening of the output beam when the nonlinearity is saturated due to full medium ionization. We compare experimental observations of transmitted pulse energy and transverse fluence profile with the results of computer simulations modeling pulse propagation. We find a qualitative agreement between theory and experiment that corroborates the validity of our propagation model. While the quantitative differences are substantial, the results show that the model can be used to interpret the observed phenomena in terms of self-focusing and channeling of the laser pulses by the saturable nonlinearity and the transparency of the fully ionized medium along the propagation axis., Comment: 12 pages, 10 Figures
Published: 2021
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11. Laser spectroscopy of neutron-rich $^{207,208}$Hg isotopes: Illuminating the kink and odd-even staggering in charge radii across the $N=126$ shell closure

Author: Goodacre, T. Day, Afanasjev, A. V., Barzakh, A. E., Marsh, B. A., Sels, S., Ring, P., Nakada, H., Andreyev, A. N., Van Duppen, P., Althubiti, N. A., Andel, B., Atanasov, D., Billowes, J., Blaum, K., Cocolios, T. E., Cubiss, J. G., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Flanagan, K. T., Ganey, L. P., Ghys, L., Huyse, M., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Palenzuela, Y. Martinez, Molkanov, P. L., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Spagnoletti, P., Van Beveren, C., Veinhard, M., Verstraelen, E., Welker, A., Wendt, K., Wienholtz, F., Wolf, R. N., Zadvornaya, A., and Zuber, K.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: The mean-square charge radii of $^{207,208}$Hg ($Z=80, N=127,128$) have been studied for the first time and those of $^{202,203,206}$Hg ($N=122,123,126$) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic \textit{kink} in the charge radii at the $N=126$ neutron shell closure has been revealed, providing the first information on its behavior below the $Z=82$ proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and non-relativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at $N=126$ and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level, and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-$A$ nuclei, facilitated by particle-vibration coupling for odd-$A$ nuclei., Comment: 7 pages, 5 figures, Physical Review C, in press
Published: 2020
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12. Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma

Author: Batsch, F., Muggli, P., Agnello, R., Ahdida, C. C., Goncalves, M. C. Amoedo, Andrebe, Y., Apsimon, O., Apsimon, R., Bachmann, A. -M., Baistrukov, M. A., Blanchard, P., Braunmüller, F., Burrows, P. N., Buttenschön, B., Caldwell, A., Chappell, J., Chevallay, E., Chung, M., Cooke, D. A., Damerau, H., Davut, C., Demeter, G., Deubner, H. L., Doebert, S., Farmer, J., Fasoli, A., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Friebel, F., Furno, I., Garolfi, L., Gessner, S., Gorgisyan, I., Gorn, A. A., Granados, E., Granetzny, M., Graubner, T., Grulke, O., Gschwendtner, E., Hafych, V., Helm, A., Henderson, J. R., Hüther, M., Kargapolov, I. Yu., Kim, S. -Y., Kraus, F., Krupa, M., Lefevre, T., Liang, L., Liu, S., Lopes, N., Lotov, K. V., Martyanov, M., Mazzoni, S., Godoy, D. Medina, Minakov, V. A., Moody, J. T., Moon, K., Guzmán, P. I. Morales, Moreira, M., Nechaeva, T., Nowak, E., Pakuza, C., Panuganti, H., Pardons, A., Perera, A., Pucek, J., Pukhov, A., Ramjiawan, R. L., Rey, S., Rieger, K., Schmitz, O., Senes, E., Silva, L. O., Speroni, R., Spitsyn, R. I., Stollberg, C., Sublet, A., Topaloudis, A., Torrado, N., Tuev, P. V., Turner, M., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Vincke, H., Welsch, C. P., Wendt, M., Wing, M., Wiwattananon, P., Wolfenden, J., Woolley, B., Xia, G., Zepp, M., and Della Porta, G. Zevi
Subjects: Physics - Plasma Physics, Physics - Accelerator Physics
Abstract: We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude ($\ge(4.1\pm0.4)$ MV/m), the phase of the modulation along the bunch is reproducible from event to event, with 3 to 7% (of 2$\pi$) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated., Comment: Letter and Supplemental Material, 6 figures, 8 pages
Published: 2020
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13. Experimental study of extended timescale dynamics of a plasma wakefield driven by a self-modulated proton bunch

Author: Chappell, J., Adli, E., Agnello, R., Aladi, M., Andrebe, Y., Apsimon, O., Apsimon, R., Bachmann, A. -M., Baistrukov, M. A., Batsch, F., Bergamaschi, M., Blanchard, P., Burrows, P. N., Buttenschön, B., Caldwell, A., Chevallay, E., Chung, M., Cooke, D. A., Damerau, H., Davut, C., Demeter, G., Deubner, L. H., Dexter, A., Djotyan, G. P., Doebert, S., Farmer, J., Fasoli, A., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Friebel, F., Turno, I., Garolfi, L., Gessner, S., Goddard, B., Gorgisyan, I., Gorn, A. A., Granados, E., Granetzny, M., Grulke, O., Gschwendtner, E., Hafych, V., Hartin, A., Helm, A., Henderson, J. R., Howling, A., Hüther, M., Jacquier, R., Jolly, S., Kargapolov, I. Yu., Kedves, M. Á., Keeble, F., Kelisani, M. D., Kim, S. -Y., Kraus, F., Krupa, M., Lefevre, T., Li, Y., Liang, L., Liu, S., Lopes, N., Lotov, K. V., Martyanov, M., Mazzoni, S., Godoy, D. Medina, Minakov, V. A., Moody, J. T., Guzmán, P. I. Morales, Moreira, M., Panuganti, H., Pardons, A., Asmus, F. Peña, Perera, A., Petrenko, A., Pucek, J., Pukhov, A., Ráczkevi, B., Ramjiawan, R. L., Rey, S., Ruhl, H., Saberi, H., Schmitz, O., Senes, E., Sherwood, P., Silva, L. O., Spitsyn, R. I., Tuev, P. V., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Welsch, C. P., Williamson, B., Wing, M., Wolfenden, J., Woolley, B., Dia, G., Zepp, M., and Della Porta, G. Zevi
Subjects: Physics - Plasma Physics, Physics - Accelerator Physics
Abstract: Plasma wakefield dynamics over timescales up to 800 ps, approximately 100 plasma periods, are studied experimentally at the Advanced Wakefield Experiment (AWAKE). The development of the longitudinal wakefield amplitude driven by a self-modulated proton bunch is measured using the external injection of witness electrons that sample the fields. In simulation, resonant excitation of the wakefield causes plasma electron trajectory crossing, resulting in the development of a potential outside the plasma boundary as electrons are transversely ejected. Trends consistent with the presence of this potential are experimentally measured and their dependence on wakefield amplitude are studied via seed laser timing scans and electron injection delay scans., Comment: 11 pages, 8 figures
Published: 2020
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14. Proton beam defocusing in AWAKE: comparison of simulations and measurements

Author: Gorn, A. A., Turner, M., Adli, E., Agnello, R., Aladi, M., Andrebe, Y., Apsimon, O., Apsimon, R., Bachmann, A. -M., Baistrukov, M. A., Batsch, F., Bergamaschi, M., Blanchard, P., Burrows, P. N., Buttenschon, B., Caldwell, A., Chappell, J., Chevallay, E., Chung, M., Cooke, D. A., Damerau, H., Davut, C., Demeter, G., Deubner, L. H., Dexter, A., Djotyan, G. P., Doebert, S., Farmer, J., Fasoli, A., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Friebel, F., Furno, I., Garolfi, L., Gessner, S., Goddard, B., Gorgisyan, I., Granados, E., Granetzny, M., Grulke, O., Gschwendtner, E., Hafych, V., Hartin, A., Helm, A., Henderson, J. R., Howling, A., Huther, M., Jacquier, R., Kargapolov, I. Yu., Kedves, M. A., Keeble, F., Kelisani, M. D., Kim, S. -Y., Kraus, F., Krupa, M., Lefevre, T., Liang, L., Liu, S., Lopes, N., Lotov, K. V., Martyanov, M., Mazzoni, S., Godoy, D. Medina, Minakov, V. A., Moody, J. T., Guzman, P. I. Morales, Moreira, M., Nechaeva, T., Panuganti, H., Pardons, A., Asmus, F. Pena, Perera, A., Petrenko, A., Pucek, J., Pukhov, A., Raczkevi, B., Ramjiawan, R. L., Rey, S., Ruhl, H., Saberi, H., Schmitz, O., Senes, E., Sherwood, P., Silva, L. O., Spitsyn, R. I., Tuev, P. V., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Welsch, C. P., Williamson, B., Wing, M., Wolfenden, J., Woolley, B., Xia, G., Zepp, M., and Della Porta, G. Zevi
Subjects: Physics - Accelerator Physics, Physics - Plasma Physics
Abstract: In 2017, AWAKE demonstrated the seeded self-modulation (SSM) of a 400 GeV proton beam from the Super Proton Synchrotron (SPS) at CERN. The angular distribution of the protons deflected due to SSM is a quantitative measure of the process, which agrees with simulations by the two-dimensional (axisymmetric) particle-in-cell code LCODE. Agreement is achieved for beam populations between $10^{11}$ and $3 \times 10^{11}$ particles, various plasma density gradients ($-20 \div 20\%$) and two plasma densities ($2\times 10^{14} \text{cm}^{-3}$ and $7 \times 10^{14} \text{cm}^{-3}$). The agreement is reached only in the case of a wide enough simulation box (at least five plasma wavelengths)., Comment: 8 pages, 9 figures, 1 table
Published: 2020

