MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam

Instabilities were being routinely observed in B1V during ADJUST. The timing of the instabilities has been localised to shortly after the TOTEM bump has been implemented. The result is emittance blowup which can negatively effect the luminosity output of the fill. This MD aimed to rule out possible...

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Detalles Bibliográficos
Autores principales: Carver, Lee Robert, Amorim, David, Biancacci, Nicolo, Buffat, Xavier, Iadarola, Giovanni, Lasocha, Kacper, Li, Kevin Shing Bruce, Levens, Tom, Metral, Elias, Salvant, Benoit, Tambasco, Claudia
Lenguaje:eng
Publicado: 2017
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/2253233
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author Carver, Lee Robert
Amorim, David
Biancacci, Nicolo
Buffat, Xavier
Iadarola, Giovanni
Lasocha, Kacper
Li, Kevin Shing Bruce
Levens, Tom
Metral, Elias
Salvant, Benoit
Tambasco, Claudia
author_facet Carver, Lee Robert
Amorim, David
Biancacci, Nicolo
Buffat, Xavier
Iadarola, Giovanni
Lasocha, Kacper
Li, Kevin Shing Bruce
Levens, Tom
Metral, Elias
Salvant, Benoit
Tambasco, Claudia
author_sort Carver, Lee Robert
collection CERN
description Instabilities were being routinely observed in B1V during ADJUST. The timing of the instabilities has been localised to shortly after the TOTEM bump has been implemented. The result is emittance blowup which can negatively effect the luminosity output of the fill. This MD aimed to rule out possible sources of the instability (i.e. beam-beam effects or electron cloud) by only taking one single beam to 6.5TeV and going through the full machine cycle. After the implementation of the TOTEM bump, a reduction of the octupole current was performed in order to determine if there was a discrepancy in the threshold between simulations and measurement. As a precursor, the results of the End of Fill MD: Validation of Single Bunch Stability Threshold will also be described.
id cern-2253233
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
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spelling cern-22532332019-09-30T06:29:59Zhttp://cds.cern.ch/record/2253233engCarver, Lee RobertAmorim, DavidBiancacci, NicoloBuffat, XavierIadarola, GiovanniLasocha, KacperLi, Kevin Shing BruceLevens, TomMetral, EliasSalvant, BenoitTambasco, ClaudiaMD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single BeamAccelerators and Storage RingsInstabilities were being routinely observed in B1V during ADJUST. The timing of the instabilities has been localised to shortly after the TOTEM bump has been implemented. The result is emittance blowup which can negatively effect the luminosity output of the fill. This MD aimed to rule out possible sources of the instability (i.e. beam-beam effects or electron cloud) by only taking one single beam to 6.5TeV and going through the full machine cycle. After the implementation of the TOTEM bump, a reduction of the octupole current was performed in order to determine if there was a discrepancy in the threshold between simulations and measurement. As a precursor, the results of the End of Fill MD: Validation of Single Bunch Stability Threshold will also be described.CERN-ACC-NOTE-2017-0013oai:cds.cern.ch:22532332017-02-21
spellingShingle Accelerators and Storage Rings
Carver, Lee Robert
Amorim, David
Biancacci, Nicolo
Buffat, Xavier
Iadarola, Giovanni
Lasocha, Kacper
Li, Kevin Shing Bruce
Levens, Tom
Metral, Elias
Salvant, Benoit
Tambasco, Claudia
MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam
title MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam
title_full MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam
title_fullStr MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam
title_full_unstemmed MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam
title_short MD1228: Validation of Single Bunch Stability Threshold & MD1751: Instability Studies with a Single Beam
title_sort md1228: validation of single bunch stability threshold & md1751: instability studies with a single beam
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/2253233
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