Vacuum Calculations for the LHC Experimental Beam Chambers

The vacuum stability is studied for the LHC experimental beam vacuum chambers of ALICE, ATLAS, and CMS. The present baseline design includes sputtered Non-Evaporable Getter (NEG) coating over the whole chamber inner surface providing distributed pumping and an antimultipactor coating. The data are p...

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Detalles Bibliográficos
Autores principales: Collins, I, Knaster, J R, Lepeule, P, Rossi, A, Veness, R J M
Lenguaje:eng
Publicado: 2001
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/514354
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author Collins, I
Knaster, J R
Lepeule, P
Rossi, A
Veness, R J M
author_facet Collins, I
Knaster, J R
Lepeule, P
Rossi, A
Veness, R J M
author_sort Collins, I
collection CERN
description The vacuum stability is studied for the LHC experimental beam vacuum chambers of ALICE, ATLAS, and CMS. The present baseline design includes sputtered Non-Evaporable Getter (NEG) coating over the whole chamber inner surface providing distributed pumping and an antimultipactor coating. The data are presented for the dominant gas species (H2, CH4, CO and CO2) in a baked system. It results that the distributed pumping is necessary for vacuum stability of CO. Lumped pumping with Sputter Ion Pumps (SIP) is also indispensable for the stability of CH4. The operational constraints with NEG technology are described.
id cern-514354
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
record_format invenio
spelling cern-5143542023-05-31T13:21:02Zhttp://cds.cern.ch/record/514354engCollins, IKnaster, J RLepeule, PRossi, AVeness, R J MVacuum Calculations for the LHC Experimental Beam ChambersAccelerators and Storage RingsThe vacuum stability is studied for the LHC experimental beam vacuum chambers of ALICE, ATLAS, and CMS. The present baseline design includes sputtered Non-Evaporable Getter (NEG) coating over the whole chamber inner surface providing distributed pumping and an antimultipactor coating. The data are presented for the dominant gas species (H2, CH4, CO and CO2) in a baked system. It results that the distributed pumping is necessary for vacuum stability of CO. Lumped pumping with Sputter Ion Pumps (SIP) is also indispensable for the stability of CH4. The operational constraints with NEG technology are described.LHC-Project-Report-492CERN-LHC-Project-Report-492oai:cds.cern.ch:5143542001-08-06
spellingShingle Accelerators and Storage Rings
Collins, I
Knaster, J R
Lepeule, P
Rossi, A
Veness, R J M
Vacuum Calculations for the LHC Experimental Beam Chambers
title Vacuum Calculations for the LHC Experimental Beam Chambers
title_full Vacuum Calculations for the LHC Experimental Beam Chambers
title_fullStr Vacuum Calculations for the LHC Experimental Beam Chambers
title_full_unstemmed Vacuum Calculations for the LHC Experimental Beam Chambers
title_short Vacuum Calculations for the LHC Experimental Beam Chambers
title_sort vacuum calculations for the lhc experimental beam chambers
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/514354
work_keys_str_mv AT collinsi vacuumcalculationsforthelhcexperimentalbeamchambers
AT knasterjr vacuumcalculationsforthelhcexperimentalbeamchambers
AT lepeulep vacuumcalculationsforthelhcexperimentalbeamchambers
AT rossia vacuumcalculationsforthelhcexperimentalbeamchambers
AT venessrjm vacuumcalculationsforthelhcexperimentalbeamchambers

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