732330 SzGeCERN 20230531152304.0 DOI 10.1109/TASC.2004.829031 oai:cds.cern.ch:732330 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1564 Inspire 1370921 LHC-Project-Report-718 eng CERN-LHC-Project-Report-718 Rossi, L Superconducting magnets for the LHC main lattice 2004 Geneva CERN 2 Apr 2004 7 p paper The main lattice of the Large Hadron Collider (LHC) will employ about 1600 main magnets and more than 4000 corrector magnets. All superconducting and working in pressurized superfluid helium bath, these impressive line of magnets will fill more than 20 km of the underground tunnel. With almost 70 main dipoles already delivered and 10 main quadrupoles almost completed, we passed the 5% of the production and now all manufacturers have fully entered into series production. In this paper the most critical issues encountered in the ramping up in such a real large scale fabrication will be addressed: uniformity of the coil size and of prestress, special welding technique, tolerances on curvature (dipoles) or straightness (quadrupoles) and of the cold mass extremities, harmonic content and, most important, the integrated field uniformity among magnets. The actual limits and the solution for improvements will be discussed. Finally a realistic schedule based on actual achievements is presented. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable LHC 153-158 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-718 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-718 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002445025 IEEE Published version, local copy http://cds.cern.ch/record/732330/files/cer-002445025.pdf IEEE Published version, local copy http://cds.cern.ch/record/732330/files/lhc-project-report-718.pdf Fulltext http://cds.cern.ch/record/732330/files/lhc-project-report-718.ps.gz Fulltext evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 153-158 morioka20031020 PUBLIC 0001 002445025CER ARTICLE ConferencePaper 732327 SzGeCERN 20230531152310.0 DOI 10.1109/TASC.2004.829048 oai:cds.cern.ch:732327 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0533 Inspire 1370930 LHC-Project-Report-717 eng CERN-LHC-Project-Report-717 Kirby, G A Fabrication of the Pre-Series Wide Aperture Superconducting Quadrupoles for the LHC Insertions 2004 Geneva CERN 2 Apr 2004 5 p paper Individually powered superconducting quadrupoles with a coil bore of 70 mm will be installed in the LHC insertions, in areas where increased geometrical acceptance and improved field quality are required. The quadrupoles feature a four-layer coil, designed on the basis of two graded 8.3 mm wide Rutherford-type NbTi cables. The magnets have a magnetic length of 3.4 m and a nominal gradient of 160 T/m at 4.5 K and 3610 A. A total of 26 quadrupoles are in production at ACCEL Instruments (Germany). In this report we present the experience in fabrication of the pre-series magnets and the results of the initial qualification tests. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Catalan-Lasheras, N Ostojic, R Burgmer, R Jordan, M Krischel, D Schmidt, P LHC 207-210 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-717 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-717 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002445023 IEEE Published version, local copy http://cds.cern.ch/record/732327/files/cer-002445023.pdf IEEE Published version, local copy http://cds.cern.ch/record/732327/files/lhc-project-report-717.pdf Fulltext http://cds.cern.ch/record/732327/files/lhc-project-report-717.ps.gz Fulltext evelyne.delucinge@cern.ch CERN ACCEL Instruments, Bergisch Gladbach, Germany n 200419 a2004 13 20100401 2001 CER01 20040429 600810 207-210 morioka20031020 PUBLIC 0001 002445023CER ARTICLE ConferencePaper 732325 SzGeCERN 20230531152239.0 DOI 10.1109/TASC.2004.830871 oai:cds.cern.ch:732325 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0546 Inspire 1370997 LHC-Project-Report-716 eng CERN-LHC-Project-Report-716 Pieloni, T Field Decay and Snapback Measurements Using a Fast Hall Probe Sensor 2004 Geneva CERN 2 Apr 2004 5 p paper revised version submitted on 2004-05-03 09:12:41 During beam injection the components of the magnetic field inside the magnets decay in time. At the re-start of the ramping, this decay is cancelled resulting in a fast change of the harmonics called "snapback". This sudden variation affects mainly the sextupole and decapole components and can induce significant changes in the machine chromaticity, thus causing particle beam loss. Standard magnetic measurements with rotating coils do not have a sufficient time resolution to properly characterize the snapback phenomenon. A system based on Hall probes has been developed from an existing prototype to measure with a moderate acquisition frequency (3-10 Hz) the decay and snapback of the sextupole- and, for the first time, of the decapole fields. The present system also provides local measurements of these field harmonics along a wavelength of the superconducting cable twist pitch. In this paper, we describe the assembly features of this detector and of the measurement chain. The performances are demonstrated based on preliminary measurements performed on the LHC pre-series dipoles in operating conditions. