410572 SzGeCERN 20230531152407.0 oai:cds.cern.ch:410572 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN SPIRES 4265866 Inspire 511299 LHC-Project-Report-337 eng CERN-LHC-Project-Report-337 Ballarino, A High Temperature Superconducting Current Leads for the Large Hadron Collider rev. version 1999 Geneva CERN 1 Dec 1999 5 p paper The Large Hadron Collider (LHC) will be equipped with about 8000 superconducting magnets. Some 3380 leads will feed the currents ranging from 60 to 13000 A. To reduce the heat inleak into the liquid helium, CERN aims to use High Temperature Superconducting material for leads having current ratings between 600 and 13000 A. Specifications have been written for 13000 A current leads, incorporating a High Temperature Superconducting section, for the main magnets of the LHC, and contracts have been placed with several firms for the supply of prototypes for comparative testing. The leads used for feeding locally the 60 and 120 A dipole orbit correctors will be conventional conduction cooled resistive leads. An optimized lead of variable cross section has been tested, and an integral design has been initiated. This report describes the design status of the current leads for the LHC, emphasizing, for the different solutions, the principle of optimization and the choice of the cooling methods. CERN EDS 991208SLAC SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT PREPRINT CERN LHC Not applicable LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-337 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=LHC-Project-Report-337 Access to fulltext document http://cds.cern.ch/record/410572/files/lhc-project-report-337.pdf Access to fulltext document http://cds.cern.ch/record/410572/files/lhc-project-report-337.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 199949 11 20100728 1107 CER01 19991203 368724 sitges990914 PUBLIC 0001 000337827CER PREPRINT ConferencePaper 410571 SzGeCERN 20230531152236.0 oai:cds.cern.ch:410571 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2002-3.2144 INSPEC 7300084 SPIRES 4265874 Inspire 511300 LHC-Project-Report-336 eng CERN-LHC-Project-Report-336 Haverkamp, M Studies of Decay and Snapback Effects on LHC Dipole Magnets 2000 Geneva CERN 1 Dec 1999 5 p LHC model magnets have dynamic field imperfections of various nature. Two effects of particular importance are field component decay during injection and ''snapback'' during the first few seconds of acceleration, which happens over typically 15 to 20 mT. The dynamic behaviour of the model magnets was measured as a function of several parameters in the operation cycle and powering history. We demonstrate how the systematic variation of only one single operation cycle parameter can affect the behaviour of the sextupole component. 7300084 991207SLAC 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 A2921 (Beams in particle accelerators) INSPEC A2920L (Synchrotrons) INSPEC A2920D (Storage rings) INSPEC A4180G (Ion beams and ion optics) INSPEC A2910 (Preacceleration (injection)) INSPEC A0755 (Magnetic instruments and techniques) INSPEC A0240 (Geometry, differential geometry, and topology) INSPEC B7410B (Particle beam handling and diagnostics) INSPEC B5180F (Solenoids and electromagnets) INSPEC NI magnetic flux density: 1 INSPEC accelerator-magnets INSPEC electromagnets INSPEC geometry INSPEC ion-accelerators INSPEC ion-beams INSPEC particle-beam-injection INSPEC storage-rings INSPEC synchrotrons Bottura, L Schneider, M LHC http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=LHC-Project-Report-336 Access to fulltext document http://cds.cern.ch/record/410571/files/lhc-project-report-336.pdf Access to fulltext document http://cds.cern.ch/record/410571/files/lhc-project-report-336.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN Univ. Twente, Enschede n 199949 a2002 13 20100728 1107 CER01 19991203 368724 1183-1186 sitges990914 PUBLIC 000337826CER ARTICLE ConferencePaper 404144 SzGeCERN 20230531152159.0 oai:cds.cern.ch:404144 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN SPIRES 4235819 Inspire 509236 LHC-Project-Report-313 eng CERN-LHC-Project-Report-313 Anashin, V V Experimental Investigations of the Electron Cloud Key Parameters 1999 Geneva CERN 18 Oct 1999 8 p paper Motivated by a potential electron cloud instability and the possible existence of electron mulitpacting in the LHC vacuum system, that may result in additional gas desorption and unmanageable heat loads on the cryogenic system, an extensive experimental research program is underway at CERN to quantify the key parameters driving these phenomena. Parameters, such as: photoelectron yield, photon reflectivity, secondary electron yield etc. from industrially prepared surfaces have been quantified. In addition to their dependence on photon dose the effect of temperature and presence of external fields has also been studied. CERN EDS 991028SLAC SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT PREPRINT CERN LHC XX Baglin, V Cimino, R AUTHOR|(CDS)2084568 #BEARD# Collins, I R Dostovalov, R V Fedorov, N V Gómez-Goñi, J Gröbner, Oswald Henrist, Bernard Hilleret, Noël CERN Krasnov, A A Laurent, Jean Michel Malyshev, O B Pyata, E E Pivi, M LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-313 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=LHC-Project-Report-313 Access to fulltext document http://cds.cern.ch/record/404144/files/lhc-project-report-313.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN INFN, Trieste BINP, Novosibirsk n 199943 11 20100728 1106 CER01 19991019 476611 tsukuba990921 PUBLIC 0001 000330849CER PREPRINT ConferencePaper 404143 SzGeCERN 20230531151959.0 oai:cds.cern.ch:404143 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN SPIRES 4235827 Inspire 509237 LHC-Project-Report-312 eng CERN-LHC-Project-Report-312 Collins, I R Vacuum Stability for Ion Induced Gas Desorption 1999 Geneva CERN 18 Oct 1999 7 p paper Ion induced vacuum instability was first observed in the Intersecting Proton Storage Rings (ISR) at CERN and in spite of substantial vacuum improvements, it remained a limitation of the maximum beam current throughout the operation of the machine. Extensive laboratory studies and dedicated machine experiments were made during this period to understand the details of this effect and to identify ways of increasing the limit to higher beam currents. Stimulated by the recent design work for the LHC vacuum system, the interest in this problem has been revived with a new critical review of the parameters which determine the pressure run-away in a given vacuum system with high intensity beams. CERN EDS 991028SLAC SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings CERN LHCPROJECTREPORT PREPRINT CERN LHC Not applicable Gröbner, Oswald Malyshev, O B Rossi, A AUTHOR|(CDS)2070768 #BEARD# Strubin, Pierre M Veness, R J M LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-312 http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=LHC-Project-Report-312 Access to fulltext document http://cds.cern.ch/record/404143/files/lhc-project-report-312.pdf Access to fulltext document http://cds.cern.ch/record/404143/files/lhc-project-report-312.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 199943 11 20100728 1106 CER01 19991019 476611 tsukuba990921 PUBLIC 0001 000330848CER PREPRINT ConferencePaper