Search Results - "Métral, E"

Imaginary tune split and repulsion single-bunch instability mechanism in the presence of a resistive transverse damper and its mitigation by Métral, E.

“…A resistive transverse damper is often needed in particle accelerators operating with many bunches and it is usually very efficient as it can considerably…”
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Intrabunch motion by Métral, E.

“…Impedance-driven (but not only) coherent beam instabilities are usually studied analytically with the linearized Vlasov equation, ending up with an eigenvalue…”
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Longitudinal and transverse mode coupling instability: Vlasov solvers and tracking codes by Métral, E., Migliorati, M.

“…The study of collective effects in circular accelerators can be tackled by solving numerically the Vlasov equation or by using tracking codes. The two methods…”
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Fast-slow mode coupling instability for coasting beams in the presence of detuning impedance by Biancacci, N., Métral, E., Migliorati, M.

“…A destabilizing effect of the detuning impedance has been recently observed in simulations of the CERN Proton Synchrotron (PS) at the injection energy: while…”
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Proof-of-Principle Direct Measurement of Landau Damping Strength at the Large Hadron Collider with an Antidamper by Antipov, S A, Amorim, D, Biancacci, N, Buffat, X, Métral, E, Mounet, N, Oeftiger, A, Valuch, D

“…Landau damping is an essential mechanism for ensuring collective beam stability in particle accelerators. Precise knowledge of the strength of Landau damping…”
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Reply to “Comment on ‘Fast-slow mode coupling instability for coasting beams in the presence of detuning impedance’” by Biancacci, N., Métral, E., Migliorati, M.

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Erratum: Reply to “Comment on ‘Fast-slow mode coupling instability for coasting beams in the presence of detuning impedance’” [Phys. Rev. Accel. Beams 24 , 078002 (2021)] by Biancacci, N., Métral, E., Migliorati, M.

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Description of beam instabilities in synchrotrons with wakefields and space charge forces using the circulant matrix model by Buffat, X., Métral, E., Gottlob, E., Høgh, C., Oeftiger, A., Pieloni, T.

“…A new model for the description of beam instabilities in synchrotrons featuring wakefields and space charge forces is proposed, using the circulant matrix…”
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Simulations and measurements of the transverse mode coupling instability in the LHC by Amorim, D., Antipov, S. A., Biancacci, N., Buffat, X., Mereghetti, A., Métral, E., Mounet, N., Redaelli, S., Salvant, B., Valuch, D.

“…The High Luminosity (HL) upgrade of the Large Hadron Collider (LHC) will increase the peak luminosity at the experiments by more than a factor of 5 with…”
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Transverse beam instabilities in the presence of linear coupling in the Large Hadron Collider by Carver, L. R., Buffat, X., Li, K., Métral, E., Schenk, M.

“…In the past, transverse coherent instabilities have been observed at the Hadron-Electron Ring Accelerator (HERA) proton ring that were instigated by the…”
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Beam transfer function measurements used to probe the transverse Landau damping at the LHC by Tambasco, C., Pieloni, T., Barranco, J., Buffat, X., Levens, T., Métral, E., Salvachua, B.

“…The Landau damping mechanism stabilizes the impedance driven head-tail modes in hadron synchrotrons. Because of the frequent coherent beam instabilities…”
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Experimental stabilization of transverse collective instabilities in the LHC with second order chromaticity by Schenk, M., Buffat, X., Carver, L. R., De Maria, R., Li, K., Métral, E.

“…This paper discusses measurements on the stabilization of single bunches with second order chromaticity (Q′′) in the Large Hadron Collider (LHC) at…”
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Instability studies at the CERN Proton Synchrotron during transition crossing by Migliorati, M., Aumon, S., Koukovini-Platia, E., Huschauer, A., Métral, E., Sterbini, G., Wang, N.

“…The CERN Proton Synchrotron (PS) routinely crosses transition energy at around 6 GeV in order to accelerate protons that are injected in the Super Proton…”
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Effect of crab cavity high order modes on the coupled-bunch stability of High-Luminosity Large Hadron Collider by Antipov, S. A., Biancacci, N., Komppula, J., Métral, E., Salvant, B., Burov, A.

“…High frequency high order modes can significantly affect the coupled-bunch stability in a circular accelerator. With a large enough shunt impedance they may…”
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Reply to “Comment on “Instability Studies at the CERN Proton Synchrotron during transition crossing”” by Migliorati, M., Aumon, S., Koukovini-Platia, E., Huschauer, A., Métral, E., Sterbini, G., Wang, N.

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Transverse beam stability with low-impedance collimators in the High-Luminosity Large Hadron Collider: Status and challenges by Antipov, S. A., Accettura, C., Amorim, D., Bertarelli, A., Biancacci, N., Bruce, R., Carideo, E., Carra, F., Guardia Valenzuela, J., Mereghetti, A., Métral, E., Redaelli, S., Salvant, B., Valuch, D.

“…The High-Luminosity LHC Project aims to increase the integrated luminosity that will be collected by the Large Hadron Collider for the needs of the high energy…”
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Impedance studies of 2D azimuthally symmetric devices of finite length by Biancacci, N., Vaccaro, V. G., Métral, E., Salvant, B., Migliorati, M., Palumbo, L.

“…In particle accelerators, the beam quality can be strongly affected by the interaction with self-induced electromagnetic fields excited by the beam in the…”
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Impedance simulations and measurements on the LHC collimators with embedded beam position monitors by Biancacci, N., Caspers, F., Kuczerowski, J., Métral, E., Mounet, N., Salvant, B., Mostacci, A., Frasciello, O., Zobov, M.

“…The LHC collimation system is a critical element for the safe operation of the LHC machine. The necessity of fast accurate positioning of the collimator’s…”
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Publisher’s Note: Impedance studies of 2D azimuthally symmetric devices of finite length [Phys. Rev. ST Accel. Beams 17 , 021001 (2014)] by Biancacci, N., Vaccaro, V. G., Métral, E., Salvant, B., Migliorati, M., Palumbo, L.

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Dependence of the electron-cloud instability on the beam energy by Rumolo, G, Arduini, G, Métral, E, Shaposhnikova, E, Benedetto, E, Calaga, R, Papotti, G, Salvant, B

“…The electron cloud (EC) can be formed in the beam pipe of a circular accelerator if the secondary emission yield (SEY) of the inner surface is larger than 1,…”
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