Flat bunches in the LHC

A high harmonic RF system which could serve multiple purposes was proposed for the LHC. Possible applications of the second harmonic RF system include beam stabilisation in the longitudinal plane in absence of wide-band longitudinal feedback and reduction of bunch peak line density. Apart from other...

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Detalles Bibliográficos
Autores principales: Shaposhnikova, E, Argyropoulos, T, Baudrenghien, P, Mastoridis, T, Muller, J E, Papotti, G, Salvant, B, Timko, H, Bhat, C, Burov, A
Lenguaje:eng
Publicado: 2014
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1742116
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author Shaposhnikova, E
Argyropoulos, T
Baudrenghien, P
Mastoridis, T
Muller, J E
Papotti, G
Salvant, B
Timko, H
Bhat, C
Burov, A
author_facet Shaposhnikova, E
Argyropoulos, T
Baudrenghien, P
Mastoridis, T
Muller, J E
Papotti, G
Salvant, B
Timko, H
Bhat, C
Burov, A
author_sort Shaposhnikova, E
collection CERN
description A high harmonic RF system which could serve multiple purposes was proposed for the LHC. Possible applications of the second harmonic RF system include beam stabilisation in the longitudinal plane in absence of wide-band longitudinal feedback and reduction of bunch peak line density. Apart from other useful features flat bunches are expected to produce less beam-induced heating below 1 GHz, the frequency region critical for some LHC equipment. The latter however can also be achieved by de-populating the bunch center. This was demonstrated during the dedicated machine development session in the LHC using RF phase modulation. In this paper the results of tests with single bunches and nominal LHC beams are presented and possible use of this technique in LHC operation is discussed.
id cern-1742116
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
record_format invenio
spelling cern-17421162022-08-17T13:31:19Zhttp://cds.cern.ch/record/1742116engShaposhnikova, EArgyropoulos, TBaudrenghien, PMastoridis, TMuller, J EPapotti, GSalvant, BTimko, HBhat, CBurov, AFlat bunches in the LHCAccelerators and Storage RingsA high harmonic RF system which could serve multiple purposes was proposed for the LHC. Possible applications of the second harmonic RF system include beam stabilisation in the longitudinal plane in absence of wide-band longitudinal feedback and reduction of bunch peak line density. Apart from other useful features flat bunches are expected to produce less beam-induced heating below 1 GHz, the frequency region critical for some LHC equipment. The latter however can also be achieved by de-populating the bunch center. This was demonstrated during the dedicated machine development session in the LHC using RF phase modulation. In this paper the results of tests with single bunches and nominal LHC beams are presented and possible use of this technique in LHC operation is discussed.CERN-ACC-2014-0100oai:cds.cern.ch:17421162014
spellingShingle Accelerators and Storage Rings
Shaposhnikova, E
Argyropoulos, T
Baudrenghien, P
Mastoridis, T
Muller, J E
Papotti, G
Salvant, B
Timko, H
Bhat, C
Burov, A
Flat bunches in the LHC
title Flat bunches in the LHC
title_full Flat bunches in the LHC
title_fullStr Flat bunches in the LHC
title_full_unstemmed Flat bunches in the LHC
title_short Flat bunches in the LHC
title_sort flat bunches in the lhc
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1742116
work_keys_str_mv AT shaposhnikovae flatbunchesinthelhc
AT argyropoulost flatbunchesinthelhc
AT baudrenghienp flatbunchesinthelhc
AT mastoridist flatbunchesinthelhc
AT mullerje flatbunchesinthelhc
AT papottig flatbunchesinthelhc
AT salvantb flatbunchesinthelhc
AT timkoh flatbunchesinthelhc
AT bhatc flatbunchesinthelhc
AT burova flatbunchesinthelhc

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