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Sanfilippo, S Bottura, L Haverkamp, M Tikhov, A Effinger, E Benedico, E Smirnov, N LHC 1822-1825 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-716 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-716 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002445022 IEEE Published version, local copy http://cds.cern.ch/record/732325/files/cer-002445022.pdf IEEE Published version, local copy http://cds.cern.ch/record/732325/files/lhc-project-report-716.pdf Fulltext http://cds.cern.ch/record/732325/files/lhc-project-report-716.ps.gz Fulltext evelyne.delucinge@cern.ch Milano Univ. CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 1822-1825 morioka20031020 PUBLIC 0001 002445022CER ARTICLE ConferencePaper 732323 SzGeCERN 20230531152304.0 DOI 10.1109/TASC.2004.829063 oai:cds.cern.ch:732323 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1293 Inspire 1370938 LHC-Project-Report-715 eng CERN-LHC-Project-Report-715 Rodríguez-Mateos, F The Quench Protection System for the LHC Test String 2 2004 Geneva CERN 2 Apr 2004 5 p paper The Large Hadron Collider (LHC) String programme has focussed over the years the efforts of many teams that have tested and validated their systems under operating conditions close to the final ones in the LHC machine tunnel and underground areas. During the various phases while commissioning or performing dedicated experiments, the Quench Protection System (QPS) has been tested and improved. A large variety of designs of the QPS equipment have been validated. The experience gained, especially concerning both the commissioning and the interaction with systems working within close interfaces (interlocks, powering, controls), is a valuable expertise to undertake the LHC challenge. In the LHC, the QPS will be the only system monitoring and protecting the superconducting elements: the integrity of all the superconducting magnets, bus bars and high-Tc superconducting current leads will depend on its reliable operation. A description of the system installed in String 2 will be given together with the principal similarities and differences with respect to the equipment planned for installation in the LHC. The key experimental results will be explained. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Dahlerup-Petersen, K Denz, R Milani, D Tegenfeldt, F AT 251-254 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-715 http://doc.cern.ch/archive/electronic/cern/preprints/lhc/lhc-project-report-715.pdf Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444983 IEEE Published version, local copy http://cds.cern.ch/record/732323/files/cer-002444983.pdf IEEE Published version, local copy http://cds.cern.ch/record/732323/files/lhc-project-report-715.pdf Fulltext evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 251-254 morioka20031020 PUBLIC 0001 002444983CER ARTICLE ConferencePaper 732321 SzGeCERN 20230531152008.0 DOI 10.1109/TASC.2004.829690 oai:cds.cern.ch:732321 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1038 Inspire 1370957 LHC-Project-Report-714 eng CERN-LHC-Project-Report-714 Bidon, S Normal Conducting Separation Dipoles for the LHC Beam Cleaning Insertions 2004 Geneva CERN 2 Apr 2004 5 p paper In the Large Hadron Collider (LHC), two straight sections, IR3 and IR7, will be dedicated to beam cleaning. These cleaning insertions will be equipped with normal conducting magnets. MBW magnets are dipole magnets used to increase the separation of the two beams. They have a core length of 3.4 m and a gap height of 52 mm and will operate at a magnetic field ranging from 0.09 T to 1.53 T. Limitations on the dimensions and total weight of the magnet resulted in a special design with a common yoke for the two beams. The orbits of the two beams will be separated horizontally by a distance between 194 mm and 224 mm in the gap of the magnet. The magnet was designed in collaboration between CERN and BINP. The report presents the main design issues and results of the pre-series acceptance tests including mechanical, electrical and magnetic field measurements. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Gerard, D Hans, O Kalbreier, Willi Kiselev, O Petrov, V Protopopov, I V Pupkov, Yu A Ramberger, S de Rijk, G Ruvinsky, E Sukhanov, A LHC 437-440 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-714 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-714 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444982 IEEE Published version, local copy http://cds.cern.ch/record/732321/files/lhc-project-report-714.pdf Fulltext http://cds.cern.ch/record/732321/files/lhc-project-report-714.ps.gz Fulltext 177783 http://cds.cern.ch/record/732321/files/cer-002444982.pdf evelyne.delucinge@cern.ch CERN Budker Institute of Nuclear Physics, BINP, Novosibirsk, Russia n 200419 a2004 13 20100401 2001 CER01 20040429 600810 437-440 morioka20031020 PUBLIC 0001 002444982CER ARTICLE ConferencePaper 732319 SzGeCERN 20230531152303.0 DOI 10.1109/TASC.2004.829047 oai:cds.cern.ch:732319 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0358 Inspire 1370929 LHC-Project-Report-713 eng CERN-LHC-Project-Report-713 Ostojic, R Design and Assembly of the Pre-Series Quadrupoles for the LHC Insertions 2004 Geneva CERN 2 Apr 2004 5 p paper The LHC insertions are equipped with several different types of individually powered superconducting quadrupoles. These units comprise several quadrupole magnets and orbit correctors, and range in length from 5.3 m to 11.3 m. In spite of the variety of types and interface requirements, the design of the quadrupoles is based on the same principle where two welded half-shells provide the rigidity and alignment of the magnets and serve as a helium pressure vessel. In this paper we present the mechanical design of the LHC insertion quadrupoles, describe the initial experience in the assembly of the pre-series units, and report on the alignment measurements. