Loss of Landau Damping in the LHC

Loss of Landau damping leading to a single bunch longitudinal instability has been observed in the LHC during the ramp and on the 3.5 TeV flat top for small injected longitudinal emittances. The first measurements are in reasonable agreement with the threshold calculated for the expected longitudina...

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Detalles Bibliográficos
Autores principales: Shaposhnikova, E N, Argyropoulos, T, Bohl, T, Bhat, C M, Baudrenghien, P, Butterworth, A C, Mastoridis, T, Esteban Muller, J, Papotti, G, Tuckmantel, J, Venturini Delsolaro, W, Wehrle, U
Lenguaje:eng
Publicado: 2011
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1378465
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author Shaposhnikova, E N
Argyropoulos, T
Bohl, T
Bhat, C M
Baudrenghien, P
Butterworth, A C
Mastoridis, T
Esteban Muller, J
Papotti, G
Tuckmantel, J
Venturini Delsolaro, W
Wehrle, U
author_facet Shaposhnikova, E N
Argyropoulos, T
Bohl, T
Bhat, C M
Baudrenghien, P
Butterworth, A C
Mastoridis, T
Esteban Muller, J
Papotti, G
Tuckmantel, J
Venturini Delsolaro, W
Wehrle, U
author_sort Shaposhnikova, E N
collection CERN
description Loss of Landau damping leading to a single bunch longitudinal instability has been observed in the LHC during the ramp and on the 3.5 TeV flat top for small injected longitudinal emittances. The first measurements are in reasonable agreement with the threshold calculated for the expected longitudinal reactive impedance budget of the LHC as well as with the threshold dependence on beam energy. The cure is a controlled longitudinal emittance blow-up during the ramp which for a constant threshold through the cycle should provide an emittance proportional to the square root of energy.
id cern-1378465
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13784652022-08-17T13:27:26Zhttp://cds.cern.ch/record/1378465engShaposhnikova, E NArgyropoulos, TBohl, TBhat, C MBaudrenghien, PButterworth, A CMastoridis, TEsteban Muller, JPapotti, GTuckmantel, JVenturini Delsolaro, WWehrle, ULoss of Landau Damping in the LHCAccelerators and Storage RingsLoss of Landau damping leading to a single bunch longitudinal instability has been observed in the LHC during the ramp and on the 3.5 TeV flat top for small injected longitudinal emittances. The first measurements are in reasonable agreement with the threshold calculated for the expected longitudinal reactive impedance budget of the LHC as well as with the threshold dependence on beam energy. The cure is a controlled longitudinal emittance blow-up during the ramp which for a constant threshold through the cycle should provide an emittance proportional to the square root of energy.CERN-ATS-2011-035oai:cds.cern.ch:13784652011-08-30
spellingShingle Accelerators and Storage Rings
Shaposhnikova, E N
Argyropoulos, T
Bohl, T
Bhat, C M
Baudrenghien, P
Butterworth, A C
Mastoridis, T
Esteban Muller, J
Papotti, G
Tuckmantel, J
Venturini Delsolaro, W
Wehrle, U
Loss of Landau Damping in the LHC
title Loss of Landau Damping in the LHC
title_full Loss of Landau Damping in the LHC
title_fullStr Loss of Landau Damping in the LHC
title_full_unstemmed Loss of Landau Damping in the LHC
title_short Loss of Landau Damping in the LHC
title_sort loss of landau damping in the lhc
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1378465
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AT argyropoulost lossoflandaudampinginthelhc
AT bohlt lossoflandaudampinginthelhc
AT bhatcm lossoflandaudampinginthelhc
AT baudrenghienp lossoflandaudampinginthelhc
AT butterworthac lossoflandaudampinginthelhc
AT mastoridist lossoflandaudampinginthelhc
AT estebanmullerj lossoflandaudampinginthelhc
AT papottig lossoflandaudampinginthelhc
AT tuckmantelj lossoflandaudampinginthelhc
AT venturinidelsolarow lossoflandaudampinginthelhc
AT wehrleu lossoflandaudampinginthelhc

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