15. Detailed spectroscopy of doubly magic $^{132}$Sn

Author: Benito, J., Fraile, L. M., Korgul, A., Piersa, M., Adamska, E., Andreyev, A. N., Álvarez-Rodríguez, R., Barzakh, A. E., Benzoni, G., Berry, T., Borge, M. J. G., Carmona, M., Chrysalidis, K., Costache, C., Cubiss, J. G., Goodacre, T. Day, De Witte, H., Fedorov, D. V., Fedosseev, V. N., Fernández-Martínez, G., Fijałkowska, A., Fila, M., Fynbo, H., Galaviz, D., Galve, P., García-Díez, M., Greenlees, P. T., Grzywacz, R., Harkness-Brennan, L. J., Henrich, C., Huyse, M., Ibáñez, P., Illana, A., Janas, Z., Jolie, J., Judson, D. S., Karayonchev, V., Kicinska-Habior, M., Konki, J., Kurcewicz, J., Lazarus, I., Lica, R., López-Montes, A., Lund, M., Mach, H., Madurga, M., Marroquín, I., Marsh, B., Martínez, M. C., Mazzocchi, C., Marginean, N., Marginean, R., Miernik, K., Mihai, C., Mihai, R. E., Nácher, E., Negret, A., Olaizola, B., Page, R. D., Paulauskas, S. V., Pascu, S., Perea, A., Pucknell, V., Rahkila, P., Raison, C., Rapisarda, E., Régis, J. -M., Rezynkina, K., Rotaru, F., Rothe, S., Sánchez-Parcerisa, D., Sánchez-Tembleque, V., Schomacker, K., Simpson, G. S., Sotty, Ch., Stan, L., Stanoiu, M., Stryjczyk, M., Tengblad, O., Turturica, A., Udías, J. M., Van Duppen, P., Vedia, V., Villa-Abaunza, A., Viñals, S., Walters, W. B., Wadsworth, R., and Warr, N.
Subjects: Nuclear Experiment
Abstract: The structure of the doubly magic $^{132}_{50}$Sn$_{82}$ has been investigated at the ISOLDE facility at CERN, populated both by the $\beta^-$decay of $^{132}$In and $\beta^-$-delayed neutron emission of $^{133}$In. The level scheme of $^{132}$Sn is greatly expanded with the addition of 68 $\gamma$-transitions and 17 levels observed for the first time in the $\beta$ decay. The information on the excited structure is completed by new $\gamma$-transitions and states populated in the $\beta$-n decay of $^{133}$In. Improved delayed neutron emission probabilities are obtained both for $^{132}$In and $^{133}$In. Level lifetimes are measured via the Advanced Time-Delayed $\beta\gamma\gamma$(t) fast-timing method. An interpretation of the level structure is given based on the experimental findings and the particle-hole configurations arising from core excitations both from the \textit{N} = 82 and \textit{Z} = 50 shells, leading to positive and negative parity particle-hole multiplets. The experimental information provides new data to challenge the theoretical description of $^{132}$Sn., Comment: 19 pages, 11 figures. Accepted for publication in Phys. Rev. C
Published: 2020
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16. Production of innovative radionuclides for medical applications at the CERN-MEDICIS facility

Author: Bernerd, C., Johnson, J.D., Aubert, E., Au, M., Barozier, V., Bernardes, A.-P., Bertreix, P., Bruchertseifer, F., Catherall, R., Chevallay, E., Chrysalidis, K., Christodoulou, P., Cocolios, T.E., Crepieux, B., Deschamps, M., Dorsival, A., Duchemin, C., Fedosseev, V., Fernier, P., Heines, M., Heinke, R., Khalid, U., Khan, M., Khan, Q., Lambert, L., Mamis, E., Marsh, B.A., Marzari, S., Menaa, N., Munos, M., Pozzi, F., Prvakova, S., Ramos, J.P., Riccardi, F., Rinchet, J.-Y., Rossel, R.E., Stora, T., Thiboud, J., Vollaire, J., Van Den Bergh, V., and Wojtaczka, W.
Published: 2023
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17. An alternative approach to populate and study the $^{229}$Th nuclear clock isomer

Author: Verlinde, M., Kraemer, S., Moens, J., Chrysaldis, K., Correia, J. G., Cottenier, S., De Witte, H., Fedorov, D. V., Fedosseev, V. N, Ferrer, R., Fraile, L. M., Geldhof, S., Granados, C. A., Laatiaoui, M., Lima, T. A. L., Lin, P-C, Manea, V., Marsh, B. A., Moore, I., Pereira, L. M. C., Raeder, S., Bergh, P. Van den, Van Duppen, P., Vantomme, A., Verstraelen, E., Wahl, U., and Wilkins, S. G.
Subjects: Nuclear Experiment
Abstract: A new approach to observe the radiative decay of the $^{229}$Th nuclear isomer, and to determine its energy and radiative lifetime, is presented. Situated at a uniquely low excitation energy, this nuclear state might be a key ingredient for the development of a nuclear clock, a nuclear laser and the search for time variations of the fundamental constants. The isomer's $\gamma$ decay towards the ground state will be studied with a high-resolution VUV spectrometer after its production by the $\beta$ decay of $^{229}$Ac. The novel production method presents a number of advantages asserting its competitive nature with respect to the commonly used $^{233}$U $\alpha$-decay recoil source. In this paper, a feasibility analysis of this new concept, and an experimental investigation of its key ingredients, using a pure $^{229}$Ac ion beam produced at the ISOLDE radioactive beam facility, is reported., Comment: 11 pages, 5 figures, 2 tables
Published: 2019
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18. Gamma Factory at CERN -- novel research tools made of light

Author: Placzek, W., Abramov, A., Alden, S. E., Fernandez, R. Alemany, Antsiferov, P. S., Apyan, A., Bartosik, H., Bessonov, E. G., Biancacci, N., Bieron, J., Bogacz, A., Bosco, A., Bruce, R., Budker, D., Cassou, K., Castelli, F., Chaikovska, I., Curatolo, C., Czodrowski, P., Derevianko, A., Dupraz, K., Dutheil, Y., Dzierzega, K., Fedosseev, V., Martinez, N. Fuster, Gibson, S. M., Goddard, B., Gorzawski, A., Hirlander, S., Jowett, J., Kersevan, R., Kowalska, M., Krasny, M. W., Kroeger, F., Lamont, M., Lefevre, T., Manglunki, D., Marsh, B., Martens, A., Molson, J., Nutarelli, D., Nevay, L. J., Petrenko, A., Petrillo, V., Radaelli, S., Pustelny, S., Rochester, S., Sapinski, M., Schaumann, M., Serafini, L., Shevelko, V. P., Stoehlker, T., Surzhikov, A., Tolstikhina, I., Velotti, F., Weber, G., Wu, Y. K., Yin-Vallgren, C., Zanetti, M., Zimmermann, F., Zolotorev, M. S., and Zomer, F.
Subjects: Physics - Accelerator Physics, Physics - Instrumentation and Detectors
Abstract: We discuss the possibility of creating novel research tools by producing and storing highly relativistic beams of highly ionised atoms in the CERN accelerator complex, and by exciting their atomic degrees of freedom with lasers to produce high-energy photon beams. Intensity of such photon beams would be by several orders of magnitude higher than offered by the presently operating light sources, in the particularly interesting gamma-ray energy domain of 0.1-400 MeV. In this energy range, the high-intensity photon beams can be used to produce secondary beams of polarised electrons, polarised positrons, polarised muons, neutrinos, neutrons and radioactive ions. New research opportunities in a wide domain of fundamental and applied physics can be opened by the Gamma Factory scientific programme based on the above primary and secondary beams., Comment: 12 pages; presented by W. Placzek at the XXV Cracow Epiphany Conference on Advances in Heavy Ion Physics, 8-11 January 2019, Cracow, Poland
Published: 2019
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19. Shape staggering of mid-shell mercury isotopes from in-source laser spectroscopy compared with Density Functional Theory and Monte Carlo Shell Model calculations

Author: Sels, S., Goodacre, T. Day, Marsh, B. A., Pastore, A., Ryssens, W., Tsunoda, Y., Althubiti, N., Andel, B., Andreyev, A. N., Atanasov, D., Barzakh, A. E., Bender, M., Billowes, J., Blaum, K., Cocolios, T. E., Cubiss, J. G., Dobaczewski, J., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Flanagan, K. T., Gaffney, L. P., Ghys, L., Heenen, P-H., Huyse, M., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Palenzuela, Y. Martinez, Medonca, T. M., Molkanov, P. L., Otsuka, T., Ramos, J. P., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Spagnoletti, P., Van Beveren, C., Van Duppen, P., Veinhard, M., Verstraelen, E., Welker, A., Wendt, K., Wienholtz, F., Wolf, R. N., and Zadvornaya, A.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: Neutron-deficient $^{177-185}$Hg isotopes were studied using in-source laser resonance-ionization spectroscopy at the CERN-ISOLDE radioactive ion-beam facility, in an experiment combining different detection methods tailored to the studied isotopes. These include either alpha-decay tagging or Multi-reflection Time-of-Flight gating to identify the isotopes of interest. The endpoint of the odd-even nuclear shape staggering in mercury was observed directly by measuring for the first time the isotope shifts and hyperfine structures of $^{177-180}$Hg. Changes in the mean-square charge radii for all mentioned isotopes, magnetic dipole and electric quadrupole moments of the odd-A isotopes and arguments in favor of $I = 7/2$ spin assignment for $^{177,179}$Hg were deduced. Experimental results are compared with Density Functional Theory (DFT) and Monte-Carlo Shell Model (MCSM) calculations. DFT calculations with several Skyrme parameterizations predict a large jump in the charge radius around the neutron $N = 104$ mid shell, with an odd-even staggering pattern related to the coexistence of nearly-degenerate oblate and prolate minima. This near-degeneracy is highly sensitive to many aspects of the effective interaction, a fact that renders perfect agreement with experiment out of reach for current functionals. Despite this inherent diffculty, the SLy5s1 and a modified UNEDF1^{SO} parameterization predict a qualitatively correct staggering that is off by two neutron numbers. MCSM calculations of states with the experimental spins and parities show good agreement for both electromagnetic moments and the observed charge radii. A clear mechanism for the origin of shape staggering within this context is identified: a substantial change in occupancy of the proton $\pi h_{9/2}$ and neutron $\nu i_{13/2}$ orbitals., Comment: 19 pages, 18 figures
Published: 2019
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20. $\beta^-$ decay study of the $^{66}$Mn - $^{66}$Fe - $^{66}$Co - $^{66}$Ni chain

Author: Stryjczyk, M., Tsunoda, Y., Darby, I. G., De Witte, H., Diriken, J., Fedorov, D. V., Fedosseev, V. N., Fraile, L. M., Huyse, M., Köster, U., Marsh, B. A., Otsuka, T., Pauwels, D., Popescu, L., Radulov, D., Seliverstov, M. D., Sjödin, A. M., Bergh, P. Van den, Van Duppen, P., Venhart, M., Walters, W. B., and Wimmer, K.
Subjects: Nuclear Experiment, Nuclear Theory
Abstract: Background: Shell evolution can impact the structure of the nuclei and lead to effects such as shape coexistence. The nuclei around $^{68}$Ni represent an excellent study case, however, spectroscopic information of the neutron-rich, $Z<28$ nuclei is limited. Purpose: The goal is to measure $\gamma$-ray transitions in $^{66}$Fe, $^{66}$Co and $^{66}$Ni populated in the $\beta^-$ decay of $^{66}$Mn, to determine absolute $\beta$-feedings and relative $\gamma$-decay probabilities and to compare the results with Monte Carlo Shell Model calculations in order to study the influence of the relevant single neutron and proton orbitals occupancies around $Z=28$ and $N=40$. Method: The low-energy structures of $^{65,66}$Fe, $^{66}$Co and $^{66}$Ni were studied in the $\beta^-$ decay of $^{66}$Mn produced at ISOLDE, CERN. The beam was purified by means of laser resonance ionization and mass separation. The $\beta$ and $\gamma$ events detected by three plastic scintillators and two MiniBall cluster germanium detectors, respectively, were correlated in time to build the low-energy excitation schemes and to determine the $\beta$-decay half-lives of the nuclei. Results: The relative small $\beta$-decay ground state feeding of $^{66}$Fe obtained in this work is at variant to the earlier studies. Spin and parity $1^+$ was assigned to the $^{66}$Co ground state based on the strong ground state feeding in the decay of $^{66}$Fe as well as in the decay of $^{66}$Co. Experimental log(ft) values, $\gamma$-ray deexcitation patterns and energies of excited states were compared to Monte Carlo Shell Model calculations. Based on this comparison, spin and parity assignments for the selected number of low-lying states in the $^{66}$Mn to $^{66}$Ni chain were proposed. Conclusions: The $\beta$-decay chain starting $^{66}$Mn towards $^{66}$Ni, crossing $N=40$, evolves from deformed nuclei to sphericity..., Comment: accepted for publication in PRC
Published: 2018
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21. The Compact Linear Collider (CLIC) - 2018 Summary Report