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Lucas, J Kirby, G A Pérez, J C Prin, H LHC MT-18 203-206 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-713 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-713 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444980 IEEE Published version, local copy http://cds.cern.ch/record/732319/files/cer-002444980.pdf IEEE Published version, local copy http://cds.cern.ch/record/732319/files/lhc-project-report-713.pdf Fulltext http://cds.cern.ch/record/732319/files/lhc-project-report-713.ps.gz Fulltext evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 203-206 morioka20031020 PUBLIC 0001 002444980CER ARTICLE ConferencePaper 732318 SzGeCERN 20230531152303.0 DOI 10.1109/TASC.2004.829046 oai:cds.cern.ch:732318 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0283 Inspire 1370928 LHC-Project-Report-712 eng CERN-LHC-Project-Report-712 Ostojic, R Construction and Qualification of the Pre-Series MQM Superconducting Quadrupoles for the LHC Insertions 2004 Geneva CERN 2 Apr 2004 5 p paper The LHC insertions will be equipped with individually powered MQM superconducting quadrupoles, produced in three versions with magnetic lengths of 2.4 m, 3.4 m, and 4.8 m. The quadrupoles feature a 56 mm aperture coil, designed on the basis of an 8.8 mm wide Rutherford-type NbTi cable for a nominal gradient of 200 T/m at 1.9 K and 5390 A. A total of 96 quadrupoles are in production in Tesla Engineering, UK. In this report we describe the construction of the pre-series MQM quadrupoles and present the results of the qualification tests. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Catalan-Lasheras, N Lucas, J Venturini-Delsolaro, W Landgrebe, D LHC 199-202 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-712 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-712 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444979 IEEE Published version, local copy http://cds.cern.ch/record/732318/files/cer-002444979.pdf IEEE Published version, local copy http://cds.cern.ch/record/732318/files/lhc-project-report-712.pdf Fulltext http://cds.cern.ch/record/732318/files/lhc-project-report-712.ps.gz Fulltext evelyne.delucinge@cern.ch CERN ELYTT Energy, Portugalete, Spain Tesla Engineering, Storrington, UK n 200419 a2004 13 20100401 2001 CER01 20040429 600810 199-202 morioka20031020 PUBLIC 0001 002444979CER ARTICLE ConferencePaper 732317 SzGeCERN 20230531152233.0 DOI 10.1109/TASC.2004.829040 oai:cds.cern.ch:732317 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1563 Inspire 1370926 LHC-Project-Report-711 eng CERN-LHC-Project-Report-711 Ostojic, R Superconducting Magnets For LHC Insertions 2004 Geneva CERN 2 Apr 2004 7 p paper The LHC comprises eight insertions, four of which are dedicated to the experiments while the others are used for major collider systems. The various functions of the insertions are fulfilled by a variety of magnet systems, most of them based on the technology of NbTi superconductors cooled by superfluid helium at 1.9 K. In this paper, we review the concepts underlying the design of the LHC insertions, and describe the corresponding design of the various specialized magnet systems. A status of the procurement of the magnets is given, and plans for their installation and commissioning reviewed. CERN EDS E200437-8348808 (Compendex) SIS INSP2004 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 LHC 181-186 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-711 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-711 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444978 IEEE Published version, local copy http://cds.cern.ch/record/732317/files/cer-002444978.pdf IEEE Published version, local copy http://cds.cern.ch/record/732317/files/lhc-project-report-711.pdf Fulltext http://cds.cern.ch/record/732317/files/lhc-project-report-711.ps.gz Fulltext evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 181-186 morioka20031020 PUBLIC 0001 002444978CER ARTICLE ConferencePaper 732316 SzGeCERN 20230531152303.0 DOI 10.1109/TASC.2004.829045 oai:cds.cern.ch:732316 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1510 Inspire 1370927 LHC-Project-Report-710 eng CERN-LHC-Project-Report-710 Allitt, M Status of the Production of the LHC Superconducting Corrector Magnets 2004 Geneva CERN 2 Apr 2004 5 p paper The Large Hadron Collider (LHC) will be equipped with a large number (6400) of superconducting corrector magnets. These magnets are powerful, with typical peak fields of 3-4 T on the coils, but at the same time compact and of low cost. There are many types: sextupoles, octupoles and decapoles to correct the main dipole field, dipoles, quadrupoles, sextupoles and octupoles to condition the proton beams and several nested correctors from dipole to dodecapole in the inner triplets. The sizes vary from 6 kg, 110 mm long, nested decapole-octupole spool pieces to 1800 kg, 1.4m long, trim quadrupoles. The fabrication of the 11 different types of magnets is assured by 10 contracts placed at 6 firms, two of which are in India. A number of magnets are now in series production, others in their pre-series production. The paper describes the present state of the fabrication and the testing of these magnets. