Transverse emittance preservation through the LHC cycle

The preservation of the transverse emittance is crucial for luminosity performance. At the LHC design stage the total allowed emittance increase was set to 7% throughout the LHC cycle. The proton run in 2010 showed that the injectors can provide beams with smaller emittances than nominal and higher...

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Detalles Bibliográficos
Autores principales: Kain, V, Goddard, B, Holzer, BJ, Jowett, JM, Meddahi, M, Mertens, T, Roncarolo, F
Lenguaje:eng
Publicado: 2011
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1379159
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author Kain, V
Goddard, B
Holzer, BJ
Jowett, JM
Meddahi, M
Mertens, T
Roncarolo, F
author_facet Kain, V
Goddard, B
Holzer, BJ
Jowett, JM
Meddahi, M
Mertens, T
Roncarolo, F
author_sort Kain, V
collection CERN
description The preservation of the transverse emittance is crucial for luminosity performance. At the LHC design stage the total allowed emittance increase was set to 7% throughout the LHC cycle. The proton run in 2010 showed that the injectors can provide beams with smaller emittances than nominal and higher bunch intensities. The LHC parameters are well under control and the emittances are kept below nominal until physics. The LHC luminosity goals for the first year of running could therefore be achieved with fewer bunches than initially foreseen. This paper will report on the measured emittance growth at injection from the SPS and the evolution of the emittance through the entire LHC cycle. Sources and possible cures for the observed emittance growth will be discussed.
id cern-1379159
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13791592022-08-17T13:25:14Zhttp://cds.cern.ch/record/1379159engKain, VGoddard, BHolzer, BJJowett, JMMeddahi, MMertens, TRoncarolo, FTransverse emittance preservation through the LHC cycleAccelerators and Storage RingsThe preservation of the transverse emittance is crucial for luminosity performance. At the LHC design stage the total allowed emittance increase was set to 7% throughout the LHC cycle. The proton run in 2010 showed that the injectors can provide beams with smaller emittances than nominal and higher bunch intensities. The LHC parameters are well under control and the emittances are kept below nominal until physics. The LHC luminosity goals for the first year of running could therefore be achieved with fewer bunches than initially foreseen. This paper will report on the measured emittance growth at injection from the SPS and the evolution of the emittance through the entire LHC cycle. Sources and possible cures for the observed emittance growth will be discussed.CERN-ATS-2011-056oai:cds.cern.ch:13791592011-09-01
spellingShingle Accelerators and Storage Rings
Kain, V
Goddard, B
Holzer, BJ
Jowett, JM
Meddahi, M
Mertens, T
Roncarolo, F
Transverse emittance preservation through the LHC cycle
title Transverse emittance preservation through the LHC cycle
title_full Transverse emittance preservation through the LHC cycle
title_fullStr Transverse emittance preservation through the LHC cycle
title_full_unstemmed Transverse emittance preservation through the LHC cycle
title_short Transverse emittance preservation through the LHC cycle
title_sort transverse emittance preservation through the lhc cycle
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1379159
work_keys_str_mv AT kainv transverseemittancepreservationthroughthelhccycle
AT goddardb transverseemittancepreservationthroughthelhccycle
AT holzerbj transverseemittancepreservationthroughthelhccycle
AT jowettjm transverseemittancepreservationthroughthelhccycle
AT meddahim transverseemittancepreservationthroughthelhccycle
AT mertenst transverseemittancepreservationthroughthelhccycle
AT roncarolof transverseemittancepreservationthroughthelhccycle

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