Observations of Instabilities in the LHC Due to Missing Head-On Beam-Beam Interactions

We report the observation of coherent instabilities on individual bunches out of the LHC bunch train. These instabilities occurred spontaneously after several hours of stable beam while in the other cases they were related to the application of a small transverse beam separation during a luminosity...

Descripción completa

Detalles Bibliográficos
Autores principales: Arduini, G, Giachino, R, Herr, W, Metral, E, Papotti, G, Pieloni, T, Buffat, X, Mounet, N
Lenguaje:eng
Publicado: 2013
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/1581726
_version_ 1780931093922316288
author Arduini, G
Giachino, R
Herr, W
Metral, E
Papotti, G
Pieloni, T
Buffat, X
Mounet, N
author_facet Arduini, G
Giachino, R
Herr, W
Metral, E
Papotti, G
Pieloni, T
Buffat, X
Mounet, N
author_sort Arduini, G
collection CERN
description We report the observation of coherent instabilities on individual bunches out of the LHC bunch train. These instabilities occurred spontaneously after several hours of stable beam while in the other cases they were related to the application of a small transverse beam separation during a luminosity optimization. Only few bunches were affected, depending on their collision schemes and following various tests we interpret these instabilities as a sudden loss of Landau damping when the tune spread from the beam-beam interaction becomes insufficient.
id cern-1581726
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15817262019-09-30T06:29:59Zhttp://cds.cern.ch/record/1581726engArduini, GGiachino, RHerr, WMetral, EPapotti, GPieloni, TBuffat, XMounet, NObservations of Instabilities in the LHC Due to Missing Head-On Beam-Beam InteractionsAccelerators and Storage RingsWe report the observation of coherent instabilities on individual bunches out of the LHC bunch train. These instabilities occurred spontaneously after several hours of stable beam while in the other cases they were related to the application of a small transverse beam separation during a luminosity optimization. Only few bunches were affected, depending on their collision schemes and following various tests we interpret these instabilities as a sudden loss of Landau damping when the tune spread from the beam-beam interaction becomes insufficient.CERN-ACC-2013-0139oai:cds.cern.ch:15817262013-05-12
spellingShingle Accelerators and Storage Rings
Arduini, G
Giachino, R
Herr, W
Metral, E
Papotti, G
Pieloni, T
Buffat, X
Mounet, N
Observations of Instabilities in the LHC Due to Missing Head-On Beam-Beam Interactions
title Observations of Instabilities in the LHC Due to Missing Head-On Beam-Beam Interactions
title_full Observations of Instabilities in the LHC Due to Missing Head-On Beam-Beam Interactions
title_fullStr Observations of Instabilities in the LHC Due to Missing Head-On Beam-Beam Interactions
title_full_unstemmed Observations of Instabilities in the LHC Due to Missing Head-On Beam-Beam Interactions
title_short Observations of Instabilities in the LHC Due to Missing Head-On Beam-Beam Interactions
title_sort observations of instabilities in the lhc due to missing head-on beam-beam interactions
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1581726
work_keys_str_mv AT arduinig observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions
AT giachinor observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions
AT herrw observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions
AT metrale observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions
AT papottig observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions
AT pielonit observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions
AT buffatx observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions
AT mounetn observationsofinstabilitiesinthelhcduetomissingheadonbeambeaminteractions

Ejemplares similares