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Evolution of beam losses after a power cut of the SR7 AC supply

Magnet failures in the LHC could lead to equipment damage if the energy stored in the accelerator was not discharged properly. The Machine Protection Systems (MPS) ensure this proper discharge and knowledge about the evolution of losses in case of failure is needed to evaluate the adequacy of the pr...

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Autor principal: GOMEZ ALONSO, A
Lenguaje:eng
Publicado: 2009
Materias:
Acceso en línea:http://cds.cern.ch/record/1171225
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author GOMEZ ALONSO, A
author_facet GOMEZ ALONSO, A
author_sort GOMEZ ALONSO, A
collection CERN
description Magnet failures in the LHC could lead to equipment damage if the energy stored in the accelerator was not discharged properly. The Machine Protection Systems (MPS) ensure this proper discharge and knowledge about the evolution of losses in case of failure is needed to evaluate the adequacy of the protection. A power cut of the AC supply in SR7 would lead to a simultaneous current decay in three normal conducting circuits. The evolution of the losses after such failure is slow, with a loss time constant of more than 100 ms both at 450 GeV and 7 TeV, and in both cases the damage level is not reached before 45 ms. This leaves sufficient time for the MPS to ensure redundant protection. A similar scenario would be expected for a power cut at SR3.
id cern-1171225
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
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spelling cern-11712252019-09-30T06:29:59Zhttp://cds.cern.ch/record/1171225engGOMEZ ALONSO, AEvolution of beam losses after a power cut of the SR7 AC supplyAccelerators and Storage RingsMagnet failures in the LHC could lead to equipment damage if the energy stored in the accelerator was not discharged properly. The Machine Protection Systems (MPS) ensure this proper discharge and knowledge about the evolution of losses in case of failure is needed to evaluate the adequacy of the protection. A power cut of the AC supply in SR7 would lead to a simultaneous current decay in three normal conducting circuits. The evolution of the losses after such failure is slow, with a loss time constant of more than 100 ms both at 450 GeV and 7 TeV, and in both cases the damage level is not reached before 45 ms. This leaves sufficient time for the MPS to ensure redundant protection. A similar scenario would be expected for a power cut at SR3.LHC-Project-Note-420CERN-LHC-Project-Note-420oai:cds.cern.ch:11712252009-03-30
spellingShingle Accelerators and Storage Rings
GOMEZ ALONSO, A
Evolution of beam losses after a power cut of the SR7 AC supply
title Evolution of beam losses after a power cut of the SR7 AC supply
title_full Evolution of beam losses after a power cut of the SR7 AC supply
title_fullStr Evolution of beam losses after a power cut of the SR7 AC supply
title_full_unstemmed Evolution of beam losses after a power cut of the SR7 AC supply
title_short Evolution of beam losses after a power cut of the SR7 AC supply
title_sort evolution of beam losses after a power cut of the sr7 ac supply
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1171225
work_keys_str_mv AT gomezalonsoa evolutionofbeamlossesafterapowercutofthesr7acsupply