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Ijspeert, Albert Karppinen, M Mazet, J Wolf, R LHC 195-198 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-710 http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-710 Fulltext http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444976 IEEE Published version, local copy http://cds.cern.ch/record/732316/files/cer-002444976.pdf IEEE Published version, local copy http://cds.cern.ch/record/732316/files/lhc-project-report-710.pdf Fulltext http://cds.cern.ch/record/732316/files/lhc-project-report-710.ps.gz Fulltext evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 195-198 morioka20031020 PUBLIC 0001 002444976CER ARTICLE ConferencePaper 732315 SzGeCERN 20230531152231.0 DOI 10.1109/TASC.2004.829050 oai:cds.cern.ch:732315 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0820 Inspire 1370932 LHC-Project-Report-709 eng CERN-LHC-Project-Report-709 Bajko, M The LHC Pre-series Dipole Cold Mass Geometry 2004 Geneva CERN 2 Apr 2004 5 p paper In order to provide the necessary mechanical aperture for the LHC beam, the main dipole cold masses have to match precisely the nominal circular trajectory of the particles beam. The requirements on the dipole cold mass geometry are dictated by the LHC beam optics and by the allowed limits of mechanical deformation of the interconnection bellows. Keeping the tight tolerances that are imposed necessitates a well controlled bending process and the use of a high accuracy 3D measuring instrument for checking the geometry of the cold mass throughout many manufacturing stages up to the final inspection. The dipole cold mass pre-series production started in 2000. It is almost completed at the three sites. In this paper, we report on the problems encountered to shape correctly the cold masses, their effect on interconnection of the dipole cold masses and on the mechanical aperture. On one side measures to improve the production process in terms of accuracy and reproducibility were taken, on the other side the assembly tolerances could be relaxed following a thorough review of the machine requirements. The summary of the encountered problems, corrective actions and results obtained on the pre-series cold masses are presented and discussed. CERN EDS SIS INSP2004 E200437-8348816 (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 Chamizo, R Savary, F Skoczen, B Veness, R J M Jeanneret, J B LHC 215-218 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-709 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444975 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-709 Access to fulltext document http://cds.cern.ch/record/732315/files/cer-002444975.pdf IEEE Published version, local copy http://cds.cern.ch/record/732315/files/lhc-project-report-709.pdf Access to fulltext document http://cds.cern.ch/record/732315/files/lhc-project-report-709.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 215-218 morioka20031020 PUBLIC 0001 002444975CER ARTICLE ConferencePaper 732314 SzGeCERN 20230531152303.0 DOI 10.1109/TASC.2004.829049 oai:cds.cern.ch:732314 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0353 Inspire 1370931 LHC-Project-Report-708 eng CERN-LHC-Project-Report-708 La China, M Deformations and Displacements of the LHC Superconducting Dipoles Induced by Standard and Non-Standard Operational Modes 2004 Geneva CERN 2 Apr 2004 5 p paper A full-scale and fully-instrumented working model of the LHC lattice cell has been tested at CERN between March and December 2002. Aside of the current, pressure and temperature sensors, controlled by an industrial supervision system, a novel device has been set to monitor magnet positions with respect to the surrounding cryostat. The series of operating modes to test cryogenics, current leads and quench recovery electronics offered the chance to investigate potentially harmful deformations of the superconducting structure. In this paper we present a survey of displacements and deformations experienced by the LHC cell magnets during thermal cycles, current ramps and resistive transitions. Although the system complexity prevented from complete modeling, a preliminary phenomena explanation is given. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable García-Pérez, J Gubello, G Scandale, Walter AUTHOR|(CDS)2107593 #BEARD# LHC 211-214 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-708 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444974 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-708 Access to fulltext document http://cds.cern.ch/record/732314/files/cer-002444974.pdf IEEE Published version, local copy http://cds.cern.ch/record/732314/files/lhc-project-report-708.pdf Access to fulltext document http://cds.cern.ch/record/732314/files/lhc-project-report-708.