Author: CLIC, The, collaborations, CLICdp, Charles, T. K., Giansiracusa, P. J., Lucas, T. G., Rassool, R. P., Volpi, M., Balazs, C., Afanaciev, K., Makarenko, V., Patapenka, A., Zhuk, I., Collette, C., Boland, M. J., Hoffman, A. C. Abusleme, Diaz, M. A., Garay, F., Chi, Y., He, X., Pei, G., Pei, S., Shu, G., Wang, X., Zhang, J., Zhao, F., Zhou, Z., Chen, H., Gao, Y., Huang, W., Kuang, Y. P., Li, B., Li, Y., Meng, X., Shao, J., Shi, J., Tang, C., Wang, P., Wu, X., Zha, H., Ma, L., Han, Y., Fang, W., Gu, Q., Huang, D., Huang, X., Tan, J., Wang, Z., Zhao, Z., Uggerhøj, U. I., Wistisen, T. N., Aabloo, A., Aare, R., Kuppart, K., Vigonski, S., Zadin, V., Aicheler, M., Baibuz, E., Brücken, E., Djurabekova, F., Eerola, P., Garcia, F., Haeggström, E., Huitu, K., Jansson, V., Kassamakov, I., Kimari, J., Kyritsakis, A., Lehti, S., Meriläinen, A., Montonen, R., Nordlund, K., Österberg, K., Saressalo, A., Väinölä, J., Veske, M., Farabolini, W., Mollard, A., Peauger, F., Plouin, J., Bambade, P., Chaikovska, I., Chehab, R., Delerue, N., Davier, M., Faus-Golfe, A., Irles, A., Kaabi, W., LeDiberder, F., Pöschl, R., Zerwas, D., Aimard, B., Balik, G., Blaising, J. -J., Brunetti, L., Chefdeville, M., Dominjon, A., Drancourt, C., Geoffroy, N., Jacquemier, J., Jeremie, A., Karyotakis, Y., Nappa, J. M., Serluca, M., Vilalte, S., Vouters, G., Bernhard, A., Bründermann, E., Casalbuoni, S., Hillenbrand, S., Gethmann, J., Grau, A., Huttel, E., Müller, A. -S., Peiffer, P., Perić, I., de Jauregui, D. Saez, Emberger, L., Graf, C., Simon, F., Szalay, M., van der Kolk, N., Brass, S., Kilian, W., Alexopoulos, T., Apostolopoulos, T., Gazis, E. N., Gazis, N., Kostopoulos, V., Kourkoulis, S., Heilig, B., Lichtenberger, J., Shrivastava, P., Dayyani, M. K., Ghasem, H., Hajari, S. S., Shaker, H., Ashkenazy, Y., Popov, I., Engelberg, E., Yashar, A., Abramowicz, H., Benhammou, Y., Borysov, O., Borysova, M., Levy, A., Levy, I., Alesini, D., Bellaveglia, M., Buonomo, B., Cardelli, A., Diomede, M., Ferrario, M., Gallo, A., Ghigo, A., Giribono, A., Piersanti, L., Stella, A., Vaccarezza, C., de Blas, J., Franceschini, R., D'Auria, G., Di Mitri, S., Abe, T., Aryshev, A., Fukuda, M., Furukawa, K., Hayano, H., Higashi, Y., Higo, T., Kubo, K., Kuroda, S., Matsumoto, S., Michizono, S., Naito, T., Okugi, T., Shidara, T., Tauchi, T., Terunuma, N., Urakawa, J., Yamamoto, A., Raboanary, R., Luiten, O. J., Stragier, X. F. D., Hart, R., van der Graaf, H., Eigen, G., Adli, E., Lindstrøm, C. A., Lillestøl, R., Malina, L., Pfingstner, J., Sjobak, K. N., Ahmad, A., Hoorani, H., Khan, W. A., Bugiel, S., Bugiel, R., Firlej, M., Fiutowski, T. A., Idzik, M., Moroń, J., Świentek, K. P., de Renstrom, P. Brückman, Krupa, B., Kucharczyk, M., Lesiak, T., Pawlik, B., Sopicki, P., Turbiarz, B., Wojtoń, T., Zawiejski, L. K., Kalinowski, J., Nowak, K., Żarnecki, A. F., Firu, E., Ghenescu, V., Neagu, A. T., Preda, T., Zgura, I. S., Aloev, A., Azaryan, N., Boyko, I., Budagov, J., Chizhov, M., Filippova, M., Glagolev, V., Gongadze, A., Grigoryan, S., Gudkov, D., Karjavine, V., Lyablin, M., Nefedov, Yu., Olyunin, A., Rymbekova, A., Samochkine, A., Sapronov, A., Shelkov, G., Shirkov, G., Soldatov, V., Solodko, E., Trubnikov, G., Tyapkin, I., Uzhinsky, V., Vorozhtov, A., Zhemchugov, A., Levichev, E., Mezentsev, N., Piminov, P., Shatilov, D., Vobly, P., Zolotarev, K., Jelisavčić, I. Božović, Kačarević, G., Dumbelović, G. Milutinović, Pandurović, M., Radulović, M., Stevanović, J., Vukasinović, N., Lee, D. -H., Ayala, N., Benedetti, G., Guenzel, T., Iriso, U., Marti, Z., Perez, F., Pont, M., Trenado, J., Ruiz-Jimeno, A., Vila, I., Calero, J., Dominguez, M., Garcia-Tabares, L., Gavela, D., Lopez, D., Toral, F., Gutierrez, C. Blanch, Boronat, M., Esperante, D., Fullana, E., Fuster, J., García, I., Gimeno, B., Lopez, P. Gomis, González, D., Perelló, M., Ros, E., Villarejo, M. A., Vnuchenko, A., Vos, M., Borgmann, Ch., Brenner, R., Ekelöf, T., Jacewicz, M., Olvegård, M., Ruber, R., Ziemann, V., Aguglia, D., Gonzalvo, J. Alabau, Leon, M. Alcaide, Tehrani, N. Alipour, Anastasopoulos, M., Andersson, A., Andrianala, F., Antoniou, F., Apyan, A., Arominski, D., Artoos, K., Assly, S., Atieh, S., Baccigalupi, C., Sune, R. Ballabriga, Caballero, D. Banon, Barnes, M. J., Garcia, J. Barranco, Bartalesi, A., Bauche, J., Bayar, C., Belver-Aguilar, C., Morell, A. Benot, Bernardini, M., Bett, D. R., Bettoni, S., Bettencourt, M., Bielawski, B., Garcia, O. Blanco, Kraljevic, N. Blaskovic, Bolzon, B., Bonnin, X. A., Bozzini, D., Branger, E., Brondolin, E., Brunner, O., Buckland, M., Bursali, H., Burkhardt, H., Caiazza, D., Calatroni, S., Campbell, M., Lasheras, N. Catalan, Cassany, B., Castro, E., Soares, R. H. Cavaleiro, Bastos, M. Cerqueira, Cherif, A., Chevallay, E., Cilento, V., Corsini, R., Costa, R., Cure, B., Curt, S., Gobbo, A. Dal, Dannheim, D., Daskalaki, E., Deacon, L., Degiovanni, A., De Michele, G., De Oliveira, L., Romano, V. Del Pozo, Delahaye, J. P., Delikaris, D., de Almeida, P. G. Dias, Dobers, T., Doebert, S., Doytchinov, I., Draper, M., Ramos, F. Duarte, Duquenne, M., Plaja, N. Egidos, Elsener, K., Esberg, J., Esposito, M., Evans, L., Fedosseev, V., Ferracin, P., Fiergolski, A., Foraz, K., Fowler, A., Friebel, F., Fuchs, J-F., Gaddi, A., Gamba, D., Fajardo, L. Garcia, Morales, H. Garcia, Garion, C., Gasior, M., Gatignon, L., Gayde, J-C., Gerbershagen, A., Gerwig, H., Giambelli, G., Gilardi, A., Goldblatt, A. N., Anton, S. Gonzalez, Grefe, C., Grudiev, A., Guerin, H., Guillot-Vignot, F. G., Gutt-Mostowy, M. L., Lutz, M. Hein, Hessler, C., Holma, J. K., Holzer, E. B., Hourican, M., Hynds, D., Ikarios, E., Levinsen, Y. Inntjore, Janssens, S., Jeff, A., Jensen, E., Jonker, M., Kamugasa, S. W., Kastriotou, M., Kemppinen, J. M. K., Khan, V., Kieffer, R. B., Klempt, W., Kokkinis, N., Kossyvakis, I., Kostka, Z., Korsback, A., Platia, E. Koukovini, Kovermann, J. W., Kozsar, C-I., Kremastiotis, I., Kröger, J., Kulis, S., Latina, A., Leaux, F., Lebrun, P., Lefevre, T., Leogrande, E., Linssen, L., Liu, X., Cudie, X. Llopart, Magnoni, S., Maidana, C., Maier, A. A., Durand, H. Mainaud, Mallows, S., Manosperti, E., Marelli, C., Lacoma, E. Marin, Marsh, S., Martin, R., Martini, I., Martyanov, M., Mazzoni, S., Mcmonagle, G., Mether, L. M., Meynier, C., Modena, M., Moilanen, A., Mondello, R., Cabral, P. B. Moniz, Irazabal, N. Mouriz, Munker, M., Muranaka, T., Nadenau, J., Navarro, J. G., Quirante, J. L. Navarro, Del Busto, E. Nebo, Nikiforou, N., Ninin, P., Nonis, M., Nisbet, D., Nuiry, F. X., Nürnberg, A., Ögren, J., Osborne, J., Ouniche, A. C., Pan, R., Papadopoulou, S., Papaphilippou, Y., Paraskaki, G., Pastushenko, A., Passarelli, A., Patecki, M., Pazdera, L., Pellegrini, D., Pepitone, K., Codina, E. Perez, Fontenla, A. Perez, Persson, T. H. B., Petrič, M., Pitman, S., Pitters, F., Pittet, S., Plassard, F., Popescu, D., Quast, T., Rajamak, R., Redford, S., Remandet, L., Renier, Y., Rey, S. F., Orozco, O. Rey, Riddone, G., Castro, E. Rodriguez, Roloff, P., Rossi, C., Rossi, F., Rude, V., Ruehl, I., Rumolo, G., Sailer, A., Sandomierski, J., Santin, E., Sanz, C., Bedolla, J. Sauza, Schnoor, U., Schmickler, H., Schulte, D., Senes, E., Serpico, C., Severino, G., Shipman, N., Sicking, E., Simoniello, R., Skowronski, P. K., Mompean, P. Sobrino, Soby, L., Sollander, P., Solodko, A., Sosin, M. P., Spannagel, S., Sroka, S., Stapnes, S., Sterbini, G., Stern, G., Ström, R., Stuart, M. J., Syratchev, I., Szypula, K., Tecker, F., Thonet, P. A., Thrane, P., Timeo, L., Tiirakari, M., Garcia, R. Tomas, Tomoiaga, C. I., Valerio, P., Vaňát, T., Vamvakas, A. L., Van Hoorne, J., Viazlo, O., Pinto, M. Vicente Barreto, Vitoratou, N., Vlachakis, V., Weber, M. A., Wegner, R., Wendt, M., Widorski, M., Williams, O. E., Williams, M., Woolley, B., Wuensch, W., Wulzer, A., Uythoven, J., Xydou, A., Yang, R., Zelios, A., Zhao, Y., Zisopoulos, P., Benoit, M., Sultan, D M S, Riva, F., Bopp, M., Braun, H. H., Craievich, P., Dehler, M., Garvey, T., Pedrozzi, M., Raguin, J. Y., Rivkin, L., Zennaro, R., Guillaume, S., Rothacher, M., Aksoy, A., Nergiz, Z., Yavas, Ö., Denizli, H., Keskin, U., Oyulmaz, K. Y., Senol, A., Ciftci, A. K., Baturin, V., Karpenko, O., Kholodov, R., Lebed, O., Lebedynskyi, S., Mordyk, S., Musienko, I., Profatilova, Ia., Storizhko, V., Bosley, R. R., Price, T., Watson, M. F., Watson, N. K., Winter, A. G., Goldstein, J., Green, S., Marshall, J. S., Thomson, M. A., Xu, B., You, T., Gillespie, W. A., Spannowsky, M., Beggan, C., Martin, V., Zhang, Y., Protopopescu, D., Robson, A., Apsimon, R. J., Bailey, I., Burt, G. C., Dexter, A. C., Edwards, A. V., Hill, V., Jamison, S., Millar, W. L., Papke, K., Casse, G., Vossebeld, J., Aumeyr, T., Bergamaschi, M., Bobb, L., Bosco, A., Boogert, S., Boorman, G., Cullinan, F., Gibson, S., Karataev, P., Kruchinin, K., Lekomtsev, K., Lyapin, A., Nevay, L., Shields, W., Snuverink, J., Towler, J., Yamakawa, E., Boisvert, V., West, S., Jones, R., Joshi, N., Bett, D., Bodenstein, R. M., Bromwich, T., Burrows, P. N., Christian, G. B., Gohil, C., Korysko, P., Paszkiewicz, J., Perry, C., Ramjiawan, R., Roberts, J., Coates, T., Salvatore, F., Bainbridge, A., Clarke, J. A., Krumpa, N., Shepherd, B. J. A., Walsh, D., Chekanov, S., Demarteau, M., Gai, W., Liu, W., Metcalfe, J., Power, J., Repond, J., Weerts, H., Xia, L., Zupan, J., Wells, J. D., Zhang, Z., Adolphsen, C., Barklow, T., Dolgashev, V., Franzi, M., Graf, N., Hewett, J., Kemp, M., Kononenko, O., Markiewicz, T., Moffeit, K., Neilson, J., Nosochkov, Y., Oriunno, M., Phinney, N., Rizzo, T., Tantawi, S., Wang, J., Weatherford, B., White, G., and Woodley, M.
Subjects: Physics - Accelerator Physics
Abstract: The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear $e^+e^-$ collider under development at CERN. Following the CLIC conceptual design published in 2012, this report provides an overview of the CLIC project, its current status, and future developments. It presents the CLIC physics potential and reports on design, technology, and implementation aspects of the accelerator and the detector. CLIC is foreseen to be built and operated in stages, at centre-of-mass energies of 380 GeV, 1.5 TeV and 3 TeV, respectively. CLIC uses a two-beam acceleration scheme, in which 12 GHz accelerating structures are powered via a high-current drive beam. For the first stage, an alternative with X-band klystron powering is also considered. CLIC accelerator optimisation, technical developments and system tests have resulted in an increased energy efficiency (power around 170 MW) for the 380 GeV stage, together with a reduced cost estimate at the level of 6 billion CHF. The detector concept has been refined using improved software tools. Significant progress has been made on detector technology developments for the tracking and calorimetry systems. A wide range of CLIC physics studies has been conducted, both through full detector simulations and parametric studies, together providing a broad overview of the CLIC physics potential. Each of the three energy stages adds cornerstones of the full CLIC physics programme, such as Higgs width and couplings, top-quark properties, Higgs self-coupling, direct searches, and many precision electroweak measurements. The interpretation of the combined results gives crucial and accurate insight into new physics, largely complementary to LHC and HL-LHC. The construction of the first CLIC energy stage could start by 2026. First beams would be available by 2035, marking the beginning of a broad CLIC physics programme spanning 25-30 years., Comment: 112 pages, 59 figures; published as CERN Yellow Report Monograph Vol. 2/2018; corresponding editors: Philip N. Burrows, Nuria Catalan Lasheras, Lucie Linssen, Marko Petri\v{c}, Aidan Robson, Daniel Schulte, Eva Sicking, Steinar Stapnes
Published: 2018
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22. Experimental observation of proton bunch modulation in a plasma, at varying plasma densities

