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Beam Loss Monitoring for Run 2 of the LHC

The Beam Loss Monitoring (BLM) system of the LHC consists of over 3600 ionization chambers. The main task of the system is to prevent the superconducting magnets from quenching and protect the machine components from damage, as a result of critical beam losses. The BLM system therefore requests a be...

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Autores principales: Kalliokoski, Matti, Auchmann, Bernhard, Dehning, Bernd, Domingues Sousa, Fernando, Effinger, Ewald, Emery, Jonathan, Grishin, Viatcheslav, Holzer, Eva Barbara, Jackson, Stephen, Kolad, Blazej, Nebot Del Busto, Eduardo, Picha, Ondrej, Roderick, Chris, Sapinski, Mariusz, Sobieszek, Marcin, Zamantzas, Christos
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:http://cds.cern.ch/record/2141806
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author Kalliokoski, Matti
Auchmann, Bernhard
Dehning, Bernd
Domingues Sousa, Fernando
Effinger, Ewald
Emery, Jonathan
Grishin, Viatcheslav
Holzer, Eva Barbara
Jackson, Stephen
Kolad, Blazej
Nebot Del Busto, Eduardo
Picha, Ondrej
Roderick, Chris
Sapinski, Mariusz
Sobieszek, Marcin
Zamantzas, Christos
author_facet Kalliokoski, Matti
Auchmann, Bernhard
Dehning, Bernd
Domingues Sousa, Fernando
Effinger, Ewald
Emery, Jonathan
Grishin, Viatcheslav
Holzer, Eva Barbara
Jackson, Stephen
Kolad, Blazej
Nebot Del Busto, Eduardo
Picha, Ondrej
Roderick, Chris
Sapinski, Mariusz
Sobieszek, Marcin
Zamantzas, Christos
author_sort Kalliokoski, Matti
collection CERN
description The Beam Loss Monitoring (BLM) system of the LHC consists of over 3600 ionization chambers. The main task of the system is to prevent the superconducting magnets from quenching and protect the machine components from damage, as a result of critical beam losses. The BLM system therefore requests a beam abort when the measured dose in the chambers exceeds a threshold value. During Long Shutdown 1 (LS1) a series of modifications were made to the system. Based on the experience from Run 1 and from improved simulation models, all the threshold settings were revised, and modified where required. This was done to improve the machine safety at 7 TeV, and to reduce beam abort requests when neither a magnet quench or damage to machine components is expected. In addition to the updates of the threshold values, about 800 monitors were relocated. This improves the response to unforeseen beam losses in the millisecond time scale due to micron size dust particles present in the vacuum chamber. This contribution will discuss all the changes made to the BLM system, with the reasoning behind them.
id oai-inspirehep.net-1417475
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
record_format invenio
spelling oai-inspirehep.net-14174752022-08-10T13:03:33Zhttp://cds.cern.ch/record/2141806engKalliokoski, MattiAuchmann, BernhardDehning, BerndDomingues Sousa, FernandoEffinger, EwaldEmery, JonathanGrishin, ViatcheslavHolzer, Eva BarbaraJackson, StephenKolad, BlazejNebot Del Busto, EduardoPicha, OndrejRoderick, ChrisSapinski, MariuszSobieszek, MarcinZamantzas, ChristosBeam Loss Monitoring for Run 2 of the LHCAccelerators and Storage RingsThe Beam Loss Monitoring (BLM) system of the LHC consists of over 3600 ionization chambers. The main task of the system is to prevent the superconducting magnets from quenching and protect the machine components from damage, as a result of critical beam losses. The BLM system therefore requests a beam abort when the measured dose in the chambers exceeds a threshold value. During Long Shutdown 1 (LS1) a series of modifications were made to the system. Based on the experience from Run 1 and from improved simulation models, all the threshold settings were revised, and modified where required. This was done to improve the machine safety at 7 TeV, and to reduce beam abort requests when neither a magnet quench or damage to machine components is expected. In addition to the updates of the threshold values, about 800 monitors were relocated. This improves the response to unforeseen beam losses in the millisecond time scale due to micron size dust particles present in the vacuum chamber. This contribution will discuss all the changes made to the BLM system, with the reasoning behind them.CERN-ACC-2015-308oai:inspirehep.net:14174752015
spellingShingle Accelerators and Storage Rings
Kalliokoski, Matti
Auchmann, Bernhard
Dehning, Bernd
Domingues Sousa, Fernando
Effinger, Ewald
Emery, Jonathan
Grishin, Viatcheslav
Holzer, Eva Barbara
Jackson, Stephen
Kolad, Blazej
Nebot Del Busto, Eduardo
Picha, Ondrej
Roderick, Chris
Sapinski, Mariusz
Sobieszek, Marcin
Zamantzas, Christos
Beam Loss Monitoring for Run 2 of the LHC
title Beam Loss Monitoring for Run 2 of the LHC
title_full Beam Loss Monitoring for Run 2 of the LHC
title_fullStr Beam Loss Monitoring for Run 2 of the LHC
title_full_unstemmed Beam Loss Monitoring for Run 2 of the LHC
title_short Beam Loss Monitoring for Run 2 of the LHC
title_sort beam loss monitoring for run 2 of the lhc
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/2141806
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