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Single-batch filling of the CERN PS for LHC-type beams

Since the CERN PS Booster cannot simultaneously provide the beam brightness and intensity required, the nominal (25ns bunch spacing) proton beam for the LHC involves double-batch filling of the PS machine. Linac 4, which is under construction, will eventually remove this restriction. In the meantime...

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Detalles Bibliográficos
Autores principales: Carli, C, Comblin, JF, Findlay, A, Hancock, S, Hanke, K, Mikulec, B
Lenguaje:eng
Publicado: 2010
Materias:
Acceso en línea:http://cds.cern.ch/record/1272160
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author Carli, C
Comblin, JF
Findlay, A
Hancock, S
Hanke, K
Mikulec, B
author_facet Carli, C
Comblin, JF
Findlay, A
Hancock, S
Hanke, K
Mikulec, B
author_sort Carli, C
collection CERN
description Since the CERN PS Booster cannot simultaneously provide the beam brightness and intensity required, the nominal (25ns bunch spacing) proton beam for the LHC involves double-batch filling of the PS machine. Linac 4, which is under construction, will eventually remove this restriction. In the meantime, the request for 50 and 75ns bunch spacings to mitigate electron cloud effects has lowered the intensity demand such that the Booster can meet this in a single batch without compromising beam brightness. Single-batch transfer means providing two bunches from each of three Booster rings and, in turn, that the bunch spacing is modified by the addition of an h=1 rf component to the h=2 in the Booster in order to fit the h=7 rf buckets waiting in the PS (whilst leaving one bucket empty for kicker purposes). Following the first experiments performed in 2008, the rf manipulations in the Booster have been refined and those in the PS have been modified to cope with single-batch beams. This latest work is presented for both the 50 and 75ns variants.
id cern-1272160
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
record_format invenio
spelling cern-12721602022-08-17T13:27:59Zhttp://cds.cern.ch/record/1272160engCarli, CComblin, JFFindlay, AHancock, SHanke, KMikulec, BSingle-batch filling of the CERN PS for LHC-type beamsAccelerators and Storage RingsSince the CERN PS Booster cannot simultaneously provide the beam brightness and intensity required, the nominal (25ns bunch spacing) proton beam for the LHC involves double-batch filling of the PS machine. Linac 4, which is under construction, will eventually remove this restriction. In the meantime, the request for 50 and 75ns bunch spacings to mitigate electron cloud effects has lowered the intensity demand such that the Booster can meet this in a single batch without compromising beam brightness. Single-batch transfer means providing two bunches from each of three Booster rings and, in turn, that the bunch spacing is modified by the addition of an h=1 rf component to the h=2 in the Booster in order to fit the h=7 rf buckets waiting in the PS (whilst leaving one bucket empty for kicker purposes). Following the first experiments performed in 2008, the rf manipulations in the Booster have been refined and those in the PS have been modified to cope with single-batch beams. This latest work is presented for both the 50 and 75ns variants.CERN-ATS-2010-118oai:cds.cern.ch:12721602010-06-14
spellingShingle Accelerators and Storage Rings
Carli, C
Comblin, JF
Findlay, A
Hancock, S
Hanke, K
Mikulec, B
Single-batch filling of the CERN PS for LHC-type beams
title Single-batch filling of the CERN PS for LHC-type beams
title_full Single-batch filling of the CERN PS for LHC-type beams
title_fullStr Single-batch filling of the CERN PS for LHC-type beams
title_full_unstemmed Single-batch filling of the CERN PS for LHC-type beams
title_short Single-batch filling of the CERN PS for LHC-type beams
title_sort single-batch filling of the cern ps for lhc-type beams
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1272160
work_keys_str_mv AT carlic singlebatchfillingofthecernpsforlhctypebeams
AT comblinjf singlebatchfillingofthecernpsforlhctypebeams
AT findlaya singlebatchfillingofthecernpsforlhctypebeams
AT hancocks singlebatchfillingofthecernpsforlhctypebeams
AT hankek singlebatchfillingofthecernpsforlhctypebeams
AT mikulecb singlebatchfillingofthecernpsforlhctypebeams