Author: Adli, E., Ahuja, A., Apsimon, O., Apsimon, R., Bachmann, A. -M., Barrientos, D., Barros, M. M., Batkiewicz, J., Batsch, F., Bauche, J., Olsen, V. K. Berglyd, Bernardini, M., Biskup, B., Boccardi, A., Bogey, T., Bohl, T., Bracco, C., Braunmüller, F., Burger, S., Burt, G., Bustamante, S., Buttenschön, B., Caldwell, A., Cascella, M., Chappell, J., Chevallay, E., Chung, M., Cooke, D., Damerau, H., Deacon, L., Deubner, L. H., Dexter, A., Doebert, S., Farmer, J., Fedosseev, V. N., Fior, G., Fiorito, R., Fonseca, R. A., Friebel, F., Garolfi, L., Gessner, S., Gorgisyan, I., Gorn, A. A., Granados, E., Grulke, O., Gschwendtner, E., Guerrero, A., Hansen, J., Helm, A., Henderson, J. R., Hessler, C., Hoe, W., Hüther, M., Ibison, M., Jensen, L., Jolly, S., Keeble, F., Kim, S. -Y., Kraus, F., Lefevre, T., LeGodec, G., Li, Y., Liu, S., Lopes, N., Lotov, K. V., Brun, L. Maricalva, Martyanov, M., Mazzoni, S., Godoy, D. Medina, Minakov, V. A., Mitchell, J., Molendijk, J. C., Mompo, R., Moody, J. T., Moreira, M., Muggli, P., Mutin, C., Öz, E., Ozturk, E., Pasquino, C., Pardons, A., Asmus, F. Pena, Pepitone, K., Perera, A., Petrenko, A., Pitman, S., Plyushchev, G., Pukhov, A., Rey, S., Rieger, K., Ruhl, H., Schmidt, J. S., Shalimova, I. A., Shaposhnikova, E., Sherwood, P., Silva, L. O., Soby, L., Sosedkin, A. P., Speroni, R., Spitsyn, R. I., Tuev, P. V., Turner, M., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Vincke, H., Welsch, C. P., Williamson, B., Wing, M., Woolley, B., and Xia, G.
Subjects: Physics - Accelerator Physics, Physics - Plasma Physics
Abstract: We give direct experimental evidence for the observation of the full transverse self-modulation of a relativistic proton bunch propagating through a dense plasma. The bunch exits the plasma with a density modulation resulting from radial wakefield effects with a period reciprocal to the plasma frequency. We show that the modulation is seeded by using an intense laser pulse co-propagating with the proton bunch which creates a relativistic ionization front within the bunch. We show by varying the plasma density over one order of magnitude that the modulation period scales with the expected dependence on the plasma density., Comment: 4 figures, AWAKE collaboration paper, Submitted to PRL
Published: 2018
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23. Acceleration of electrons in the plasma wakefield of a proton bunch

Author: The AWAKE Collaboration, Adli, E., Ahuja, A., Apsimon, O., Apsimon, R., Bachmann, A. -M., Barrientos, D., Batsch, F., Bauche, J., Olsen, V. K. Berglyd, Bernardini, M., Bohl, T., Bracco, C., Braunmueller, F., Burt, G., Buttenschoen, B., Caldwell, A., Cascella, M., Chappell, J., Chevallay, E., Chung, M., Cooke, D., Damerau, H., Deacon, L., Deubner, L. H., Dexter, A., Doebert, S., Farmer, J., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Friebel, F., Garolfi, L., Gessner, S., Gorgisyan, I., Gorn, A. A., Granados, E., Grulke, O., Gschwendtner, E., Hansen, J., Helm, A., Henderson, J. R., Huether, M., Ibison, M., Jensen, L., Jolly, S., Keeble, F., Kim, S. -Y., Kraus, F., Li, Y., Liu, S., Lopes, N., Lotov, K. V., Brun, L. Maricalva, Martyanov, M., Mazzoni, S., Godoy, D. Medina, Minakov, V. A., Mitchell, J., Molendijk, J. C., Moody, J. T., Moreira, M., Muggli, P., Oez, E., Pasquino, C., Pardons, A., Asmus, F. Pena, Pepitone, K., Perera, A., Petrenko, A., Pitman, S., Pukhov, A., Rey, S., Rieger, K., Ruhl, H., Schmidt, J. S., Shalimova, I. A., Sherwood, P., Silva, L. O., Soby, L., Sosedkin, A. P., Speroni, R., Spitsyn, R. I., Tuev, P. V., Turner, M., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Welsch, C. P., Williamson, B., Wing, M., Woolley, B., and Xia, G.
Subjects: Physics - Accelerator Physics, High Energy Physics - Experiment, Physics - Plasma Physics
Abstract: High energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. In order to increase the energy or reduce the size of the accelerator, new acceleration schemes need to be developed. Plasma wakefield acceleration, in which the electrons in a plasma are excited, leading to strong electric fields, is one such promising novel acceleration technique. Pioneering experiments have shown that an intense laser pulse or electron bunch traversing a plasma, drives electric fields of 10s GV/m and above. These values are well beyond those achieved in conventional RF accelerators which are limited to ~0.1 GV/m. A limitation of laser pulses and electron bunches is their low stored energy, which motivates the use of multiple stages to reach very high energies. The use of proton bunches is compelling, as they have the potential to drive wakefields and accelerate electrons to high energy in a single accelerating stage. The long proton bunches currently available can be used, as they undergo self-modulation, a particle-plasma interaction which longitudinally splits the bunch into a series of high density microbunches, which then act resonantly to create large wakefields. The AWAKE experiment at CERN uses intense bunches of protons, each of energy 400 GeV, with a total bunch energy of 19 kJ, to drive a wakefield in a 10 m long plasma. Bunches of electrons are injected into the wakefield formed by the proton microbunches. This paper presents measurements of electrons accelerated up to 2 GeV at AWAKE. This constitutes the first demonstration of proton-driven plasma wakefield acceleration. The potential for this scheme to produce very high energy electron bunches in a single accelerating stage means that the results shown here are a significant step towards the development of future high energy particle accelerators., Comment: 7 pages, 4 figures. Updated acknowledgements and one reference
Published: 2018
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24. AWAKE readiness for the study of the seeded self-modulation of a 400\,GeV proton bunch