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 211-214 morioka20031020 PUBLIC 0001 002444974CER ARTICLE ConferencePaper 732312 SzGeCERN 20230531152302.0 DOI 10.1109/TASC.2004.829034 oai:cds.cern.ch:732312 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1292 Inspire 1368956 LHC-Project-Report-707 eng CERN-LHC-Project-Report-707 Siemko, A CERN Quench Performance and Field Quality of the LHC Preseries Superconducting Dipoles 2004 Geneva CERN 2 Apr 2004 5 p paper The preseries production of the LHC main superconducting dipoles is presently being tested at CERN. The foremost features of these magnets are: twin structure, six block two layer coils wound from 15.1 mm wide graded NbTi cables, 56 mm aperture, polyimide insulation and stainless steel collars. This paper reviews the main test results of magnets tested to day in both normal and superfluid helium. The results of the training performance, magnet protection, electrical integrity and the field quality are presented in terms of the specifications and expected performance of these magnets in the future accelerator. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Berrig, O E CERN Bottura, L CERN Buzio, M CERN Chohan, V CERN Le Floc'h, E CERN Granata, V CERN Pojer, M CERN Pugnat, P CERN Rossi, L CERN Sanfilippo, S CERN Smirnov, N CERN Vlogaert, J CERN Walckiers, L CERN LHC 165-168 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-707 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444971 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-707 Access to fulltext document http://cds.cern.ch/record/732312/files/cer-002444971.pdf IEEE Published version, local copy http://cds.cern.ch/record/732312/files/lhc-project-report-707.pdf Access to fulltext document http://cds.cern.ch/record/732312/files/lhc-project-report-707.ps.gz Access to fulltext document http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1324762 server evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 165-168 morioka20031020 PUBLIC 0001 002444971CER ARTICLE ConferencePaper 732311 SzGeCERN 20230531152302.0 DOI 10.1109/TASC.2004.829060 oai:cds.cern.ch:732311 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1352 Inspire 1370937 LHC-Project-Report-706 eng CERN-LHC-Project-Report-706 Smirnov, N Results of Magnetic Axis Measurements on a Prototype Main Lattice Quadrupole for the LHC 2004 Geneva CERN 2 Apr 2004 5 p paper More than 470 twin aperture lattice quadrupoles are needed for the Large Hadron Collider (LHC) under construction at CERN. The lattice quadrupole, assembled with correction magnets in its helium enclosure - the cold mass and integrated in a common cryostat called the Short Straight Section (SSS). All SSS cold mass prototypes have been developed and built by CEA (Saclay) in collaboration with CNRS (Orsay, France). The last SSS prototype (SSS5) was used to investigate the behavior of the magnetic axis through various steps of the installation cycle for the series quadrupoles: including transportation, thermal-cycles, and being lowered into the tunnel. Results of extensive measurements before and after each of these stages are presented here, showing that the effect of transport is weak and within the window of measurement resolution. Also shown is that the long-term stability observed during two years is comparable with the requirements from magnet tolerances. To minimize systematic errors, all tests were performed with two independent measurement systems: Single-Stretched Wire (SSW) and Automated Scanner. A brief description of these systems is given, concentrating mostly on their accuracies. In addition, establishment of a reliable cold - warm correlation for the magnetic axis position is a very important issue because it can reduce the percentage of cold tests. Though this correlation will be based on proper statistics at the beginning of series production, magnetic axis behavior during thermal-cycle has been investigated for the SSS5 prototype, and these results are also presented. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Buzio, M Deferne, G Parma, V Rohmig, P Tortschanoff, Theodor LHC 243-246 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-706 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444970 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-706 Access to fulltext document http://cds.cern.ch/record/732311/files/cer-002444970.pdf IEEE Published version, local copy http://cds.cern.ch/record/732311/files/lhc-project-report-706.pdf Access to fulltext document http://cds.cern.ch/record/732311/files/lhc-project-report-706.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 243-246 morioka20031020 PUBLIC 0001 002444970CER ARTICLE ConferencePaper 732310 SzGeCERN 20230531152302.0 DOI 10.1109/TASC.2004.829052 oai:cds.cern.ch:732310 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0303 Inspire 1370933 LHC-Project-Report-705 eng CERN-LHC-Project-Report-705 Bellesia, B Correlations between Field Quality and Geometry of Components in the Collared Coils of the LHC Main Dipoles 2004 Geneva CERN 2 Apr 2004 5 p paper The Large Hadron Collider (LHC) [1], a proton-proton superconducting accelerator, will consist of about 8400 superconducting magnet units, all operating in superfluid helium at a temperature of 1.9 K. The design of the superconducting main dipole magnets for the LHC is guided by the requirement of an extremely high