LHC Beam Vacuum Evolution During 2015 Machine Operation

The LHC successfully returned to operation in April, 2015 after almost 2 years of Long Shutdown 1 (LS1) for various upgrade and consolidation programs. During 2015 operation, the LHC operated for more than 1000 fills. The 2015 LHC proton physics ended with 2244 bunches per beam circulating with 25 n...

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Detalles Bibliográficos
Autores principales: Yin Vallgren, Christina, Bregliozzi, Giuseppe, Chiggiato, Paolo
Lenguaje:eng
Publicado: 2016
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2016-THPMY010
http://cds.cern.ch/record/2207469
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author Yin Vallgren, Christina
Bregliozzi, Giuseppe
Chiggiato, Paolo
author_facet Yin Vallgren, Christina
Bregliozzi, Giuseppe
Chiggiato, Paolo
author_sort Yin Vallgren, Christina
collection CERN
description The LHC successfully returned to operation in April, 2015 after almost 2 years of Long Shutdown 1 (LS1) for various upgrade and consolidation programs. During 2015 operation, the LHC operated for more than 1000 fills. The 2015 LHC proton physics ended with 2244 bunches per beam circulating with 25 ns bunch spacing at top energy of 6.5 TeV. This paper summarizes the dynamic vacuum observations in different locations along the LHC during dedicated fills as well as during physics runs with both 50 ns and 25 ns bunch spacing. The causes for the dynamic pressure rises are investigated and are presented. A clear beam conditioning effect is observed, as well as a so-called de-conditioning effect. Furthermore, for the experimental areas, the dynamic pressure evolution is also presented.
id oai-inspirehep.net-1470590
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
record_format invenio
spelling oai-inspirehep.net-14705902022-08-10T12:48:21Zdoi:10.18429/JACoW-IPAC2016-THPMY010http://cds.cern.ch/record/2207469engYin Vallgren, ChristinaBregliozzi, GiuseppeChiggiato, PaoloLHC Beam Vacuum Evolution During 2015 Machine OperationAccelerators and Storage RingsThe LHC successfully returned to operation in April, 2015 after almost 2 years of Long Shutdown 1 (LS1) for various upgrade and consolidation programs. During 2015 operation, the LHC operated for more than 1000 fills. The 2015 LHC proton physics ended with 2244 bunches per beam circulating with 25 ns bunch spacing at top energy of 6.5 TeV. This paper summarizes the dynamic vacuum observations in different locations along the LHC during dedicated fills as well as during physics runs with both 50 ns and 25 ns bunch spacing. The causes for the dynamic pressure rises are investigated and are presented. A clear beam conditioning effect is observed, as well as a so-called de-conditioning effect. Furthermore, for the experimental areas, the dynamic pressure evolution is also presented.CERN-ACC-2016-154oai:inspirehep.net:14705902016
spellingShingle Accelerators and Storage Rings
Yin Vallgren, Christina
Bregliozzi, Giuseppe
Chiggiato, Paolo
LHC Beam Vacuum Evolution During 2015 Machine Operation
title LHC Beam Vacuum Evolution During 2015 Machine Operation
title_full LHC Beam Vacuum Evolution During 2015 Machine Operation
title_fullStr LHC Beam Vacuum Evolution During 2015 Machine Operation
title_full_unstemmed LHC Beam Vacuum Evolution During 2015 Machine Operation
title_short LHC Beam Vacuum Evolution During 2015 Machine Operation
title_sort lhc beam vacuum evolution during 2015 machine operation
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2016-THPMY010
http://cds.cern.ch/record/2207469
work_keys_str_mv AT yinvallgrenchristina lhcbeamvacuumevolutionduring2015machineoperation
AT bregliozzigiuseppe lhcbeamvacuumevolutionduring2015machineoperation
AT chiggiatopaolo lhcbeamvacuumevolutionduring2015machineoperation

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