Author: Muggli, P., Adli, E., Apsimon, R., Asmus, F., Baartman, R., Bachmann, A. -M., Marin, M. Barros, Batsch, F., Bauche, J., Olsen, V. K. Berglyd, Bernardini, M., Biskup, B., Boccardi, A., Bogey, T., Bohl, T., Bracco, C., Braunmuller, F., Burger, S., Burt, G., Bustamante, S., Buttenschon, B., Butterworth, A., Caldwell, A., Cascella, M., Chevallay, E., Chung, M., Damerau, H., Deacon, L., Dexter, A., Dirksen, P., Doebert, S., Farmer, J., Fedosseev, V., Feniet, T., Fior, G., Fiorito, R., Fonseca, R., Friebel, F., Gander, P., Gessner, S., Gorgisyan, I., Gorn, A. A., Grulke, O., Gschwendtner, E., Guerrero, A., Hansen, J., Hessler, C., Hofle, W., Holloway, J., Huther, M., Ibison, M., Islam, M. R., Jensen, L., Jolly, S., Kasim, M., Keeble, F., Kim, S. -Y., Krause, F., Lasheen, A., Lefevre, T., LeGodec, G., Li, Y., Liu, S., Lopes, N., Lotov, K. V., Martyanov, M., Mazzoni, S., Godoy, D. Medina, Mete, O., Minakov, V. A., Mompo, R., Moody, J., Moreira, M. T., Mitchell, J., Mutin, C., Norreys, P., Oz, E., Ozturk, E., Pauw, W., Pardone, A., Pasquino, C., Pepitone, K., Petrenko, A., Pitmann, S., Plyushchev, G., Pukhov, A., Rieger, K., Ruhl, H., Schmidt, J., Shalimova, I. A., Shaposhnikova, E., Sherwood, P., Silva, L., Sosedkin, A. P., Spitsyn, R. I., Szczurek, K., Thomas, J., Tuev, P. V., Turner, M., Verzilov, V., Vieira, J., Vincke, H., Welsch, C. P., Williamson, B., Wing, M., Xia, G., and Zhang, H.
Subjects: Physics - Plasma Physics, Physics - Accelerator Physics
Abstract: AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here is ready for systematic study of the seeded self-modulation of the 400\,GeV proton bunch in the 10\,m-long rubidium plasma with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. % We show that the short laser pulse used for ionization of the rubidium vapor propagates all the way along the column, suggesting full ionization of the vapor. % We show that ionization occurs along the proton bunch, at the laser time and that the plasma that follows affects the proton bunch. %, Comment: Presented as an invited talk at the EPS=Plasma Physics Conference 2017
Published: 2017
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25. Study of the long-lived excited state in the neutron deficient nuclides $^{195,197,199}$Po by precision mass measurement

Author: Althubiti, N. A., Atanasov, D., Blaum, K., Cocolios, T. E., Goodacre, T. Day, Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., George, S., Herfurth, F., Heyde, K., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Neidherr, D., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Welker, A., Wienholtz, F., Wolf, R. N., and Zuber, K.
Subjects: Nuclear Experiment
Abstract: Direct mass measurements of the low-spin $3/2^{(-)}$ and high-spin $13/2^{(+)}$ states in the neutron-deficient isotopes $^{195}$Po, $^{197}$Po, and high-spin $13/2^{(+)}$ state in $^{199}$Po were performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE-CERN. These measurements allow the determination of the excitation energy of the isomeric state arising from the $\nu$i$_{13/2}$ orbital in $^{195,197}$Po. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from $\alpha$-decay chains. The new excitation energies complete the knowledge of the energy systematics in the region and confirm for the first time that the $13/2^{(+)}$ states remain isomeric, independent of the number of valence neutrons.
Published: 2017
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26. Updated baseline for a staged Compact Linear Collider

Author: CLIC, The, collaborations, CLICdp, Boland, M. J., Felzmann, U., Giansiracusa, P. J., Lucas, T. G., Rassool, R. P., Balazs, C., Charles, T. K., Afanaciev, K., Emeliantchik, I., Ignatenko, A., Makarenko, V., Shumeiko, N., Patapenka, A., Zhuk, I., Hoffman, A. C. Abusleme, Gutierrez, M. A. Diaz, Gonzalez, M. Vogel, Chi, Y., He, X., Pei, G., Pei, S., Shu, G., Wang, X., Zhang, J., Zhao, F., Zhou, Z., Chen, H., Gao, Y., Huang, W., Kuang, Y. P., Li, B., Li, Y., Shao, J., Shi, J., Tang, C., Wu, X., Ma, L., Han, Y., Fang, W., Gu, Q., Huang, D., Huang, X., Tan, J., Wang, Z., Zhao, Z., Laštovička, T., Uggerhoj, U., Wistisen, T. N., Aabloo, A., Eimre, K., Kuppart, K., Vigonski, S., Zadin, V., Aicheler, M., Baibuz, E., Brücken, E., Djurabekova, F., Eerola, P., Garcia, F., Haeggström, E., Huitu, K., Jansson, V., Karimaki, V., Kassamakov, I., Kyritsakis, A., Lehti, S., Meriläinen, A., Montonen, R., Niinikoski, T., Nordlund, K., Österberg, K., Parekh, M., Törnqvist, N. A., Väinölä, J., Veske, M., Farabolini, W., Mollard, A., Napoly, O., Peauger, F., Plouin, J., Bambade, P., Chaikovska, I., Chehab, R., Davier, M., Kaabi, W., Kou, E., LeDiberder, F., Pöschl, R., Zerwas, D., Aimard, B., Balik, G., Baud, J. -P., Blaising, J. -J., Brunetti, L., Chefdeville, M., Drancourt, C., Geoffroy, N., Jacquemier, J., Jeremie, A., Karyotakis, Y., Nappa, J. M., Vilalte, S., Vouters, G., Bernard, A., Peric, I., Gabriel, M., Simon, F., Szalay, M., van der Kolk, N., Alexopoulos, T., Gazis, E. N., Gazis, N., Ikarios, E., Kostopoulos, V., Kourkoulis, S., Gupta, P. D., Shrivastava, P., Arfaei, H., Dayyani, M. K., Ghasem, H., Hajari, S. S., Shaker, H., Ashkenazy, Y., Abramowicz, H., Benhammou, Y., Borysov, O., Kananov, S., Levy, A., Levy, I., Rosenblat, O., D'Auria, G., Di Mitri, S., Abe, T., Aryshev, A., Higo, T., Makida, Y., Matsumoto, S., Shidara, T., Takatomi, T., Takubo, Y., Tauchi, T., Toge, N., Ueno, K., Urakawa, J., Yamamoto, A., Yamanaka, M., Raboanary, R., Hart, R., van der Graaf, H., Eigen, G., Zalieckas, J., Adli, E., Lillestøl, R., Malina, L., Pfingstner, J., Sjobak, K. N., Ahmed, W., Asghar, M. I., Hoorani, H., Bugiel, S., Dasgupta, R., Firlej, M., Fiutowski, T. A., Idzik, M., Kopec, M., Kuczynska, M., Moron, J., Swientek, K. P., Daniluk, W., Krupa, B., Kucharczyk, M., Lesiak, T., Moszczynski, A., Pawlik, B., Sopicki, P., Wojtoń, T., Zawiejski, L., Kalinowski, J., Krawczyk, M., Żarnecki, A. F., Firu, E., Ghenescu, V., Neagu, A. T., Preda, T., Zgura, I-S., Aloev, A., Azaryan, N., Budagov, J., Chizhov, M., Filippova, M., Glagolev, V., Gongadze, A., Grigoryan, S., Gudkov, D., Karjavine, V., Lyablin, M., Olyunin, A., Samochkine, A., Sapronov, A., Shirkov, G., Soldatov, V., Solodko, A., Solodko, E., Trubnikov, G., Tyapkin, I., Uzhinsky, V., Vorozhtov, A., Levichev, E., Mezentsev, N., Piminov, P., Shatilov, D., Vobly, P., Zolotarev, K., Jelisavcic, I. Bozovic, Kacarevic, G., Lukic, S., Milutinovic-Dumbelovic, G., Pandurovic, M., Iriso, U., Perez, F., Pont, M., Trenado, J., Aguilar-Benitez, M., Calero, J., Garcia-Tabares, L., Gavela, D., Gutierrez, J. L., Lopez, D., Toral, F., Moya, D., Jimeno, A. Ruiz, Vila, I., Argyropoulos, T., Gutierrez, C. Blanch, Boronat, M., Esperante, D., Faus-Golfe, A., Fuster, J., Martinez, N. Fuster, Muñoz, N. Galindo, García, I., Navarro, J. Giner, Ros, E., Vos, M., Brenner, R., Ekelöf, T., Jacewicz, M., Ögren, J., Olvegård, M., Ruber, R., Ziemann, V., Aguglia, D., Tehrani, N. Alipour, Andersson, A., Andrianala, F., Antoniou, F., Artoos, K., Atieh, S., Sune, R. Ballabriga, Barnes, M. J., Garcia, J. Barranco, Bartosik, H., Belver-Aguilar, C., Morell, A. Benot, Bett, D. R., Bettoni, S., Blanchot, G., Garcia, O. Blanco, Bonnin, X. A., Brunner, O., Burkhardt, H., Calatroni, S., Campbell, M., Lasheras, N. Catalan, Bastos, M. Cerqueira, Cherif, A., Chevallay, E., Constance, B., Corsini, R., Cure, B., Curt, S., Dalena, B., Dannheim, D., De Michele, G., De Oliveira, L., Deelen, N., Delahaye, J. P., Dobers, T., Doebert, S., Draper, M., Ramos, F. Duarte, Dubrovskiy, A., Elsener, K., Esberg, J., Esposito, M., Fedosseev, V., Ferracin, P., Fiergolski, A., Foraz, K., Fowler, A., Friebel, F., Fuchs, J-F., Rojas, C. A. Fuentes, Gaddi, A., Fajardo, L. Garcia, Morales, H. Garcia, Garion, C., Gatignon, L., Gayde, J-C., Gerwig, H., Goldblatt, A. N., Grefe, C., Grudiev, A., Guillot-Vignot, F. G., Gutt-Mostowy, M. L., Hauschild, M., Hessler, C., Holma, J. K., Holzer, E., Hourican, M., Hynds, D., Levinsen, Y. Inntjore, Jeanneret, B., Jensen, E., Jonker, M., Kastriotou, M., Kemppinen, J. M. K., Kieffer, R. B., Klempt, W., Kononenko, O., Korsback, A., Platia, E. Koukovini, Kovermann, J. W., Kozsar, C-I., Kremastiotis, I., Kulis, S., Latina, A., Leaux, F., Lebrun, P., Lefevre, T., Linssen, L., Cudie, X. Llopart, Maier, A. A., Durand, H. Mainaud, Manosperti, E., Marelli, C., Lacoma, E. Marin, Martin, R., Mazzoni, S., Mcmonagle, G., Mete, O., Mether, L. M., Modena, M., Münker, R. M., Muranaka, T., Del Busto, E. Nebot, Nikiforou, N., Nisbet, D., Nonglaton, J-M., Nuiry, F. X., Nürnberg, A., Olvegard, M., Osborne, J., Papadopoulou, S., Papaphilippou, Y., Passarelli, A., Patecki, M., Pazdera, L., Pellegrini, D., Pepitone, K., Codina, E. Perez, Fontenla, A. Perez, Persson, T. H. B., Petrič, M., Pitters, F., Pittet, S., Plassard, F., Rajamak, R., Redford, S., Renier, Y., Rey, S. F., Riddone, G., Rinolfi, L., Castro, E. Rodriguez, Roloff, P., Rossi, C., Rude, V., Rumolo, G., Sailer, A., Santin, E., Schlatter, D., Schmickler, H., Schulte, D., Shipman, N., Sicking, E., Simoniello, R., Skowronski, P. K., Mompean, P. Sobrino, Soby, L., Sosin, M. P., Sroka, S., Stapnes, S., Sterbini, G., Ström, R., Syratchev, I., Tecker, F., Thonet, P. A., Timeo, L., Timko, H., Garcia, R. Tomas, Valerio, P., Vamvakas, A. L., Vivoli, A., Weber, M. A., Wegner, R., Wendt, M., Woolley, B., Wuensch, W., Uythoven, J., Zha, H., Zisopoulos, P., Benoit, M., Pinto, M. Vicente Barreto, Bopp, M., Braun, H. H., Divall, M. Csatari, Dehler, M., Garvey, T., Raguin, J. Y., Rivkin, L., Zennaro, R., Aksoy, A., Nergiz, Z., Pilicer, E., Tapan, I., Yavas, O., Baturin, V., Kholodov, R., Lebedynskyi, S., Miroshnichenko, V., Mordyk, S., Profatilova, I., Storizhko, V., Watson, N., Winter, A., Goldstein, J., Green, S., Marshall, J. S., Thomson, M. A., Xu, B., Gillespie, W. A., Pan, R., Tyrk, M. A, Protopopescu, D., Robson, A., Apsimon, R., Bailey, I., Burt, G., Constable, D., Dexter, A., Karimian, S., Lingwood, C., Buckland, M. D., Casse, G., Vossebeld, J., Bosco, A., Karataev, P., Kruchinin, K., Lekomtsev, K., Nevay, L., Snuverink, J., Yamakawa, E., Boisvert, V., Boogert, S., Boorman, G., Gibson, S., Lyapin, A., Shields, W., Teixeira-Dias, P., West, S., Jones, R., Joshi, N., Bodenstein, R., Burrows, P. N., Christian, G. B., Gamba, D., Perry, C., Roberts, J., Clarke, J. A., Collomb, N. A., Jamison, S. P., Shepherd, B. J. A., Walsh, D., Demarteau, M., Repond, J., Weerts, H., Xia, L., Wells, J. D., Adolphsen, C., Barklow, T., Breidenbach, M., Graf, N., Hewett, J., Markiewicz, T., McCormick, D., Moffeit, K., Nosochkov, Y., Oriunno, M., Phinney, N., Rizzo, T., Tantawi, S., Wang, F., Wang, J., White, G., and Woodley, M.
Subjects: Physics - Accelerator Physics, High Energy Physics - Experiment
Abstract: The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to be built and operated in a staged approach with three centre-of-mass energy stages ranging from a few hundred GeV up to 3 TeV. The first stage will focus on precision Standard Model physics, in particular Higgs and top-quark measurements. Subsequent stages will focus on measurements of rare Higgs processes, as well as searches for new physics processes and precision measurements of new states, e.g. states previously discovered at LHC or at CLIC itself. In the 2012 CLIC Conceptual Design Report, a fully optimised 3 TeV collider was presented, while the proposed lower energy stages were not studied to the same level of detail. This report presents an updated baseline staging scenario for CLIC. The scenario is the result of a comprehensive study addressing the performance, cost and power of the CLIC accelerator complex as a function of centre-of-mass energy and it targets optimal physics output based on the current physics landscape. The optimised staging scenario foresees three main centre-of-mass energy stages at 380 GeV, 1.5 TeV and 3 TeV for a full CLIC programme spanning 22 years. For the first stage, an alternative to the CLIC drive beam scheme is presented in which the main linac power is produced using X-band klystrons., Comment: 57 pages, 27 figures, 12 tables, published as CERN Yellow Report. Updated version: Minor layout changes for print version
Published: 2016
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27. The structure of low-lying states in ${}^{140}$Sm studied by Coulomb excitation

