Thresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPS

A fourth harmonic RF system is used in the SPS as a Landau cavity, in order to stabilize the high intensity LHC proton beam against the longitudinal instabilities. Numerous studies proved that operating the two RF systems, through the whole cycle, in bunch shortening mode is necessary to provide a g...

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Detalles Bibliográficos
Autores principales: Argyropoulos, T, Bohl, T, Muller, J E, Shaposhnikova, E, Timko, H, Bhat, C
Lenguaje:eng
Publicado: 2012
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1460936
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author Argyropoulos, T
Bohl, T
Muller, J E
Shaposhnikova, E
Timko, H
Bhat, C
author_facet Argyropoulos, T
Bohl, T
Muller, J E
Shaposhnikova, E
Timko, H
Bhat, C
author_sort Argyropoulos, T
collection CERN
description A fourth harmonic RF system is used in the SPS as a Landau cavity, in order to stabilize the high intensity LHC proton beam against the longitudinal instabilities. Numerous studies proved that operating the two RF systems, through the whole cycle, in bunch shortening mode is necessary to provide a good quality beam at extraction to the LHC. Furthermore, it was shown that the choice of RF parameters as voltage amplitude ratio and relative phase are critical for the beam stability. This paper presents the results of single bunch measurements performed in single and double RF systems with various RF settings and compares them with the results of macroparticle simulations for the SPS impedance model.
id cern-1460936
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-14609362022-08-17T13:28:52Zhttp://cds.cern.ch/record/1460936engArgyropoulos, TBohl, TMuller, J EShaposhnikova, ETimko, HBhat, CThresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPSAccelerators and Storage RingsA fourth harmonic RF system is used in the SPS as a Landau cavity, in order to stabilize the high intensity LHC proton beam against the longitudinal instabilities. Numerous studies proved that operating the two RF systems, through the whole cycle, in bunch shortening mode is necessary to provide a good quality beam at extraction to the LHC. Furthermore, it was shown that the choice of RF parameters as voltage amplitude ratio and relative phase are critical for the beam stability. This paper presents the results of single bunch measurements performed in single and double RF systems with various RF settings and compares them with the results of macroparticle simulations for the SPS impedance model.CERN-ATS-2012-148oai:cds.cern.ch:14609362012-04-01
spellingShingle Accelerators and Storage Rings
Argyropoulos, T
Bohl, T
Muller, J E
Shaposhnikova, E
Timko, H
Bhat, C
Thresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPS
title Thresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPS
title_full Thresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPS
title_fullStr Thresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPS
title_full_unstemmed Thresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPS
title_short Thresholds of Longitudinal Single Bunch Instability in Single and Double RF systems in the CERN SPS
title_sort thresholds of longitudinal single bunch instability in single and double rf systems in the cern sps
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1460936
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AT bohlt thresholdsoflongitudinalsinglebunchinstabilityinsingleanddoublerfsystemsinthecernsps
AT mullerje thresholdsoflongitudinalsinglebunchinstabilityinsingleanddoublerfsystemsinthecernsps
AT shaposhnikovae thresholdsoflongitudinalsinglebunchinstabilityinsingleanddoublerfsystemsinthecernsps
AT timkoh thresholdsoflongitudinalsinglebunchinstabilityinsingleanddoublerfsystemsinthecernsps
AT bhatc thresholdsoflongitudinalsinglebunchinstabilityinsingleanddoublerfsystemsinthecernsps

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