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3 results on '"Matthieu Michel"'

1. Study and test of the rebuncher for SARAF-LINAC phase II

Author

L. Weissman, Francis Gohier, Jean-François Leyge, Jonathan Dumas, Didier Uriot, Lu Zhao, R. Duperrier, Matthieu Michel, Didier Chirpaz, C. Marchand, Xiaowen Zhu, Olivier Piquet, Patrice Guiho, Remy Braud, Tom Joannem, E. Farber, Nicolas Solenne, Boaz Kaizer, Francoise Gougnaud, Sébastien Ladegaillerie, Guillaume Ferrand, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics, Nuclear and High Energy Physics, Fabrication, 010308 nuclear & particles physics, Linac, Nuclear engineering, MEBT, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], RF power amplifier, Phase (waves), Power margin, Beam dynamic, 7. Clean energy, 01 natural sciences, Linear particle accelerator, Dynamic simulation, Buncher, 0103 physical sciences, Vacuum level, 010306 general physics, Instrumentation, RF power, Beam (structure)
Abstract

International audience; In order to match the beam exiting the RFQ to the superconducting cavities and to minimize the longitudinal beam extension, three rebunchers will be installed in the Medium Energy Beam Transport (MEBT) of SARAF-LINAC phase II. CEA is in charge of the design and fabrication of the copper-plated stainless steel, 3-gap rebunchers. Beam dynamic simulation leads to the global MEBT design. The rebuncher was successfully conditioned to the RF power of 4.4 kW required for CW operation, with sufficient power margin. A solid state power amplifier of 10 kW developed by SNRC is used during the RF test. The rebuncher shows a good performance in terms of the dissipated power, peak temperatures and vacuum level.

Published
2021
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2. 'Thermal Spike' model applied to thin targets irradiated with swift heavy ion beams at few MeV/u

Author

Christelle Stodel, Marcel Toulemonde, Christoph Fransen, Bertrand Jacquot, Emmanuel Clément, Georges Frémont, Matthieu Michel, Christian Dufour, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Institut für Kernphysik der Universität zu Köln, Universität zu Köln, F. Pellemoine, W. Mittig, C. Stodel, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Universität zu Köln = University of Cologne

Subjects
Accelerator Physics (physics.acc-ph), Physics - Instrumentation and Detectors, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], QC1-999, Coulomb barrier, FOS: Physical sciences, 02 engineering and technology, Radiation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Nuclear physics, Swift heavy ion, 0103 physical sciences, Thermal, Irradiation, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Coupling, Physics, Instrumentation and Detectors (physics.ins-det), 021001 nanoscience & nanotechnology, Physics - Accelerator Physics, Spike (software development), Deformation (engineering), 0210 nano-technology
Abstract

International audience; High electronic excitations in radiation of metallic targets with swift heavy ion beams at the coulomb barrier play a dominant role in the damaging processes of some metals. The inelastic thermal spike model was developed to describe tracks in materials and is applied in this paper to some systems beams/targets employed recently in some nuclear physics experiments. Taking into account the experimental conditions and the approved electron-phonon coupling factors, the results of the calculation enable to interpret the observation of the fast deformation of some targets.

Published
2020
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3. Study and development of CW room temperature rebuncher for SARAF accelerator

Author

A. Perry, Boaz Kaizer, Jean-François Leyge, Jacob Rodnizki, Matthieu Michel, P.Toussaint, Z. Horvitz, M. Di Giacomo, Alex Friedman, L. Danon, O. Mazor, E. Farber, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Physics, Nuclear and High Energy Physics, Shunt impedance, Proton, Nuclear engineering, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Phase (waves), 020206 networking & telecommunications, 02 engineering and technology, 7. Clean energy, 01 natural sciences, Rebuncher, Linear particle accelerator, Charged particle, Nuclear magnetic resonance, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Cavity design, Instrumentation, Electrical impedance, Beam (structure), Microwave
Abstract

International audience; The SARAF 176 MHz accelerator is designed to provide CW proton/deuteron beams up to 5 mA current and 40 MeV accelerated ion energy. Phase I of SARAF (up to 4–5 MeV) has been installed, commissioned, and is available for experimental work. Phase II of SARAF is currently in the design and first prototyping stage and will contain longer MEBT with three rebunchers and four cryomodules, each consisting of SC HWRs and solenoids. Phase II MEBT line is designed to follow a 1.3 MeV/u RFQ, is 4.5 m long, and contains three 176 MHz rebunchers providing a field integral of 105 kV. Different rebuncher configurations have been studied in order to minimize the RF losses and maximize the shunt impedance. Different apertures have also been tested with the 40 mm diameter required by beam dynamics. The simulations were done using CST Microwave Studio. CEA leads the design for SARAF phase II linac including the MEBT rebunchers and has studied a mixed solid copper and Cu plated stainless steel, 3-gap cavity. SNRC is developing a 4-gap OFHC copper rebuncher as a risk reduction. Both designs are presented and discussed in the paper.

Published
2017
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