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3 results on '"beam: deflection"'

1. Double-crystal measurements at the CERN SPS

Author

L. Burmistrov, Luigi Salvatore Esposito, Stefano Redaelli, A. Stocchi, George Smirnov, Yu.A. Gavrikov, W. Scandale, Alexander Kovalenko, Roberto Rossi, V. A. Maisheev, L.G. Malyarenko, S. Montesano, Simone Gilardoni, G. Hall, A.A. Durum, Gianluigi Arduini, Alexander M. Taratin, F. Addesa, A.S. Denisov, Vyacheslav V. Skorobogatov, Yu. M. Ivanov, F. Galluccio, Yu.E. Sandomirskiy, Yu. A. Chesnokov, V. Puill, A.A. Yanovich, Daniele Mirarchi, F. Cerutti, Johan Borg, Mark Pesaresi, A. Natochii, S. Dubos, F. Murtas, A. G. Afonin, M. Garattini, Thomas James, M. D’Andrea, L.P. Lapina, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
Accelerator Physics (physics.acc-ph), Nuclear and High Energy Physics, Beam loss monitor, Physics::Instrumentation and Detectors, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], baryon: electric moment, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, crystal, Nuclear physics, Timepix, Position (vector), 0103 physical sciences, 010306 general physics, Nuclear Experiment, Instrumentation, physics.acc-ph, Physics beyond collider, Physics, Large Hadron Collider, Magnetic moment, 010308 nuclear & particles physics, beam: deflection, Detector, Double-crystal, CERN SPS, Super Proton Synchrotron, Accelerators and Storage Rings, channeling, Baryon, CERN LHC Coll, beam monitoring: beam loss, charged particle: trajectory, efficiency, Physics::Accelerator Physics, baryon: magnetic moment, High Energy Physics::Experiment, Physics - Accelerator Physics, Actuator, numerical calculations: Monte Carlo, Beam (structure)
Abstract

The UA9 setup, installed in the Super Proton Synchrotron (SPS) at CERN, was exploited for a proof of principle of the double-crystal scenario, proposed to measure the electric and the magnetic moments of short-lived baryons in a high-energy hadron collider, such as the Large Hadron Collider (LHC). Linear and angular actuators were used to position the crystals and establish the required beam configuration. Timepix detectors and high-sensitivity Beam Loss Monitors were exploited to observe the deflected beams. Linear and angular scans allowed exploring the particle interactions with the two crystals and recording their efficiency. The measured values of the beam trajectories, profiles and of the channeling efficiency agree with the results of a Monte-Carlo simulation., 25 pages, 13 figures

Published
2021
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2. Effect of Electrostatic Deflectors and Fringe Fields on Spin for Hadron Electric Dipole Moment Measurements on Storage Rings

Author

Michaud, Julien, De Conto, Jean-Marie, Gómez Martínez, Yolanda, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), 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), 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 ), and Université Grenoble Alpes (UGA)

Subjects
polarization, deuteron: electric moment, storage-ring, beam: deflection, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], vacuum, p: electric moment, 7. Clean energy, Accelerator Physics, polarization: stability, electrode: design, MC4: Hadron Accelerators, p: storage ring, Physics::Accelerator Physics, controls, spin: polarization, numerical calculations, electrostatic, dipole
Abstract

The observed matter-antimatter asymmetry in the universe cannot be explained by the Standard Model. An explanation is a non-vanishing Electric Dipole Moment of subatomic particles. The JEDI (Jülich Electric Dipole moment Investigations) collaboration is preparing a direct EDM measurement of protons and deuterons first at the storage ring COSY (COoler SYnchrotron) and later at a dedicated storage ring. To achieve this, one needs a stable polarization, i.e. around 1000 seconds for spin coherence time. One source of decoherence are the electrostatic deflectors, and this must be quantified. We developed an analytical model for cylindrical deflectors, including fringe fields, and the associated beam and spin transfer functions, integrated over the deflector. All boundaries (including ground) are considered, giving a realistic, accurate field map up to any order. We get universal formulas, the only adjustable parameter being the deflector gap/radius ratio, all other terms being numerical. This has been implemented in BMAD. We present the mathematical, physical and numerical developments, as well as results for a proton storage ring., Proceedings of the 10th Int. Particle Accelerator Conf., IPAC2019, Melbourne, Australia

Published
2019
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3. Focusing of 180 GeV/c pions from a point-like source into a parallel beam by a bent silicon crystal

Author

Francesco Iacoangeli, M. Romagnoni, A. Mazzolari, A. Stocchi, A.A. Durum, George Smirnov, W. Scandale, Yu.A. Gavrikov, A. Masi, Yu. M. Ivanov, Vincenzo Guidi, A. G. Afonin, Stefano Redaelli, J. Maalmi, F. Cerutti, M. Garattini, L.G. Malyarenko, Thomas James, V. Chaumat, G. Cavoto, A.A. Yanovich, A. Natochii, Alexander M. Taratin, Gianluigi Arduini, Simone Gilardoni, Enrico Bagli, Daniele Mirarchi, F. Murtas, A. Lechner, L.P. Lapina, Geoffrey Hall, Johan Borg, V. Puill, A.S. Denisov, S. Montesano, Georg Auzinger, F. Galluccio, Roberto Rossi, V. A. Maisheev, L. Burmistrov, Mark Pesaresi, Yu. A. Chesnokov, D. Breton, Roberto Losito, F. Addesa, S. Dubos, Laura Bandiera, Vyacheslav V. Skorobogatov, Yu.E. Sandomirskiy, Alexander Kovalenko, Laboratoire de l'Accélérateur Linéaire (LAL), 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), and 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)

Subjects
Nuclear and High Energy Physics, Proton, silicon: bent crystal, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Bent molecular geometry, Beam focusing, Crystal channeling, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Collimated light, NO, Crystal, Monocrystalline silicon, Pion, Optics, 0103 physical sciences, pi: beam, 010306 general physics, Particle beam, Instrumentation, Physics, 010308 nuclear & particles physics, business.industry, beam: deflection, beam optics, efficiency, crystal: channeling, Particle, Physics::Accelerator Physics, business
Abstract

International audience; At large accelerators, bent crystals are employed to deflect weakly divergent proton beams at the stages of extraction and collimation. We demonstrate that a divergent particle beam may be efficiently deflected using a crystal with a focusing entry face. A 180 GeV/c pion beam with divergence near 0.060 mrad, which exceeds the Lindhard angle by a factor of 4, has been experimentally deflected by 0.25 mrad with efficiency near 22%. The proposed focusing crystal may serve as an element of a novel particle optics for secondary-particle beams in the TeV energy region.

Published
2019
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