field quality in the magnet aperture which is mainly defined by the layout of the superconducting coil and the position of the conductors. In order to avoid conductor movements within the magnet cross-section, the superconducting coils are held in place by surrounding stainless steel collars. In this paper, we review the dependence of field harmonics in the LHC main dipoles on dimensions of the hardware components of the collared coils. An analysis of the dimensional measurements of these compo-nents which are used in the collared coils produced so far is given. Sensitivity tables which are worked out through a coupled magneto-static model give the variation of the multipoles on collars, copper wedge dimensions and cable geometry. A Monte Carlo method is used to simulate the effects of possible errors on the multipoles. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Remondino, Vittorio Scandale, Walter AUTHOR|(CDS)2107593 #BEARD# Todesco, Ezio AUTHOR|(CDS)2108516 #BEARD# Völlinger, C LHC 219-222 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-705 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444969 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-705 Access to fulltext document http://cds.cern.ch/record/732310/files/cer-002444969.pdf IEEE Published version, local copy http://cds.cern.ch/record/732310/files/lhc-project-report-705.pdf Access to fulltext document http://cds.cern.ch/record/732310/files/lhc-project-report-705.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 219-222 morioka20031020 PUBLIC 0001 002444969CER ARTICLE ConferencePaper 732306 SzGeCERN 20230531152302.0 DOI 10.1109/TASC.2004.829039 oai:cds.cern.ch:732306 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1516 Inspire 1370925 LHC-Project-Report-704 eng CERN-LHC-Project-Report-704 Todesco, Ezio AUTHOR|(CDS)2108516 #BEARD# Steering field quality in the main dipole magnets of the Large Hadron Collider 2004 Geneva CERN 2 Apr 2004 5 p paper More than 10% of the collared coils of the main LHC dipoles have been produced. In this paper we compare the measured field quality to beam dynamics targets using correlations to measurements at 1.9 K. The present status of field quality is given and corrective actions carried out to center field quality on optimal values are presented. Differences among the three manufacturers are analysed, and the main results that concern correlation between cold and warm measurements are outlined. Present trends in the production and open points are discussed. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Bellesia, B Bottura, L Devred, Arnaud Remondino, Vittorio Pauletta, S Sanfilippo, S Scandale, Walter AUTHOR|(CDS)2107593 #BEARD# Völlinger, C Wildner, E LHC 177-180 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-704 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444968 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-704 Access to fulltext document http://cds.cern.ch/record/732306/files/cer-002444968.pdf IEEE Published version, local copy http://cds.cern.ch/record/732306/files/lhc-project-report-704.pdf Access to fulltext document http://cds.cern.ch/record/732306/files/lhc-project-report-704.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 177-180 morioka20031020 PUBLIC 0001 002444968CER ARTICLE ConferencePaper 732304 SzGeCERN 20230531152302.0 DOI 10.1109/TASC.2004.829037 oai:cds.cern.ch:732304 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1246 Inspire 1370924 LHC-Project-Report-703 eng CERN-LHC-Project-Report-703 Wildner, E Production Follow-Up of the LHC Main Dipoles through Magnetic Measurements at Room Temperature 2004 Geneva CERN 2 Apr 2004 5 p paper In this paper we review the tools used for controlling the production of the LHC main dipoles through warm magnetic measurements. For the collared coil measurements, control limits are based on the statistics relative to the pre-series production. For the cold mass, the difference between collared coil and cold mass is considered, allowing a very stringent test. In both cases, measurements are split in straight part average, variations and coil ends contributions. Two different alarm levels exist in case the measured field is out of limits. The analysis can be carried out at the manufacturer and allows detection of anomalies in the measured magnetic field. These can be either due to wrong measurements or caused by assembly defects. Techniques used to work out information on the magnet assembly from the field harmonics are outlined. We summarize the experience gathered on about 180 collared coils and 120 cold masses, pointing out the bad cases and investigating the reliability of the measurements. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Pauletta, S Remondino, Vittorio Scandale, Walter AUTHOR|(CDS)2107593 #BEARD# Todesco, Ezio AUTHOR|(CDS)2108516 #BEARD# Völlinger, C LHC 173-176 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-703 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444967 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-703 Access to fulltext document http://cds.cern.ch/record/732304/files/cer-002444967.pdf IEEE Published version, local copy http://cds.cern.ch/record/732304/files/lhc-project-report-703.pdf Access to fulltext document http://cds.cern.ch/record/732304/files/lhc-project-report-703.