517566 SzGeCERN 20230531152333.0 oai:cds.cern.ch:517566 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERCER 2273559 CERN annual report 2002-3.0595 SPIRES 4736060 Inspire 563467 LHC-Project-Report-496 eng CERN-LHC-Project-Report-496 Dahlerup-Petersen, K Energy Extraction in the CERN Large Hadron Collider a Project Overview 2001 Geneva CERN 27 Aug 2001 4 p paper In case of a resistive transition (quench), fast and reliable extraction of the magnetic energy, stored in the superconducting coils of the electromagnets of a particle collider, represents an important part of its magnet protection system. In general, the quench detectors, the quench heaters and the cold by-pass diodes across each magnet, together with the energy extraction facilities provide the required protection of the quenching superconductors against damage due to local energy dissipation. In CERN's LHC machine the energy stored in each of its eight superconducting dipole chains exceeds 1300 MJ. Following an opening of the extraction switches this energy will be absorbed in large extraction resistors located in the underground collider tunnel or adjacent galleries, during the exponential current decay. Also the sixteen, 13 kA quadrupole chains (QF, QD) and more than one hundred and fifty, 600 A circuits of the corrector magnets will be equipped with extraction systems. The extraction switch-gear is based on specially designed, mechanical high-speed DC breakers, in certain cases combined with capacitive snubber circuits for arc suppression. This paper is an overview of the complete project with emphasis on the arguments and motivation for the choice of equipment and methods. It presents the basic properties of the principal components, the operational aspects and the present state of advancement. Finally, it highlights the implications of the extraction process on other systems of the LHC collider. 7402880 20010914SLAC CERN EDS SIS INSP2002 SIS:2002 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable INSPEC A2920L (Synchrotrons) INSPEC A2921 (Beams in particle accelerators) INSPEC B7410B (Particle beam handling and diagnostics) INSPEC B3240E (Superconducting coils and magnets) INSPEC B8370 (Switchgear) INSPEC B8360 (Power convertors and power supplies to apparatus) INSPEC NI current: 6 INSPEC accelerator-magnets INSPEC circuit-breakers INSPEC colliding-beam-accelerators INSPEC particle-beam-extraction INSPEC proton-accelerators INSPEC pulsed-power-supplies INSPEC snubbers INSPEC superconducting-coils INSPEC superconducting-magnets INSPEC switchgear INSPEC synchrotrons Erokhin, A Kazmine, B Medvedko, A S Sytchev, V V Vasilev, L B LHC CERN-Russia Collaboration CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-496 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhc-project-report-496 Access to fulltext document http://cds.cern.ch/record/517566/files/lhc-project-report-496.pdf Access to fulltext document http://cds.cern.ch/record/517566/files/lhc-project-report-496.ps.gz Access to fulltext document Evelyne.Delucinge@cern.ch CERN BINP, Novosibirsk, Russia IHEP, Protvino, Russia n 200137 a2002 13 20100901 1605 CER01 20010914 505713 1473-6 lasvegas20010617 PUBLIC 002273559CER ARTICLE ConferencePaper 0001 517567 0001 20051103 0845 CER01 20010914 002273560CER UNKNOWN DELETED