Electron Cloud observation in the LHC

Operation of LHC with bunch trains at different spacings has revealed the formation of an electron cloud inside the machine. The main observations of electron cloud build up are the pressure rise measured at the vacuum gauges in the warm regions, as well as the increase of the beam screen temperatur...

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Autores principales: Rumolo, G, Arduini, G, Baglin, V, Bartosik, H, Biancacci, N, Baudrenghien, P, Bregliozzi, G, Chiggiato, P, Claudet, S, De Maria, R, Esteban-Muller, J, Favier, M, Hansen, C, Höfle, W, Jimenez, J M, Kain, V, Lanza, G, Li, K S B, Maury Cuna, G H I, Métral, E, Papotti, G, Pieloni, T, Roncarolo, F, Salvant, B, Shaposhnikova, E N, Steinhagen, R J, Tavian, L J, Valuch, D, Venturini Delsolaro, W, Zimmermann, F, Iriso, U, Dominguez, O, Koukovini-Platia, E, Mounet, N, Zannini, C, Bhat, C M
Lenguaje:eng
Publicado: 2011
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1381532
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author Rumolo, G
Arduini, G
Baglin, V
Bartosik, H
Biancacci, N
Baudrenghien, P
Bregliozzi, G
Chiggiato, P
Claudet, S
De Maria, R
Esteban-Muller, J
Favier, M
Hansen, C
Höfle, W
Jimenez, J M
Kain, V
Lanza, G
Li, K S B
Maury Cuna, G H I
Métral, E
Papotti, G
Pieloni, T
Roncarolo, F
Salvant, B
Shaposhnikova, E N
Steinhagen, R J
Tavian, L J
Valuch, D
Venturini Delsolaro, W
Zimmermann, F
Iriso, U
Dominguez, O
Koukovini-Platia, E
Mounet, N
Zannini, C
Bhat, C M
author_facet Rumolo, G
Arduini, G
Baglin, V
Bartosik, H
Biancacci, N
Baudrenghien, P
Bregliozzi, G
Chiggiato, P
Claudet, S
De Maria, R
Esteban-Muller, J
Favier, M
Hansen, C
Höfle, W
Jimenez, J M
Kain, V
Lanza, G
Li, K S B
Maury Cuna, G H I
Métral, E
Papotti, G
Pieloni, T
Roncarolo, F
Salvant, B
Shaposhnikova, E N
Steinhagen, R J
Tavian, L J
Valuch, D
Venturini Delsolaro, W
Zimmermann, F
Iriso, U
Dominguez, O
Koukovini-Platia, E
Mounet, N
Zannini, C
Bhat, C M
author_sort Rumolo, G
collection CERN
description Operation of LHC with bunch trains at different spacings has revealed the formation of an electron cloud inside the machine. The main observations of electron cloud build up are the pressure rise measured at the vacuum gauges in the warm regions, as well as the increase of the beam screen temperature in the cold regions due to an additional heat load. The effects of the electron cloud were also visible as instability and emittance growth affecting the last bunches of longer trains, which could be improved running with higher chromaticity or larger transverse emittances. A summary of the 2010 and 2011 observations and measurements and a comparison with models will be presented. The efficiency of scrubbing to improve the machine running performance will be briefly discussed.
id cern-1381532
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13815322022-08-17T13:31:09Zhttp://cds.cern.ch/record/1381532engRumolo, GArduini, GBaglin, VBartosik, HBiancacci, NBaudrenghien, PBregliozzi, GChiggiato, PClaudet, SDe Maria, REsteban-Muller, JFavier, MHansen, CHöfle, WJimenez, J MKain, VLanza, GLi, K S BMaury Cuna, G H IMétral, EPapotti, GPieloni, TRoncarolo, FSalvant, BShaposhnikova, E NSteinhagen, R JTavian, L JValuch, DVenturini Delsolaro, WZimmermann, FIriso, UDominguez, OKoukovini-Platia, EMounet, NZannini, CBhat, C MElectron Cloud observation in the LHCAccelerators and Storage RingsOperation of LHC with bunch trains at different spacings has revealed the formation of an electron cloud inside the machine. The main observations of electron cloud build up are the pressure rise measured at the vacuum gauges in the warm regions, as well as the increase of the beam screen temperature in the cold regions due to an additional heat load. The effects of the electron cloud were also visible as instability and emittance growth affecting the last bunches of longer trains, which could be improved running with higher chromaticity or larger transverse emittances. A summary of the 2010 and 2011 observations and measurements and a comparison with models will be presented. The efficiency of scrubbing to improve the machine running performance will be briefly discussed.CERN-ATS-2011-105oai:cds.cern.ch:13815322011-09-13
spellingShingle Accelerators and Storage Rings
Rumolo, G
Arduini, G
Baglin, V
Bartosik, H
Biancacci, N
Baudrenghien, P
Bregliozzi, G
Chiggiato, P
Claudet, S
De Maria, R
Esteban-Muller, J
Favier, M
Hansen, C
Höfle, W
Jimenez, J M
Kain, V
Lanza, G
Li, K S B
Maury Cuna, G H I
Métral, E
Papotti, G
Pieloni, T
Roncarolo, F
Salvant, B
Shaposhnikova, E N
Steinhagen, R J
Tavian, L J
Valuch, D
Venturini Delsolaro, W
Zimmermann, F
Iriso, U
Dominguez, O
Koukovini-Platia, E
Mounet, N
Zannini, C
Bhat, C M
Electron Cloud observation in the LHC
title Electron Cloud observation in the LHC
title_full Electron Cloud observation in the LHC
title_fullStr Electron Cloud observation in the LHC
title_full_unstemmed Electron Cloud observation in the LHC
title_short Electron Cloud observation in the LHC
title_sort electron cloud observation in the lhc
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1381532
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