630342 SzGeCERN 20240223160809.0 oai:cds.cern.ch:630342 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1159 SPIRES 5636310 Inspire 625750 LHC-Project-Report-661 eng CERN-LHC-Project-Report-661 Burgmer, R Performance of the First LHC Main Quadrupoles Made in Industry 2003 Geneva CERN 15 Jul 2003 4 p paper After the creation of a new dedicated factory and a period of technology transfer, ACCEL Instruments has constructed and delivered the first LHC main quadrupole magnets to CERN. The design of these magnets had been the subject of a close collaboration between CEA-Saclay and CERN. Thus, CEA ensures also the technology follow-up for the fabrication of 400 quadrupole magnets and their cold masses. The two quadrupoles delivered to CERN were bare magnets, i.e. magnets not integrated into their cold masses. The purpose was to verify their performance before fabricating full cold masses. The two magnets were tested at 1.9 K in a vertical cryostat at CERN. For both magnets the current could be ramped up to well above their nominal level before a quench occurred. The second powering provoked on one of the magnets a quench at the ultimate level of excitation and in the other magnet no quench, even after the ultimate current value had been well exceeded. The field quality measurements, as far as possible in the vertical cryostat, confirmed the multipole content already found during the warm field measurements made in the factory. CC-BY publication JACoW CERN EDS 20030729SLAC SIS PAC03-2004 SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Durante, M Klein, H Krischel, D Peyrot, M Rifflet, J M Schellong, B Schirm, K M Schmidt, P Simon, F AUTHOR|(CDS)2079513 #BEARD# Stephani, T Tortschanoff, Theodor Venturini-Delsolaro, W LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-661 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2003-661 Access to fulltext document https://accelconf.web.cern.ch/p03/PAPERS/WPAE007.pdf Published version from JACoW http://cds.cern.ch/record/630342/files/lhc-project-report-661.pdf Access to fulltext document http://cds.cern.ch/record/630342/files/lhc-project-report-661.ps.gz Access to fulltext document CERN ACCEL Instruments GmbH, Bergisch-Gladbach, Germany CEA-Saclay, France n 200331 a2004 13 20100901 1606 CER01 20030728 526325 1948 portland20030512 PUBLIC 002387974CER ARTICLE ConferencePaper 0001 630343 SzGeCERN 20240223160809.0 oai:cds.cern.ch:630343 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0729 SPIRES 5636329 Inspire 625751 LHC-Project-Report-662 eng CERN-LHC-Project-Report-662 Vanenkov, I Influence of Azimuthal Coil Size on Skew Multipoles in the LHC Dipoles 2003 Geneva CERN 15 Jul 2003 4 p paper The field quality in superconducting accelerator magnets is strongly influenced by the azimuthal dimension of the superconducting coil. Asymmetries between the upper and lower poles steer skew harmonics that can endanger the beam dynamics stability. We present dimensional measurements of a large number of coils that have been carried out in one of the three manufacturers of the main LHC dipoles. A magneto-static model is then used to work out the influence of coil non-nominalites on field harmonics. Comparison to magnetic measurements carried out at room temperature shows that skew harmonics can be partly traced back to azimuthal coil dimensions. We focus on harmonics, which are more critical with respect to the beam dynamics limits (a2 and a4). Finally some strategies are presented, like the sorting of individual coil poles in order to reduce the detrimental effects on these multipoles. CC-BY publication JACoW CERN EDS SIS PAC03-2004 SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Völlinger, C LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-662 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2003-662 Access to fulltext document https://accelconf.web.cern.ch/p03/PAPERS/WPAE008.pdf Published version from JACoW http://cds.cern.ch/record/630343/files/lhc-project-report-662.pdf Access to fulltext document http://cds.cern.ch/record/630343/files/lhc-project-report-662.ps.gz Access to fulltext document CERN n 200331 a2004 13 20100901 1606 CER01 20030728 526325 1951 portland20030512 PUBLIC 002387976CER ARTICLE ConferencePaper 0001 630341 SzGeCERN 20240223160809.0 oai:cds.cern.ch:630341 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0825 SPIRES 5636302 Inspire 625749 LHC-Project-Report-660 eng CERN-LHC-Project-Report-660 Rossi, L The LHC Superconducting Magnets 2003 Geneva CERN 15 Jul 2003 6 p paper The Large Hadron Collider (LHC) is under construction at CERN. Most of its 27 km underground tunnel will be filled with superconducting magnets, mainly 15 m long dipoles and 3 m long quadrupoles. The 1232 main dipole and 392 main quadrupole magnets, are complemented by a number of insertion quadrupole magnets: including 86 MQM (matching), 26 MQY (wide aperture) and 32 low-beta quadrupoles (the latter built by KEK and Fermilab). The about 6000 superconducting corrector magnets, many of them individually powered, are also very critical for the functioning of the