315840 SzGeCERN 20230531152124.0 oai:cds.cern.ch:315840 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN SLAC 3468305 SPIRES 3468305 Inspire 426803 LHC-Project-Report-81 eng CERN-LHC-Project-Report-81 Brunet, J C Ultra-high vacuum seals operating under pressure and at 1.8 K 1996 Geneva CERN 22 Oct 1996 4 p paper The Large Hadron Collider (LHC) project will be the next major high energy physics facility at CERN. Superconducting magnets operating at a magnetic field of 8.4 Tesla in a superfluid helium bath at 1.8 K are required to guide the high energy beams of protons on their trajectory. As part of the magnet qualification tests, magnetic measurements are made using a special device where demountable seals are required. The seals must be leak tight to vacuum and must be able to resist for short periods to pressure bursts up to 20 bar during resistive transitions (quench). Two types of seals have been qualified. Maximum leak rates were in the range 6.10-10 to 1.10-9 mbar.l.s-1, in the worst conditions (20 bar, superfluid helium at 1.8 K). SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT PREPRINT CERN LHC Not applicable Jacquemod, A LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-PROJECT-REPORT-81 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=LHC-PROJECT-REPORT-81 Access to fulltext document http://cds.cern.ch/record/315840/files/lhc-project-report-81.pdf Access to fulltext document http://cds.cern.ch/record/315840/files/lhc-project-report-81.ps.gz Access to fulltext document CERN n 199649 11 20100723 1335 CER01 19961128 315764 mandelieu960917 PUBLIC 0001 000238638CER PREPRINT ConferencePaper