493324 SzGeCERN 20230531152432.0 oai:cds.cern.ch:493324 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN 10.1016/S0011-2275(01)00016-9 DOI CERN annual report 2001-3.1220 INSPEC 6920103 SPIRES 4610784 Inspire 555511 LHC-Project-Report-468 eng CERN-LHC-Project-Report-468 Chorowski, M Modelling of Helium-mediated Quench Propagation in the LHC Prototype Test String-1 2000 Geneva CERN 23 Mar 2001 16 p paper The Large Hadron Collider (LHC) prototype test string-1, hereafter referred to as the string, is composed of three ten-meter long prototype dipole magnets and one six-meter long prototype quadrupole magnet. The magnets are immersed in a pressurized static bath of superfluid helium that is maintained at a pressure of about 1 bar and at a temperature of about 1.9 K. This helium bath constitutes one single hydraulic unit, extending along the 42.5 m of the string length. We have measured the triggering of quenches of the string magnets due to the quenching of a single dipole magnet located at the string's extremity; i.e. "quench propagation". Previously reported measurements enabled to establish that in this configuration the quench propagation is mediated by the helium and not by the inter-magnet busbar connections [1], [2]. We present a model of helium mediated quench propagation based on the qualitative conclusions of these two previous papers, and on additional information gained from a dedicated series of quench propagation measurements that were not previously reported. We will discuss the specific mechanisms and their main parameters involved at different time scales of the propagation process, and apply the model to make quantitative predictions. 20010405SLAC CERN EDS SIS INSP2001 6920103 SIS:2001 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable INSPEC A2920D (Storage rings) INSPEC B7410 (Particle accelerators) INSPEC B3240E (Superconducting coils and magnets) INSPEC CI He el INSPEC accelerator-magnets INSPEC colliding-beam-accelerators INSPEC proton-accelerators INSPEC storage-rings INSPEC superconducting-magnets INSPEC superfluid-helium-4 Grzegory, P Serio, L Van Weelderen, R LHC 585-92 Cryogenics 40 2000 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-468 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhc-project-report-468 Access to fulltext document http://cds.cern.ch/record/493324/files/lhc-project-report-468.pdf Access to fulltext document http://cds.cern.ch/record/493324/files/lhc-project-report-468.ps.gz Access to fulltext document Evelyne.Delucinge@cern.ch CERN Univ. Technol. Wroclaw n 200114 a2001 13 20100728 1107 CER01 20010402 PUBLIC 0001 002247807CER ARTICLE 483939 SzGeCERN 20230531152145.0 oai:cds.cern.ch:483939 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN 10.1016/S0011-2275(01)00015-7 DOI CERCER 2237716 INSPEC 6920093 CERN annual report 2001-3.1204 SPIRES 4564480 Inspire 552890 LHC-Project-Report-459 eng CERN-LHC-Project-Report-459 Sanfilippo, S Methods for the Evaluation of Quench Temperature Profiles and their Application for LHC Superconducting Short Dipole Magnets 2000 Geneva CERN 19 Jan 2001 25 p paper This paper presents a study of the thermal effects on quench performance for several Large Hadron Collider single aperture short dipole models. The analysis is based on the temperature profile in a superconducting magnet evaluated after a quench. Peak temperatures and temperature gradients in the magnet coil are estimated for different thicknesses of insulation layer between the quench heaters and the coil and different powering and protection parameters. The results show clear correlation between the thermo-mechanical response of the magnet and quench performance. They also display that the optimisation of the position of quench heaters can reduce the decrease of training performance caused by the coexistence of a mechanical weak region and of a local temperature rise. 20010123SLAC CERN EDS SIS INSP2001 6920093 SIS:2001 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable INSPEC B3240E (Superconducting coils and magnets) INSPEC quenching-thermal INSPEC superconducting-magnets Siemko, A LHC 577-84 Cryogenics 40 2000 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-459 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhc-project-report-459 Access to fulltext document http://cds.cern.ch/record/483939/files/lhc-project-report-459.pdf Access to fulltext document http://cds.cern.ch/record/483939/files/lhc-project-report-459.ps.gz Access to fulltext document Evelyne.Delucinge@cern.ch CERN n 200104 a2001 13 20100729 1035 CER01 20010119 PUBLIC 0001 002237716CER ARTICLE 483494 SzGeCERN 20230531152037.0 oai:cds.cern.ch:483494 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN 10.1016/S0011-2275(01)00019-4 DOI CERN annual report 2001-3.0719 INSPEC 6920096 SPIRES 4564472 Inspire 540216 LHC-Project-Report-456 eng CERN-LHC-Project-Report-456 Bottura, L A General Model for Thermal, Hydraulic and Electric Analysis of Superconducting Cables 2000 Geneva CERN 22 Dec 2000 28 p paper In this paper we describe a generic, multi-component and multi-channel model for the analysis of superconducting cables. The aim of the model is to treat in a general and consistent manner simultaneous thermal, electric and hydraulic transients in cables. The model is devised for most general situations, but reduces in limiting cases to most common approximations without loss of efficiency. We discuss here the governing equations, and we write them in a matrix form that is well adapted to numerical treatment. We finally demonstrate the model capability by comparison with published experimental data on current distribution in a two-strand cable. 20010123SLAC CERN EDS SIS INSP2001 6920096 SIS:2001 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable INSPEC B8130D (Superconducting power cables) INSPEC B3240Y (Other superconducting devices and material applications) INSPEC B0290Z (Other numerical methods) INSPEC numerical-analysis INSPEC superconducting-cables INSPEC transients Breschi, M Rosso, C LHC 617-26 Cryogenics 40 2000 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-456 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhc-project-report-456 Access to fulltext document http://cds.cern.ch/record/483494/files/lhc-project-report-456.pdf Access to fulltext document http://cds.cern.ch/record/483494/files/lhc-project-report-456.ps.gz Access to fulltext document Evelyne.Delucinge@cern.ch CERN CryoSoft, France Univ. Bologna n 200104 a2001 13 20100728 1107 CER01 20010116 PUBLIC 0001 002237267CER ARTICLE