Author: Klintefjord, M., Hadyńska-Klȩk, K., Görgen, A., Bauer, C., Garrote, F. L. Bello, Bönig, S., Bounthong, B., Damyanova, A., Delaroche, J. -P., Fedosseev, V., Fink, D. A., Giacoppo, F., Girod, M., Hoff, P., Imai, N., Korten, W., Larsen, A. C., Libert, J., Lutter, R., Marsh, B. A., Molkanov, P. L., Naïdja, H., Napiorkowski, P., Nowacki, F., Pakarinen, J., Rapisarda, E., Reiter, P., Renstrøm, T., Rothe, S., Seliverstov, M. D., Siebeck, B., Siem, S., Srebrny, J., Stora, T., Thöle, P., Tornyi, T. G., Tveten, G. M., Van Duppen, P., Vermeulen, M. J, Voulot, D., Warr, N., Wenander, F., De Witte, H., and Zielińska, M.
Subjects: Nuclear Experiment
Abstract: The electromagnetic structure of $^{140}$Sm was studied in a low-energy Coulomb excitation experiment with a radioactive ion beam from the REX-ISOLDE facility at CERN. The $2^+$ and $4^+$ states of the ground-state band and a second $2^+$ state were populated by multi-step excitation. The analysis of the differential Coulomb excitation cross sections yielded reduced transition probabilities between all observed states and the spectroscopic quadrupole moment for the $2_1^+$ state. The experimental results are compared to large-scale shell model calculations and beyond-mean-field calculations based on the Gogny D1S interaction with a five-dimensional collective Hamiltonian formalism. Simpler geometric and algebraic models are also employed to interpret the experimental data. The results indicate that $^{140}$Sm shows considerable $\gamma$ softness, but in contrast to earlier speculation no signs of shape coexistence at low excitation energy. This work sheds more light on the onset of deformation and collectivity in this mass region., Comment: 15 pages, 12 figures
Published: 2016
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28. Identification of autoionizing states of atomic chromium for resonance photo-ionization at the ISOLDE-RILIS

Author: Goodacre, T Day, Chrysalidis, K, Fedorovc, D, Fedosseev, V N, Marsh, B A, Molkanov, P, Rossel, R E, Rothe, S, and Seiffert, C
Subjects: Physics - Atomic Physics
Abstract: The resonance ionization laser ion source (RILIS) is the principal ion source of the ISOLDE radioactive beam facility based at CERN. Using the method of in-source resonance ionization spectroscopy, an optimal three-step, three-resonance photo-ionization scheme has been developed for chromium. The scheme uses an ionizing transition to one of the 14 newly observed autoionizing states. This work increases the range of ISOLDE-RILIS ionized beams to 32 chemical elements. Details of the spectroscopic studies are described and the new ionization scheme is summarized. A link to the complete version of this document will be added here following publication
Published: 2015

29. AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN

Author: Gschwendtner, E., Adli, E., Amorim, L., Apsimon, R., Assmann, R., Bachmann, A. -M., Batsch, F., Bauche, J., Olsen, V. K. Berglyd, Bernardini, M., Bingham, R., Biskup, B., Bohl, T., Bracco, C., Burrows, P. N., Burt, G., Buttenschon, B., Butterworth, A., Caldwell, A., Cascella, M., Chevallay, E., Cipiccia, S., Damerau, H., Deacon, L., Dirksen, P., Doebert, S., Dorda, U., Farmer, J., Fedosseev, V., Feldbaumer, E., Fiorito, R., Fonseca, R., Friebel, F., Gorn, A. A., Grulke, O., Hansen, J., Hessler, C., Hofle, W., Holloway, J., Huther, M., Jaroszynski, D., Jensen, L., Jolly, S., Joulaei, A., Kasim, M., Keeble, F., Li, Y., Liu, S., Lopes, N., Lotov, K. V., Mandry, S., Martorelli, R., Martyanov, M., Mazzoni, S., Mete, O., Minakov, V. A., Mitchell, J., Moody, J., Muggli, P., Najmudin, Z., Norreys, P., Oz, E., Pardons, A., Pepitone, K., Petrenko, A., Plyushchev, G., Pukhov, A., Rieger, K., Ruhl, H., Salveter, F., Savard, N., Schmidt, J., Seryi, A., Shaposhnikova, E., Sheng, Z. M., Sherwood, P., Silva, L., Soby, L., Sosedkin, A. P., Spitsyn, R. I., Trines, R., Tuev, P. V., Turner, M., Verzilov, V., Vieira, J., Vincke, H., Wei, Y., Welsch, C. P., Wing, M., Xia, G., and Zhang, H.
Subjects: Physics - Accelerator Physics, Physics - Plasma Physics
Abstract: The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment at CERN and the world's first proton driven plasma wakefield acceleration experiment. The AWAKE experiment will be installed in the former CNGS facility and uses the 400 GeV/c proton beam bunches from the SPS. The first experiments will focus on the self-modulation instability of the long (rms ~12 cm) proton bunch in the plasma. These experiments are planned for the end of 2016. Later, in 2017/2018, low energy (~15 MeV) electrons will be externally injected to sample the wakefields and be accelerated beyond 1 GeV. The main goals of the experiment will be summarized. A summary of the AWAKE design and construction status will be presented., Comment: 7 pages, 7 figures, 2 tables
Published: 2015
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30. Path to AWAKE: Evolution of the concept

