Coupling impedances and wakefields are fundamental quantities to characterize the electromagnetic interaction of a particle beam with the surrounding environment. In particular, collective effects, triggered by these self-induced fields, may play an important role in beam stability and machine performance. Within the framework of the LHC Injectors Upgrade project, since a significantly higher beam intensity is planned for the CERN Proton Synchrotron, wakefields are expected to increase their influence on the beam dynamics, and their evaluation is becoming important. In this paper we present the results of recent measurements of the longitudinal broadband coupling impedance by means of the incoherent quadrupole synchrotron frequency shift as a function of beam intensity. A detailed evaluation of the contribution of several machine installations to the total impedance budget is also presented and compared with the measurements. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Beam-wall interaction in the CERN Proton Synchrotron for the LHC upgrade / Migliorati, Mauro; S., Persichelli; H., Damerau; S., Gilardoni; S., Hancock; Palumbo, Luigi. - In: PHYSICAL REVIEW SPECIAL TOPICS. ACCELERATORS AND BEAMS. - ISSN 1098-4402. - 16:3(2013), pp. 031001-1-031001-11. [10.1103/physrevstab.16.031001]

Beam-wall interaction in the CERN Proton Synchrotron for the LHC upgrade

MIGLIORATI, Mauro;PALUMBO, Luigi
2013

Abstract

Coupling impedances and wakefields are fundamental quantities to characterize the electromagnetic interaction of a particle beam with the surrounding environment. In particular, collective effects, triggered by these self-induced fields, may play an important role in beam stability and machine performance. Within the framework of the LHC Injectors Upgrade project, since a significantly higher beam intensity is planned for the CERN Proton Synchrotron, wakefields are expected to increase their influence on the beam dynamics, and their evaluation is becoming important. In this paper we present the results of recent measurements of the longitudinal broadband coupling impedance by means of the incoherent quadrupole synchrotron frequency shift as a function of beam intensity. A detailed evaluation of the contribution of several machine installations to the total impedance budget is also presented and compared with the measurements. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
2013
particle accelerators; wakefields; impedance
01 Pubblicazione su rivista::01a Articolo in rivista
Beam-wall interaction in the CERN Proton Synchrotron for the LHC upgrade / Migliorati, Mauro; S., Persichelli; H., Damerau; S., Gilardoni; S., Hancock; Palumbo, Luigi. - In: PHYSICAL REVIEW SPECIAL TOPICS. ACCELERATORS AND BEAMS. - ISSN 1098-4402. - 16:3(2013), pp. 031001-1-031001-11. [10.1103/physrevstab.16.031001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/513423
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