accelerator. Using copper stabilized NbTi Rutherford cables or single strands, these superconducting magnets will operate in superfluid helium at 1.9 K. The paper reviews the main characteristics of these magnets and addresses the critical points of the design with respect to their use in such a complicated accelerator like LHC. Then the status of the production of the superconducting cable and of the magnets is given, with particular emphasis given to the QA/QC procedures taken to ensure the industrial production according to the tight requirements, and the results on the first 30 main dipoles is presented. Finally, the plan put in place to meet the LHC schedule is discussed. CC-BY publication JACoW CERN EDS 20030729SLAC SIS PAC03-2004 SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2003-660 Access to fulltext document https://accelconf.web.cern.ch/p03/PAPERS/TOAB001.pdf Published version from JACoW http://cds.cern.ch/record/630341/files/lhc-project-report-660.pdf Access to fulltext document http://cds.cern.ch/record/630341/files/lhc-project-report-660.ps.gz Access to fulltext document lucio.rossi@cern.ch CERN n 200331 a2004 13 20100901 1606 CER01 20030728 526325 141 portland20030512 PUBLIC 002387836CER ARTICLE ConferencePaper 0001 630340 SzGeCERN 20240223160809.0 oai:cds.cern.ch:630340 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0296 SPIRES 5636299 Inspire 625748 LHC-Project-Report-659 eng CERN-LHC-Project-Report-659 Scandale, Walter AUTHOR|(CDS)2107593 #BEARD# Controlling Field Quality in Magnet Production 2003 Geneva CERN 15 Jul 2003 4 p paper The field quality measurements at room temperature of around 100 collared coils of the main LHC dipoles are analysed. Using correlations to field measurements at 1.9 K, comparison with beam dynamics limits are discussed. Both random and systematic components are analysed, allowing to pin out the most critical multipoles. Corrective actions that have been taken during the pre-series phase are presented; we focus on the low order systematic multipoles that are shown to be the most difficult components to steer. A preliminary analysis of the integrated main field and of its implications on the possible scenarios for the installation are also carried out. CERN EDS 20030729SLAC SIS INSP2004 7952647 SIS:2004 PR/LKR added SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings INSPEC 1 INSPEC LHC dipoles INSPEC controlling field quality INSPEC low order systematic multipoles INSPEC magnet production ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable INSPEC A2925F (Beam handling, focusing, pulsing, stripping and diagnostics) INSPEC B7410B (Particle beam handling and diagnostics) INSPEC B3240E (Superconducting coils and magnets) INSPEC NI temperature: 1 INSPEC accelerator-magnets INSPEC proton-accelerators INSPEC superconducting-magnets Bottura, L Devred, Arnaud Remondino, Vittorio Sanfilippo, S Todesco, Ezio AUTHOR|(CDS)2108516 #BEARD# Völlinger, C Wildner, E LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-659 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2003-659 Access to fulltext document https://accelconf.web.cern.ch/p03/PAPERS/TOAB009.PDF Published version http://cds.cern.ch/record/630340/files/lhc-project-report-659.pdf Access to fulltext document http://cds.cern.ch/record/630340/files/lhc-project-report-659.ps.gz Access to fulltext document CERN n 200331 a2004 13 20100901 1606 CER01 20030728 526325 173 portland20030512 PUBLIC 002387835CER ARTICLE ConferencePaper 0001 630339 SzGeCERN 20240223160809.0 oai:cds.cern.ch:630339 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1506 SPIRES 5636280 Inspire 625747 LHC-Project-Report-658 eng CERN-LHC-Project-Report-658 Modena, M Status of the LHC Main Dipole Pre-Series Production 2003 Geneva CERN 15 Jul 2003 4 p paper The procurement of a pre-series of 90 main dipoles was decided as the first step towards the series production of 1232 arc main dipoles within the LHC magnet program. The pre-series production is already completed at one contractor's site and is approaching the completion at the other two companies. Technical aspects: manufacturing tolerances, manufacturing difficulties, first evaluation on non-conformities appearing during production and a short overview of magnet performance are presented. CC-BY publication JACoW 20030729SLAC CERN EDS SIS PAC03-2004 SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Bajko, M Cornelis, M Fessia, P Miles, J Pugnat, P Rinn, J de Rijk, G Savary, F Siemko, A Todesco, Ezio AUTHOR|(CDS)2108516 #BEARD# Vlogaert, J LHC CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-658 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2003-658 Access to fulltext document https://accelconf.web.cern.ch/p03/PAPERS/WPAE005.pdf Published version from JACoW http://cds.cern.ch/record/630339/files/lhc-project-report-658.pdf Access to fulltext document http://cds.cern.ch/record/630339/files/lhc-project-report-658.ps.gz Access to fulltext document CERN n 200331 a2004 13 20100901 1606 CER01 20030728 526325 1942 portland20030512 PUBLIC 002387834CER ARTICLE ConferencePaper 0001