Author: Caldwell, A., Adli, E., Amorim, L., Apsimon, R., Argyropoulos, T., Assmann, R., Bachmann, A. -M., Batsch, F., Bauche, J., Olsen, V. K. Berglyd, Bernardini, M., Bingham, R., Biskup, B., Bohl, T., Bracco, C., Burrows, P. N., Burt, G., Buttenschon, B., Butterworth, A., Cascella, M., Chattopadhyay, S., Chevallay, E., Cipiccia, S., Damerau, H., Deacon, L., Dirksen, P., Doebert, S., Dorda, U., Elsen, E., Farmer, J., Fartoukh, S., Fedosseev, V., Feldbaumer, E., Fiorito, R., Fonseca, R., Friebel, F., Geschonke, G., Goddard, B., Gorn, A. A., Grulke, O., Gschwendtner, E., Hansen, J., Hessler, C., Hillenbrand, S., Hofle, W., Holloway, J., Huang, C., Huther, M., Jaroszynski, D., Jensen, L., Jolly, S., Joulaei, A., Kasim, M., Keeble, F., Kersevan, R., Kumar, N., Li, Y., Liu, S., Lopes, N., Lotov, K. V., Lu, W., Machacek, J., Mandry, S., Martin, I., Martorelli, R., Martyanov, M., Mazzoni, S., Meddahi, M., Merminga, L., Mete, O., Minakov, V. A., Mitchell, J., Moody, J., Muller, A. -S., Najmudin, Z., Noakes, T. C. Q., Norreys, P., Osterhoff, J., Oz, E., Pardons, A., Pepitone, K., Petrenko, A., Plyushchev, G., Pozimski, J., Pukhov, A., Reimann, O., Rieger, K., Roesler, S., Ruhl, H., Rusnak, T., Salveter, F., Savard, N., Schmidt, J., von der Schmitt, H., Seryi, A., Shaposhnikova, E., Sheng, Z. M., Sherwood, P., Silva, L., Simon, F., Soby, L., Sosedkin, A. P., Spitsyn, R. I., Tajima, T., Tarkeshian, R., Timko, H., Trines, R., Tueckmantel, T., Tuev, P. V., Turner, M., Velotti, F., Verzilov, V., Vieira, J., Vincke, H., Wei, Y., Welsch, C. P., Wing, M., Xia, G., Yakimenko, V., Zhang, H., and Zimmermann, F.
Subjects: Physics - Plasma Physics, Physics - Accelerator Physics
Abstract: This report describes the conceptual steps in reaching the design of the AWAKE experiment currently under construction at CERN. We start with an introduction to plasma wakefield acceleration and the motivation for using proton drivers. We then describe the self-modulation instability --- a key to an early realization of the concept. This is then followed by the historical development of the experimental design, where the critical issues that arose and their solutions are described. We conclude with the design of the experiment as it is being realized at CERN and some words on the future outlook. A summary of the AWAKE design and construction status as presented in this conference is given in [1]., Comment: 15 pages, 24 figures, 1 table, 111 references, 121 author from 36 organizations
Published: 2015
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31. Shapes of the $^{192,190}$Pb ground states from beta decay studies using the total absorption technique

Author: Aguado, M. E. Estevez, Algora, A., Agramunt, J., Rubio, B., Tain, J. L., Jordan, D., Fraile, L. M., Gelletly, W., Frank, A., Csatlos, M., Dombradi, Zs., Krasznahorkay, A., Nacher, E., Sarriguren, P., Borge, M. J. G., Briz, J. A., Tengblad, O., Molina, F., Moreno, O., Kowalska, M., Fedosseev, V. N., Mash, B. A., Fedorov, D. V., Molkanov, P. L., Andreyev, A. N., Seliverstov, M. D., Burkard, K., and Huller, W.
Subjects: Nuclear Experiment
Abstract: The beta decay of $^{192,190}$Pb has been studied using the total absorption technique at the ISOLDE(CERN) facility. The beta-decay strength deduced from the measurements, combined with QRPA theoretical calculations, allow us to infer that the ground states of the $^{192,190}$Pb isotopes are spherical. These results represent the first application of the shape determination method using the total absorption technique for heavy nuclei and in a region where there is considerable interest in nuclear shapes and shape effects.
Published: 2015
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32. Low-energy Coulomb excitation of $^{62}$Fe and $^{62}$Mn following in-beam decay of $^{62}$Mn

Author: Gaffney, L. P., Van de Walle, J., Bastin, B., Bildstein, V., Blazhev, A., Bree, N., Cederkäll, J., Darby, I., De Witte, H., DiJulio, D., Diriken, J., Fedosseev, V. N., Fransen, Ch., Gernhäuser, R., Gustafsson, A., Hess, H., Huyse, M., Kesteloot, N., Kröll, Th., Lutter, R., Marsh, B. A., Reiter, P., Seidlitz, M., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., Wimmer, K., and Wrzosek-Lipska, K.
Subjects: Nuclear Experiment
Abstract: Sub-barrier Coulomb-excitation was performed on a mixed beam of $^{62}$Mn and $^{62}$Fe, following in-trap $\beta^{-}$ decay of $^{62}$Mn at REX-ISOLDE, CERN. The trapping and charge breeding times were varied in order to alter the composition of the beam, which was measured by means of an ionisation chamber at the zero-angle position of the Miniball array. A new transition was observed at 418~keV, which has been tentatively associated to a $(2^{+},3^{+})\rightarrow1^{+}_{g.s.}$ transition. This fixes the relative positions of the $\beta$-decaying $4^{+}$ and $1^{+}$ states in $^{62}$Mn for the first time. Population of the $2^{+}_{1}$ state was observed in $^{62}$Fe and the cross-section determined by normalisation to the $^{109}$Ag target excitation, confirming the $B(E2)$ value measured in recoil-distance lifetime experiments., Comment: 9 pages, 10 figures
Published: 2015
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33. Synthesis, surface chemical analysis, lifetime studies and degradation mechanisms of Cs-K-Sb photocathodes

Author: Panuganti, H., Chevallay, E., Fedosseev, V., and Himmerlich, M.
Published: 2021
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34. Correction to ‘Proton-driven plasma wakefield acceleration in AWAKE’

Author: The AWAKE Collaboration, Gschwendtner, E., Turner, M., Adli, E., Ahuja, A., Apsimon, O., Apsimon, R., Bachmann, A.-M., Batsch, F., Bracco, C., Braunmüller, F., Burger, S., Burt, G., Buttenschön, B., Caldwell, A., Chappell, J., Chevallay, E., Chung, M., Cooke, D., Damerau, H., Deubner, L. H., Dexter, A., Doebert, S., Farmer, J., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Friebel, F., Garolfi, L., Gessner, S., Goddard, B., Gorgisyan, I., Gorn, A. A., Granados, E., Grulke, O., Hartin, A., Helm, A., Henderson, J. R., Hüther, M., Ibison, M., Jolly, S., Keeble, F., Kelisani, M. D., Kim, S.-Y., Kraus, F., Krupa, M., Lefevre, T., Li, Y., Liu, S., Lopes, N., Lotov, K. V., Martyanov, M., Mazzoni, S., Minakov, V. A., Molendijk, J. C., Moody, J. T., Moreira, M., Muggli, P., Panuganti, H., Pardons, A., Asmus, F. Peña, Perera, A., Petrenko, A., Pukhov, A., Rey, S., Sherwood, P., Silva, L. O., Sosedkin, A. P., Tuev, P. V., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Welsch, C. P., Wendt, M., Williamson, B., Wing, M., Woolley, B., and Xia, G.
Published: 2020

35. Laser spectroscopy of francium isotopes at the borders of the region of reflection asymmetry

Author: Budinčević, I., Billowes, J., Bissell, M. L., Cocolios, T. E., de Groote, R. P., De Schepper, S., Fedosseev, V. N., Flanagan, K. T., Franchoo, S., Ruiz, R. F. Garcia, Heylen, H., Lynch, K. M., Marsh, B. A., Neyens, G., Procter, T. J., Rossel, R. E., Rothe, S., Strashnov, I., Stroke, H. H., and Wendt, K. D. A.
Subjects: Nuclear Experiment
Abstract: The magnetic dipole moments and changes in mean-square charge radii of the neutron-rich $^{218m,219,229,231}\text{Fr}$ isotopes were measured with the newly-installed Collinear Resonance Ionization Spectroscopy (CRIS) beam line at ISOLDE, CERN, probing the $7s~^{2}S_{1/2}$ to $8p~^{2}P_{3/2}$ atomic transition. The $\delta\langle r^{2}\rangle^{A,221}$ values for $^{218m,219}\text{Fr}$ and $^{229,231}\text{Fr}$ follow the observed increasing slope of the charge radii beyond $N~=~126$. The charge radii odd-even staggering in this neutron-rich region is discussed, showing that $^{220}\text{Fr}$ has a weakly inverted odd-even staggering while $^{228}\text{Fr}$ has normal staggering. This suggests that both isotopes reside at the borders of a region of inverted staggering, which has been associated with reflection-asymmetric shapes. The $g(^{219}\text{Fr}) = +0.69(1)$ value supports a $\pi 1h_{9/2}$ shell model configuration for the ground state. The $g(^{229,231}\text{Fr})$ values support the tentative $I^{\pi}(^{229,231}\text{Fr}) = (1/2^{+})$ spin, and point to a $\pi s_{1/2}^{-1}$ intruder ground state configuration., Comment: Accepted for publication with Physical Review C
Published: 2014
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36. Proton-driven plasma wakefield acceleration in AWAKE

Author: The AWAKE Collaboration, Gschwendtner, E., Turner, M., Adli, E., Ahuja, A., Apsimon, O., Apsimon, R., Bachmann, A.-M., Batsch, F., Bracco, C., Braunmüller, F., Burger, S., Burt, G., Buttenschön, B., Caldwell, A., Chappell, J., Chevallay, E., Chung, M., Cooke, D., Damerau, H., Deubner, L. H., Dexter, A., Doebert, S., Farmer, J., Fedosseev, V. N., Fiorito, R., Fonseca, R. A., Friebel, F., Garolfi, L., Gessner, S., Goddard, B., Gorgisyan, I., Gorn, A. A., Granados, E., Grulke, O., Hartin, A., Helm, A., Henderson, J. R., Hüther, M., Ibison, M., Jolly, S., Keeble, F., Kelisani, M. D., Kim, S.-Y., Kraus, F., Krupa, M., Lefevre, T., Li, Y., Liu, S., Lopes, N., Lotov, K. V., Martyanov, M., Mazzoni, S., Minakov, V.A., Molendijk, J. C., Moody, J. T., Moreira, M., Muggli, P., Panuganti, H., Pardons, A., Asmus, F. Peña, Perera, A., Petrenko, A., Pukhov, A., Rey, S., Sherwood, P., Silva, L. O., Sosedkin, A. P., Tuev, P. V., Velotti, F., Verra, L., Verzilov, V. A., Vieira, J., Welsch, C. P., Wendt, M., Williamson, B., Wing, M., Woolley, B., and Xia, G.
Published: 2019

37. Atom beam emersion from hot cavity laser ion sources

Author: Heinke, R., Fedosseev, V., Kieck, T., Kron, T., Marsh, B., Raeder, S., Richter, S., Rothe, S., and Wendt, K.
Published: 2020
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38. Decay-assisted collinear resonance ionization spectroscopy: Application to neutron-deficient francium

Author: Lynch, K. M., Billowes, J., Bissell, M. L., Budinčević, I., Cocolios, T. E., De Groote, R. P., De Schepper, S., Fedosseev, V. N., Flanagan, K. T., Franchoo, S., Ruiz, R. F. Garcia, Heylen, H., Marsh, B. A., Neyens, G., Procter, T. J., Rossel, R. E., Rothe, S., Strashnov, I., Stroke, H. H., and Wendt, K. D. A.
Subjects: Nuclear Experiment
Abstract: This paper reports on the hyperfine-structure and radioactive-decay studies of the neutron-deficient francium isotopes $^{202-206}$Fr performed with the Collinear Resonance Ionization Spectroscopy (CRIS) experiment at the ISOLDE facility, CERN. The high resolution innate to collinear laser spectroscopy is combined with the high efficiency of ion detection to provide a highly-sensitive technique to probe the hyperfine structure of exotic isotopes. The technique of decay-assisted laser spectroscopy is presented, whereby the isomeric ion beam is deflected to a decay spectroscopy station for alpha-decay tagging of the hyperfine components. Here, we present the first hyperfine-structure measurements of the neutron-deficient francium isotopes $^{202-206}$Fr, in addition to the identification of the low-lying states of $^{202,204}$Fr performed at the CRIS experiment., Comment: Accepted for publication with Physical Review X
Published: 2014
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39. Coulomb excitation of 73Ga

