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5 results on '"Olivier Piquet"'

1. Two Design Options for Compact Linear Accelerators for High Flux Neutron Source

Author

Xiaowen Zhu, Claude Marchand, Olivier Piquet, and Michel Desmons

Subjects
particle beam transport, RF cavities, power RF sources, medical accelerator technology, accelerators for industry, accelerators for materials science, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

We describe and compare two optimized design options of RF linear accelerators with different resonant frequencies at 162.5 MHz (f0) and 325 MHz (2∙f0). The RFQ + DTL linacs have been designed to provide 13 MeV acceleration to a proton beam for achieving a fast neutron yield of not lower than 1013 n/s via 9Be(p, n)9B reaction in pulsed-mode operation. Our design studies show that none of the two options is better than the other, but that the choice of operating frequency will mainly be determined by the accelerator length and RF cost consideration. This study can serve as a basis for the design of an initial stage of a new high brilliance Compact Accelerator-driven Neutron Source (CANS), aiming to use neutron scattering techniques for studying material properties in fundamental physics, materials science, nuclear energy, as well as for industries and societal challenges.

Published
2021
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2. Two Design Options for Compact Linear Accelerators for High Flux Neutron Source

Author

Xiaowen Zhu, Claude Marchand, Olivier Piquet, and Michel Desmons

Subjects
Fluid Flow and Transfer Processes, medical accelerator technology, Technology, particle beam transport, RF cavities, power RF sources, accelerators for industry, accelerators for materials science, QH301-705.5, Process Chemistry and Technology, Physics, QC1-999, General Engineering, Engineering (General). Civil engineering (General), Computer Science Applications, Chemistry, General Materials Science, TA1-2040, Biology (General), Instrumentation, QD1-999
Abstract

We describe and compare two optimized design options of RF linear accelerators with different resonant frequencies at 162.5 MHz (f0) and 325 MHz (2∙f0). The RFQ + DTL linacs have been designed to provide 13 MeV acceleration to a proton beam for achieving a fast neutron yield of not lower than 1013 n/s via 9Be(p, n)9B reaction in pulsed-mode operation. Our design studies show that none of the two options is better than the other, but that the choice of operating frequency will mainly be determined by the accelerator length and RF cost consideration. This study can serve as a basis for the design of an initial stage of a new high brilliance Compact Accelerator-driven Neutron Source (CANS), aiming to use neutron scattering techniques for studying material properties in fundamental physics, materials science, nuclear energy, as well as for industries and societal challenges.

Published
2022

3. High-frequency structure design and RF stability analysis of a 4-vane radio frequency quadrupole with pi-mode stabilizer loops

Author

Xiao-Wen Zhu, Claude Marchand, Olivier Piquet, Michel Desmons, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Accelerator Physics (physics.acc-ph), Nuclear and High Energy Physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Nuclear Theory, FOS: Physical sciences, Electromagnetic design, Accelerator-based neutron source, 4-vane RFQ accelerator, Pi-mode stabilizer loops, Nuclear Energy and Engineering, Physics::Accelerator Physics, Physics - Accelerator Physics, Nuclear Experiment, Perturbative analysis, Multipacting simulation
Abstract

International audience; Compact accelerator-based neutron source facilities are garnering attention and play an important and expanding role in material and engineering sciences, as well as in neutron science education and training. Neutrons are produced by bombarding a low-energy proton beam onto a beryllium or lithium target. In such an accelerator-based neutron source, a radio frequency quadrupole (RFQ) is usually utilized to accelerate a high-intensity proton beam to a few MeV. This study mainly covers the high-frequency structure design optimizations of a 4-vane RFQ with pi-mode stabilizer loops (PISLs) and its RF stability analysis. A 176 MHz RFQ accelerator is designed to operate at a 10% duty factor and could accelerate an 80 mA proton beam from 65 keV to 2.5 MeV within a length of 5.3 m. The adoption of PISLs ensures high RF stability, eases the operation of the accelerator, and implies less stringent alignment and machining tolerances.

Published
2022
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4. 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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5. Final results of power conditioning of SPIRAL 2 couplers

Author

P.E. Bernaudin, C. Marchand, R. Ferdinand, R. Martret, F. Vezzu, Olivier Piquet, D. Longuevergne, Pierre Bosland, Frederic Chatelet, T. Cabanel, J.Lesrel, P. De Lamberterie, J. Giraud, M. Baylac, L. Maurice, L. Renard, Y. Gómez Martínez, G. Olry, C. Joly, P. Boge, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), 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), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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 Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Physics, Nuclear and High Energy Physics, Test bench, 010308 nuclear & particles physics, Nuclear engineering, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 01 natural sciences, 7. Clean energy, Superconducting accelerator, Conditioning process, Linear particle accelerator, 010305 fluids & plasmas, Power (physics), 0103 physical sciences, Spiral (railway), Antenna (radio), Instrumentation
Abstract

International audience; Cryomodules of the superconducting accelerator SPIRAL 2 have been successfully qualified and are now under commissioning on the linac at GANIL (France). This paper presents the successful results of the power conditioning of the couplers both on a test bench in Grenoble and during the cryomodules qualification. It also shows the influence of some factors, such as surface state and experiencing a cavity quench around the antenna, on the power conditioning process (duration, quality).

Published
2017
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