628650 SzGeCERN 20230531152338.0 oai:cds.cern.ch:628650 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1654 SPIRES 5636272 Inspire 625746 LHC-Project-Report-657 eng CERN-LHC-Project-Report-657 Dahlerup-Petersen, K Transmission Line Analysis of the Superconducting Quadrupole Chains of the LHC Collider at CERN 2003 Geneva CERN 9 Jul 2003 5 p Key information for determination of fundamental design features of magnet powering and protection circuits can be retrieved from the results of transmission line calculations of the superconducting magnet chains in a particle accelerator. Modelling and simulation of the behaviour of long magnet strings provide important data for the expected electrical behaviour and performances under all operating conditions. The presented results of a transmission line study concerns the sixteen superconducting main quadrupole chains QF/QD of CERN's future LHC collider. The paper details the elaboration of the synthesized electrical model of the individual quadrupoles and the associated lumped transmission line. It presents results on the current ripple for a given converter voltage output characteristics, the magnet excitation, leakage and earth currents during the ramping procedure, the impedance resonance spectrum and the need for individual magnet damping and the propagation, reflection, superposition and damping of the voltage waves generated during activation of the energy extraction switches. CERN EDS 20030716SLAC SIS INSP2004 E200412-8063664 (Compendex) SIS:2004 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable INSPEC Colliding-beam-accelerators INSPEC Magnet-excitation INSPEC quadrupole-chains INSPEC Superconducting-magnets INSPEC Electric-converters INSPEC Electric-potential; Leakage-currents INSPEC Damping INSPEC Electric-switches INSPEC Electromagnetic-wave- propagation INSPEC Electromagnetic-wave-reflection INSPEC Transfer-functions; Computer-simulation INSPEC 932-1-1, 708-3, 708-4, 704-2, 701-1, 931-1 Bourgeois, F LHC http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2003-657 Access to fulltext document http://cds.cern.ch/record/628650/files/lhc-project-report-657.pdf Access to fulltext document http://cds.cern.ch/record/628650/files/lhc-project-report-657.ps.gz Access to fulltext document CERN n 200329 a2004 13 20100901 1606 CER01 20030715 626826 1047-1050 dallas20030615 PUBLIC 002386600CER ARTICLE ConferencePaper