Author: Diriken, J., Stefanescu, I., Balabanski, D., Blasi, N., Blazhev, A., Bree, N., Cederkäll, J., Cocolios, T. E., Davinson, T., Eberth, J., Ekström, A., Fedorov, D. V., Fedosseev, V. N., Fraile, L. M., Franchoo, S., Georgiev, G., Gladnishki, K., Huyse, M., Ivanov, O. V., Ivanov, V. S., Iwanicki, J., Jolie, J., Konstantinopoulos, T., Kröll, Th., Krücken, R., Köster, U., Lagoyannis, A., Bianco, G. Lo, Maierbeck, P., Marsh, B. A., Napiorkowski, P., Patronis, N., Pauwels, D., Reiter, P., Seliverstov, M., Sletten, G., Van de Walle, J., Van Duppen, P., Voulot, D., Walters, W. B., Warr, N., Wenander, F., and Wrzosek, K.
Subjects: Nuclear Experiment
Abstract: The B(E2; Ii -> If) values for transitions in 71Ga and 73Ga were deduced from a Coulomb excitation experiment at the safe energy of 2.95 MeV/nucleon using post-accelerated beams of 71,73Ga at the REX-ISOLDE on-line isotope mass separator facility. The emitted gamma rays were detected by the MINIBALL-detector array and B(E2; Ii->If) values were obtained from the yields normalized to the known strength of the 2+ -> 0+ transition in the 120Sn target. The comparison of these new results with the data of less neutron-rich gallium isotopes shows a shift of the E2 collectivity towards lower excitation energy when adding neutrons beyond N = 40. This supports conclusions from previous studies of the gallium isotopes which indicated a structural change in this isotopical chain between N = 40 and N = 42. Combined with recent measurements from collinear laser spectroscopy showing a 1/2- spin and parity for the ground state, the extracted results revealed evidence for a 1/2-; 3/2- doublet near the ground state in 73 31Ga42 differing by at most 0.8 keV in energy.
Published: 2010
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40. Mean transverse energy, surface chemical and physical characterization of CERN-made Cs-Te photocathodes

Author: Jones, L. B., primary, Panuganti, H., additional, Benjamin, C., additional, Chevallay, E., additional, Churn, H. M., additional, Fedosseev, V., additional, Noakes, T. C. Q., additional, Soomary, L. A. J., additional, and Welsch, C. P., additional
Published: 2024
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41. Generation of 10-m-lengthscale plasma columns by resonant and off-resonant laser pulses

Author: Demeter, G., primary, Moody, J.T., additional, Kedves, M.Á., additional, Batsch, F., additional, Bergamaschi, M., additional, Fedosseev, V., additional, Granados, E., additional, Muggli, P., additional, Panuganti, H., additional, and Zevi Della Porta, G., additional
Published: 2024
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42. Stable 500 kW average power of infrared light in a finesse 35 000 enhancement cavity.

Author: Lu, X.-Y., Chiche, R., Dupraz, K., Johora, F., Martens, A., Nutarelli, D., Peinaud, Y., Soskov, V., Stocchi, A., Zomer, F., Michel, C., Pinard, L., Cormier, E., Lhermite, J., Liu, X., Tian, Q.-L., Yan, L.-X., Huang, W.-H., Tang, C.-X., and Fedosseev, V.
Subjects: YTTERBIUM, LASERS, INFRARED absorption, POSSIBILITY
Abstract: Advances in laser technology over the past 25 years have been impressive, in particular, for the Ytterbium technology where, nowadays, kilowatt-class laser systems are available. This technology also led to the possibility to provide hundreds of kilowatts of laser power by the use of enhancement cavities. We report here on the demonstration of a stable 500 kW average laser power in a high-finesse enhancement cavity. It paves the way toward systems providing laser power in excess of 1 MW and opens the door to a breakthrough in a variety of future applications. [ABSTRACT FROM AUTHOR]
Published: 2024
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43. Coulomb excitation of $^{68}$Ni at safe energies

Author: Bree, N., Stefanescu, I., Butler, P. A., Cederkäll, J., Davinson, T., Delahaye, P., Eberth, J., Fedorov, D., Fedosseev, V. N., Fraile, L. M., Franchoo, S., Georgiev, G., Gladnishki, K., Huyse, M., Ivanov, O., Iwanicki, J., Jolie, J., Köster, U., Kröll, Th., Krücken, R., Marsh, B. A., Niedermaier, O., Reiter, P., Scheit, H., Schwalm, D., Sieber, T., Van de Walle, J., Van Duppen, P., Warr, N., Weisshaar, D., Wenander, F., and Zemlyanoy, S.
Subjects: Nuclear Experiment
Abstract: The $B(E2;0^+\to2^+)$ value in $^{68}$Ni has been measured using Coulomb excitation at safe energies. The $^{68}$Ni radioactive beam was post-accelerated at the ISOLDE facility (CERN) to 2.9 MeV/u. The emitted $\gamma$ rays were detected by the MINIBALL detector array. A kinematic particle reconstruction was performed in order to increase the measured c.m. angular range of the excitation cross section. The obtained value of 2.8$^{+1.2}_{-1.0}$ 10$^2$ e$^2$fm$^4$ is in good agreement with the value measured at intermediate energy Coulomb excitation, confirming the low $0^+\to2^+$ transition probability., Comment: 4 pages, 5 figures
Published: 2008
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44. The electron accelerators for the AWAKE experiment at CERN—Baseline and Future Developments

Author: Pepitone, K., Doebert, S., Apsimon, R., Bauche, J., Bernardini, M., Bracco, C., Burt, G., Chauchet, A., Chevallay, E., Chritin, N., Curt, S., Damerau, H., Kelisani, M. Dayyani, Delory, C., Fedosseev, V., Friebel, F., Galleazzi, F., Gorgisyan, I., Gschwendtner, E., Hansen, J., Jensen, L., Keeble, F., Maricalva, L., Mazzoni, S., McMonagle, G., Mete, O., Pardons, A., Pasquino, C., Verzilov, V., Schmidt, J.S., Soby, L., Williamson, B., Yamakawa, E., Pitman, S., and Mitchell, J.
Published: 2018
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45. Deformation versus Sphericity in the Ground States of the Lightest Gold Isotopes

Author: Cubiss, J. G., primary, Andreyev, A. N., additional, Barzakh, A. E., additional, Van Duppen, P., additional, Hilaire, S., additional, Péru, S., additional, Goriely, S., additional, Al Monthery, M., additional, Althubiti, N. A., additional, Andel, B., additional, Antalic, S., additional, Atanasov, D., additional, Blaum, K., additional, Cocolios, T. E., additional, Day Goodacre, T., additional, de Roubin, A., additional, Farooq-Smith, G. J., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Fink, D. A., additional, Gaffney, L. P., additional, Ghys, L., additional, Harding, R. D., additional, Huyse, M., additional, Imai, N., additional, Joss, D. T., additional, Kreim, S., additional, Lunney, D., additional, Lynch, K. M., additional, Manea, V., additional, Marsh, B. A., additional, Martinez Palenzuela, Y., additional, Molkanov, P. L., additional, Neidherr, D., additional, O’Neill, G. G., additional, Page, R. D., additional, Prosnyak, S. D., additional, Rosenbusch, M., additional, Rossel, R. E., additional, Rothe, S., additional, Schweikhard, L., additional, Seliverstov, M. D., additional, Sels, S., additional, Skripnikov, L. V., additional, Stott, A., additional, Van Beveren, C., additional, Verstraelen, E., additional, Welker, A., additional, Wienholtz, F., additional, Wolf, R. N., additional, and Zuber, K., additional
Published: 2023
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46. Author Correction: Characterization of the shape-staggering effect in mercury nuclei

Author: Marsh, B. A., Goodacre, T. Day, Sels, S., Tsunoda, Y., Andel, B., Andreyev, A. N., Althubiti, N. A., Atanasov, D., Barzakh, A. E., Billowes, J., Blaum, K., Cocolios, T. E., Cubiss, J. G., Dobaczewski, J., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Flanagan, K. T., Gaffney, L. P., Ghys, L., Huyse, M., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Palenzuela, Y. Martinez, Molkanov, P. L., Otsuka, T., Pastore, A., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Spagnoletti, P., Van Beveren, C., Van Duppen, P., Veinhard, M., Verstraelen, E., Welker, A., Wendt, K., Wienholtz, F., Wolf, R. N., Zadvornaya, A., and Zuber, K.
Published: 2022
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47. The SPES Laser Ion Source: Time Structure and Laser Enhancement Measurements with Sm + beam.

Author: Khwairakpam, O S, Mancheva, R, Au, M, Bernerd, C, Centofante, L, Chrysalidis, K, Crepieux, B, Fedosseev, V N, Heinke, R, Marchi, T, Mariotti, E, Marsh, B A, Monetti, A, Nicolosi, P, Rothe, S, Scarpa, D, Schuett, M, Stora, T, Andrighetto, A, and Manzolaro, M
Published: 2024
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48. Characterization of the shape-staggering effect in mercury nuclei

Author: Marsh, B. A., Day Goodacre, T., Sels, S., Tsunoda, Y., Andel, B., Andreyev, A. N., Althubiti, N. A., Atanasov, D., Barzakh, A. E., Billowes, J., Blaum, K., Cocolios, T. E., Cubiss, J. G., Dobaczewski, J., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Flanagan, K. T., Gaffney, L. P., Ghys, L., Huyse, M., Kreim, S., Lunney, D., Lynch, K. M., Manea, V., Martinez Palenzuela, Y., Molkanov, P. L., Otsuka, T., Pastore, A., Rosenbusch, M., Rossel, R. E., Rothe, S., Schweikhard, L., Seliverstov, M. D., Spagnoletti, P., Van Beveren, C., Van Duppen, P., Veinhard, M., Verstraelen, E., Welker, A., Wendt, K., Wienholtz, F., Wolf, R. N., Zadvornaya, A., and Zuber, K.
Published: 2018
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49. The electron accelerator for the AWAKE experiment at CERN

Author: Pepitone, K., Doebert, S., Burt, G., Chevallay, E., Chritin, N., Delory, C., Fedosseev, V., Hessler, Ch., McMonagle, G., Mete, O., Verzilov, V., and Apsimon, R.
Published: 2016
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50. Developments towards the delivery of selenium ion beams at ISOLDE

Author: Chrysalidis, K., Ballof, J., Düllmann, Ch. E., Fedosseev, V. N., Granados, C., Marsh, B. A., Martinez Palenzuela, Y., Ramos, J. P., Rothe, S., Stora, T., and Wendt, K.
Published: 2019
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