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Study of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton Synchrotron

This Master thesis work has been carried out at CERN in the framework of the LHC (Large Hadron Collider) Injector upgrade program (LIU). Longitudinal coupled-bunch (CB) oscillations are an important limitation for the high-brightness beam accelerated in the CERN Proton Synchrotron. Up to present int...

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Autor principal: Ventura, Letizia
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:http://cds.cern.ch/record/1625120
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author Ventura, Letizia
author_facet Ventura, Letizia
author_sort Ventura, Letizia
collection CERN
description This Master thesis work has been carried out at CERN in the framework of the LHC (Large Hadron Collider) Injector upgrade program (LIU). Longitudinal coupled-bunch (CB) oscillations are an important limitation for the high-brightness beam accelerated in the CERN Proton Synchrotron. Up to present intensities they are suppressed by a dedicated feedback system limited to the first two dominant oscillation modes. In view of the proposed installation of a new wide-band FB system in the framework of the LIU program, measurements have been performed on the old system with the aim of dimensioning the new one. A new simulation program, called LCBC ( Longitudinal Coupled Bunch Simulation), has been used to study the behaviour of the CB FB. By means of this code I have started an extensive simulation campaign to benchmark the code with the theory of coupled bunch and to confirm that the 10 MHz cavity system is the main cause of the coupled bunch instabilities in the CERN PS.
id cern-1625120
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-16251202019-09-30T06:29:59Zhttp://cds.cern.ch/record/1625120engVentura, LetiziaStudy of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton SynchrotronAccelerators and Storage RingsThis Master thesis work has been carried out at CERN in the framework of the LHC (Large Hadron Collider) Injector upgrade program (LIU). Longitudinal coupled-bunch (CB) oscillations are an important limitation for the high-brightness beam accelerated in the CERN Proton Synchrotron. Up to present intensities they are suppressed by a dedicated feedback system limited to the first two dominant oscillation modes. In view of the proposed installation of a new wide-band FB system in the framework of the LIU program, measurements have been performed on the old system with the aim of dimensioning the new one. A new simulation program, called LCBC ( Longitudinal Coupled Bunch Simulation), has been used to study the behaviour of the CB FB. By means of this code I have started an extensive simulation campaign to benchmark the code with the theory of coupled bunch and to confirm that the 10 MHz cavity system is the main cause of the coupled bunch instabilities in the CERN PS.CERN-THESIS-2013-191oai:cds.cern.ch:16251202013-11-06T09:11:59Z
spellingShingle Accelerators and Storage Rings
Ventura, Letizia
Study of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton Synchrotron
title Study of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton Synchrotron
title_full Study of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton Synchrotron
title_fullStr Study of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton Synchrotron
title_full_unstemmed Study of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton Synchrotron
title_short Study of longitudinal multibunch instabilities for LHC-type beams at the CERN Proton Synchrotron
title_sort study of longitudinal multibunch instabilities for lhc-type beams at the cern proton synchrotron
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1625120
work_keys_str_mv AT venturaletizia studyoflongitudinalmultibunchinstabilitiesforlhctypebeamsatthecernprotonsynchrotron