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Compensation of Beam Induced Effects in LHC Cryogenic Systems

This paper presents the different control strategies deployed in the LHC cryogenic system in order to compensate the beam induced effects in real-time. LHC beam is inducing important heat loads along the 27 km of beam screens due to synchrotron radiations, image current and electron clouds. These dy...

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Detalles Bibliográficos
Autores principales: Bradu, Benjamin, Blanco Viñuela, Enrique, Ferlin, Gerard, Fernández Adiego, Borja, Iadarola, Giovanni, Plutecki, Przemyslaw, Rogez, Edouard, Tovar González, Antonio
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2016-TUPMB048
http://cds.cern.ch/record/2207343
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author Bradu, Benjamin
Blanco Viñuela, Enrique
Ferlin, Gerard
Fernández Adiego, Borja
Iadarola, Giovanni
Plutecki, Przemyslaw
Rogez, Edouard
Tovar González, Antonio
author_facet Bradu, Benjamin
Blanco Viñuela, Enrique
Ferlin, Gerard
Fernández Adiego, Borja
Iadarola, Giovanni
Plutecki, Przemyslaw
Rogez, Edouard
Tovar González, Antonio
author_sort Bradu, Benjamin
collection CERN
description This paper presents the different control strategies deployed in the LHC cryogenic system in order to compensate the beam induced effects in real-time. LHC beam is inducing important heat loads along the 27 km of beam screens due to synchrotron radiations, image current and electron clouds. These dynamic heat loads disturb significantly the cryogenic plants and automatic compensations are mandatory to operate the LHC at full energy. The LHC beam screens must be maintained in an acceptable temperature range around 20 K to ensure a good beam vacuum, especially during beam injections and energy ramping where the dynamic responses of cryogenic systems cannot be managed with conventional feedback control techniques. Consequently, several control strategies such as feed-forward compensation have been developed and deployed successfully on the machine during 2015 where the beam induced heat loads are forecast in real-time to anticipate their future effects on cryogenic systems. All these developments have been first entirely modeled and simulated dynamically to be validated, allowing then a smooth deployment during the LHC operation.
id oai-inspirehep.net-1469843
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling oai-inspirehep.net-14698432022-08-10T12:37:26Zdoi:10.18429/JACoW-IPAC2016-TUPMB048http://cds.cern.ch/record/2207343engBradu, BenjaminBlanco Viñuela, EnriqueFerlin, GerardFernández Adiego, BorjaIadarola, GiovanniPlutecki, PrzemyslawRogez, EdouardTovar González, AntonioCompensation of Beam Induced Effects in LHC Cryogenic SystemsAccelerators and Storage RingsThis paper presents the different control strategies deployed in the LHC cryogenic system in order to compensate the beam induced effects in real-time. LHC beam is inducing important heat loads along the 27 km of beam screens due to synchrotron radiations, image current and electron clouds. These dynamic heat loads disturb significantly the cryogenic plants and automatic compensations are mandatory to operate the LHC at full energy. The LHC beam screens must be maintained in an acceptable temperature range around 20 K to ensure a good beam vacuum, especially during beam injections and energy ramping where the dynamic responses of cryogenic systems cannot be managed with conventional feedback control techniques. Consequently, several control strategies such as feed-forward compensation have been developed and deployed successfully on the machine during 2015 where the beam induced heat loads are forecast in real-time to anticipate their future effects on cryogenic systems. All these developments have been first entirely modeled and simulated dynamically to be validated, allowing then a smooth deployment during the LHC operation.CERN-ACC-2016-282oai:inspirehep.net:14698432016
spellingShingle Accelerators and Storage Rings
Bradu, Benjamin
Blanco Viñuela, Enrique
Ferlin, Gerard
Fernández Adiego, Borja
Iadarola, Giovanni
Plutecki, Przemyslaw
Rogez, Edouard
Tovar González, Antonio
Compensation of Beam Induced Effects in LHC Cryogenic Systems
title Compensation of Beam Induced Effects in LHC Cryogenic Systems
title_full Compensation of Beam Induced Effects in LHC Cryogenic Systems
title_fullStr Compensation of Beam Induced Effects in LHC Cryogenic Systems
title_full_unstemmed Compensation of Beam Induced Effects in LHC Cryogenic Systems
title_short Compensation of Beam Induced Effects in LHC Cryogenic Systems
title_sort compensation of beam induced effects in lhc cryogenic systems
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2016-TUPMB048
http://cds.cern.ch/record/2207343
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AT pluteckiprzemyslaw compensationofbeaminducedeffectsinlhccryogenicsystems
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