Effect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational Considerations

Coherent instabilities of bunches in the LHC bunch train can be observed when the tune spread from beam-beam interactions becomes insufficient to ensure Landau damping. In particular these effects are seen on bunches with a reduced number of beam-beam interactions due to their collision pattern. Fur...

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Detalles Bibliográficos
Autores principales: Papotti, G, Arduini, G, Giachino, R, Herr, W, Metral, E, Pieloni, T, White, S M, Buffat, X, Mounet, N
Lenguaje:eng
Publicado: 2013
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1581725
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author Papotti, G
Arduini, G
Giachino, R
Herr, W
Metral, E
Pieloni, T
White, S M
Buffat, X
Mounet, N
author_facet Papotti, G
Arduini, G
Giachino, R
Herr, W
Metral, E
Pieloni, T
White, S M
Buffat, X
Mounet, N
author_sort Papotti, G
collection CERN
description Coherent instabilities of bunches in the LHC bunch train can be observed when the tune spread from beam-beam interactions becomes insufficient to ensure Landau damping. In particular these effects are seen on bunches with a reduced number of beam-beam interactions due to their collision pattern. Furthermore, such a reduction of the necessary stability can occur during the processes when the beams are prepared for collisions or during the optimization procedure. We discuss observations and possible countermeasures, in particular alternatives to the existing beam manipulation processes where such a situation can occur.
id cern-1581725
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15817252019-09-30T06:29:59Zhttp://cds.cern.ch/record/1581725engPapotti, GArduini, GGiachino, RHerr, WMetral, EPieloni, TWhite, S MBuffat, XMounet, NEffect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational ConsiderationsAccelerators and Storage RingsCoherent instabilities of bunches in the LHC bunch train can be observed when the tune spread from beam-beam interactions becomes insufficient to ensure Landau damping. In particular these effects are seen on bunches with a reduced number of beam-beam interactions due to their collision pattern. Furthermore, such a reduction of the necessary stability can occur during the processes when the beams are prepared for collisions or during the optimization procedure. We discuss observations and possible countermeasures, in particular alternatives to the existing beam manipulation processes where such a situation can occur.CERN-ACC-2013-0138oai:cds.cern.ch:15817252013-05-12
spellingShingle Accelerators and Storage Rings
Papotti, G
Arduini, G
Giachino, R
Herr, W
Metral, E
Pieloni, T
White, S M
Buffat, X
Mounet, N
Effect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational Considerations
title Effect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational Considerations
title_full Effect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational Considerations
title_fullStr Effect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational Considerations
title_full_unstemmed Effect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational Considerations
title_short Effect of Collision Pattern in the LHC on the Beam Stability: Requirements from Experiments and Operational Considerations
title_sort effect of collision pattern in the lhc on the beam stability: requirements from experiments and operational considerations
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1581725
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