Conclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP Experiments

The Large Electron Positron Collider (LEP) has ended its last physics run in November 2000, and it is at present being dismantled to liberate the tunnel for the Large Hadron Collider (LHC) project to be completed by end of 2005. The cryogenic systems for the superconducting solenoid and focusing qua...

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Detalles Bibliográficos
Autores principales: Barth, K, Dauvergne, J P, Delikaris, D, Passardi, Giorgio
Lenguaje:eng
Publicado: 2001
Materias:
Accelerators and Storage Rings
Acceso en línea:https://dx.doi.org/10.1063/1.1472028
http://cds.cern.ch/record/526688
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author Barth, K
Dauvergne, J P
Delikaris, D
Passardi, Giorgio
author_facet Barth, K
Dauvergne, J P
Delikaris, D
Passardi, Giorgio
author_sort Barth, K
collection CERN
description The Large Electron Positron Collider (LEP) has ended its last physics run in November 2000, and it is at present being dismantled to liberate the tunnel for the Large Hadron Collider (LHC) project to be completed by end of 2005. The cryogenic systems for the superconducting solenoid and focusing quadrupoles for the two LEP experiments, ALEPH and DELPHI, each supplying a cooling power of 800 W/4.5 K entropy equivalent, have accumulated more then 100'000 hours of running time. The paper summarises the 12 years cryogenic experience in the various operating modes: cool-down, steady state, recovery after energy fast dump, utilities failures and warm-up of the superconducting magnets. The detailed operation statistics is presented and compared to the other CERN cryogenic systems. Emphasis is given to the technical analysis of the fault conditions and of their consequences on the helium refrigeration production time in view of the future operation of the LHC cryogenics.
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publishDate 2001
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spelling cern-5266882023-05-31T14:19:15Zdoi:10.1063/1.1472028http://cds.cern.ch/record/526688engBarth, KDauvergne, J PDelikaris, DPassardi, GiorgioConclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP ExperimentsAccelerators and Storage RingsThe Large Electron Positron Collider (LEP) has ended its last physics run in November 2000, and it is at present being dismantled to liberate the tunnel for the Large Hadron Collider (LHC) project to be completed by end of 2005. The cryogenic systems for the superconducting solenoid and focusing quadrupoles for the two LEP experiments, ALEPH and DELPHI, each supplying a cooling power of 800 W/4.5 K entropy equivalent, have accumulated more then 100'000 hours of running time. The paper summarises the 12 years cryogenic experience in the various operating modes: cool-down, steady state, recovery after energy fast dump, utilities failures and warm-up of the superconducting magnets. The detailed operation statistics is presented and compared to the other CERN cryogenic systems. Emphasis is given to the technical analysis of the fault conditions and of their consequences on the helium refrigeration production time in view of the future operation of the LHC cryogenics.CERN-LHC-2001-007-ECRoai:cds.cern.ch:5266882001-10-30
spellingShingle Accelerators and Storage Rings
Barth, K
Dauvergne, J P
Delikaris, D
Passardi, Giorgio
Conclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP Experiments
title Conclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP Experiments
title_full Conclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP Experiments
title_fullStr Conclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP Experiments
title_full_unstemmed Conclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP Experiments
title_short Conclusions from 12 Years Operational Experience of the Cryoplants for the Superconducting Magnets of the LEP Experiments
title_sort conclusions from 12 years operational experience of the cryoplants for the superconducting magnets of the lep experiments
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1063/1.1472028
http://cds.cern.ch/record/526688
work_keys_str_mv AT barthk conclusionsfrom12yearsoperationalexperienceofthecryoplantsforthesuperconductingmagnetsofthelepexperiments
AT dauvergnejp conclusionsfrom12yearsoperationalexperienceofthecryoplantsforthesuperconductingmagnetsofthelepexperiments
AT delikarisd conclusionsfrom12yearsoperationalexperienceofthecryoplantsforthesuperconductingmagnetsofthelepexperiments
AT passardigiorgio conclusionsfrom12yearsoperationalexperienceofthecryoplantsforthesuperconductingmagnetsofthelepexperiments

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