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 173-176 morioka20031020 PUBLIC 0001 002444967CER ARTICLE ConferencePaper 732302 SzGeCERN 20230531152301.0 DOI 10.1109/TASC.2004.830514 oai:cds.cern.ch:732302 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1335 Inspire 1370993 LHC-Project-Report-702 eng CERN-LHC-Project-Report-702 Fessia, P Reliability of the longitudinal welds of LHC main dipoles 2004 Geneva CERN 2 Apr 2004 5 p paper The LHC main dipoles are assembled relying heavily on welding technology. In particular, two 15 m long longitudinal MAG welds along the shrinking cylinder, manufactured from AISI 316 LN stainless steel plates, close the cold mass and are submitted to tensile stress. The welds have to feature a design load of 350 MPa at 1.8 K and to guarantee the leak tightness to superfluid helium. Starting from few available experimental data, the reliability of the cold mass welds in terms of fracture mechanics is studied under different hypotheses (i. e. presence of surface or embedded flaws). The analysis has been carried out using a wide range of different approaches, such as Leak before break, LCF (Low Cycle Fatigue), LEFM (Linear Elastic Fracture Mechanics) and established standards (WES 2805). Also different approaches of propagation under fatigue are compared. The results of this study are meant to prove the robustness and reliability of the design at the working temperature of the magnets. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Lanza, C Sgobba, Stefano AUTHOR|(CDS)2067275 #BEARD# LHC MT-18 1185-1188 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-702 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444966 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-702 Access to fulltext document http://cds.cern.ch/record/732302/files/cer-002444966.pdf IEEE Published version, local copy http://cds.cern.ch/record/732302/files/lhc-project-report-702.pdf Access to fulltext document http://cds.cern.ch/record/732302/files/lhc-project-report-702.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 1185-1188 morioka20031020 PUBLIC 0001 002444966CER ARTICLE ConferencePaper 732297 SzGeCERN 20230531152300.0 DOI 10.1109/TASC.2004.829055 oai:cds.cern.ch:732297 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1439 Inspire 1370936 LHC-Project-Report-701 eng CERN-LHC-Project-Report-701 Gubello, G Shape analysis of the LHC Pre-series Dipoles 2004 Geneva CERN 2 Apr 2004 5 p paper This paper presents the results of a comprehensive analysis, from the geometric point of view, of the pre-series LHC dipoles. The progressive change of the imposed magnet shape has been monitored from the first assembly stage until after the cold test. Data concerning the error on sagitta, extremity positions and sextupolar corrector positions are provided for the pre-series magnets. Implications of aligning out-of-tolerance dipoles by the extremities are also discussed. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable La China, M Scandale, Walter AUTHOR|(CDS)2107593 #BEARD# LHC 231-234 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-701 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444963 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-701 Access to fulltext document http://cds.cern.ch/record/732297/files/cer-002444963.pdf IEEE Published version, local copy http://cds.cern.ch/record/732297/files/lhc-project-report-701.pdf Access to fulltext document http://cds.cern.ch/record/732297/files/lhc-project-report-701.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 231-234 morioka20031020 PUBLIC 0001 002444963CER ARTICLE ConferencePaper 732296 SzGeCERN 20230531152118.0 DOI 10.1109/TASC.2004.829054 oai:cds.cern.ch:732296 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.0865 Inspire 1370935 LHC-Project-Report-700 eng CERN-LHC-Project-Report-700 Bottura, L Magnetic Alignment Measurements at Room and Cryogenic Temperature of LHC Cryodipoles and Associated Correctors at CERN 2004 Geneva CERN 2 Apr 2004 4 p paper Considerable effort is spent at CERN on magnetic alignment measurements of main lattice LHC dipoles, including field direction, curved axis shape and position of in-built correctors, essential to verify the geometry of the assembly and to guarantee correct installation w.r.t. the reference beam orbit. The current baseline includes measurements of a statistically relevant percentage of cold masses and cryostated magnets before, during and after cryogenic tests. For this, we use a range of scanning probes based either on harmonic coils or fixed coils in AC mode, with laser and telescope trackers to measure position w.r.t. cryostat fiducials. The dipole is usually powered in "quadrupole mode" to create a convenient magnetic reference. In this paper, we first recall objectives, equipment and methods. Then, we report the status of the test activities, showing results obtained on the first pre-series dipoles, including cross-checks of various measurement systems and correlation between measurements at room and cryogenic temperatures. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Buzio, M Coccoli, M Deferne, G García-Pérez, J Smirnov, N LHC 227-230 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-700 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444962 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-700 Access to fulltext document http://cds.cern.ch/record/732296/files/cer-002444962.pdf IEEE Published version, local copy http://cds.cern.ch/record/732296/files/lhc-project-report-700.pdf Access to fulltext document http://cds.cern.ch/record/732296/files/lhc-project-report-700.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200419 a2004 13 20100401 2001 CER01 20040429 600810 227-230 morioka20031020 PUBLIC 0001 002444962CER ARTICLE ConferencePaper 732070 SzGeCERN 20230531152232.0 oai:cds.cern.ch:732070 cerncds:FULLTEXT cerncds:CERN:FULLTEXT INIS cerncds:CERN CERN annual report 2004-3.1490 SPIRES 5868610 Inspire 649782 LHC-Project-Report-699 eng CERN-LHC-Project-Report-699 Calvi, M AUTHOR|(CDS)2072924 #BEARD# Statistical Analysis of Conductor Motion in LHC Superconducting Dipole Magnets 2004 Geneva CERN 2 Apr 2004 5 p paper Premature training quenches are usually caused by the transient energy release within the magnet coil as it is energised. The dominant disturbances originate in cable motion and produce observable rapid variation in voltage signals called spikes. The experimental set up and the raw data treatment to detect these phenomena are briefly recalled. The statistical properties of different features of spikes are presented like for instance the maximal amplitude, the energy, the duration and the time correlation between events. The parameterisation of the mechanical activity of magnets is addressed. The mechanical activity of full-scale prototype and first preseries LHC dipole magnets is analysed and correlations with magnet manufacturing procedures and quench performance are established. The predictability of the quench occurrence is discussed and examples presented. CERN EDS SIS ARC-PR-2007 CLAS1 LHC-PROJECT-REPORT SzGeCERN Accelerators and Storage Rings ARTICLE CERN LHCPROJECTREPORT CERN LHC Not applicable Ponomarev, N Pugnat, P Siemko, A LHC 223-226 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-LHC-Project-Report-699 http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002444827 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=lhcproj-2004-699 Access to fulltext document http://cds.cern.ch/record/732070/files/cer-002444827.pdf IEEE Published version, local copy http://cds.cern.ch/record/732070/files/lhc-project-report-699.pdf Access to fulltext document http://cds.cern.ch/record/732070/files/lhc-project-report-699.ps.gz Access to fulltext document evelyne.delucinge@cern.ch CERN n 200418 a2004 13 20100901 1606 CER01 20040428 600810 223-226 morioka20031020 PUBLIC 002444827CER ARTICLE ConferencePaper 0001 732337 SzGeCERN 20180427131742.0 DOI 10.1109/TASC.2004.830342 oai:cds.cern.ch:732337 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN CERN annual report 2004-3.0530 Inspire 1370989 CERN-AT-2004-012-MTM eng Coccoli, M Fabrication and performance of Nb$_{3}$Sn Rutherford-type cable with Cu added as a separate component 2004 Geneva CERN 28 Apr 2004 5 p paper From the standpoint of overall conductor cost, it is desirable to minimize the amount of Cu that is co-processed with the superconductor during strand fabrication. We are investigating several approaches for fabricating multistrand cables in which the Cu is added at the final, i.e. cabling, stage of manufacture. These include mixed strand Rutherford-type cables with pure Cu strands cabled together with superconductor strands that have a low volume fraction of Cu, Cu added as a core to a Rutherford-type cable, and Cu strip added to the surface of the cable. Results on fabrication of several alternate types of Nb$_{3}$Sn cables are presented. The more promising types of mixed strand and cored cables are being evaluated in short sample and small magnet tests. These results will be presented and the performance will be compared with conventional Rutherford cables where the Cu is an integral component of the superconductor strand. CERN EDS UNCL SzGeCERN Accelerators and Storage Rings ARTICLE CERN Scanlan, R M Calvi, M AUTHOR|(CDS)2072924 #BEARD# Caspi, S Chiesa, L Hafalia, R R Higley, H C Dietderich, D R Gourlay, S A Lietzke, A F McInturff, A D Sabbi, G L AT 971-974 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-012-MTM http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002445027 IEEE Published version, local copy http://cds.cern.ch/record/732337/files/cer-002445027.pdf IEEE Published version, local copy evelyne.delucinge@cern.ch CERN Lawrence Berkeley National Laboratory, Berkeley, USA n 200420 a2004 13 20071204 1347 CER01 20040429 600810 971-974 morioka20031020 PUBLIC 0001 002445027CER ARTICLE ConferencePaper 732336 SzGeCERN 20161219134206.0 DOI 10.1109/TASC.2004.829985 oai:cds.cern.ch:732336 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN CERN annual report 2004-3.1279 Inspire 1370988 CERN-AT-2004-011-MTM eng Cornuet, D QTG quadrupole magnets for the CNGS transfer line 2004 Geneva CERN 28 Apr 2004 5 p paper The QTG quadrupole magnets will be a part of the CERN Neutrino to Gran Sasso (CNGS) transfer line. 23 QTG magnets will be used as lattice and matching quadrupoles. They are being produced in the framework of a German in-kind contribution via DESY to CNGS. The QTG magnets have a maximum gradient of 40 T/m at the 530 A excitation current and are manufactured from laminated steel cores. The yoke length is 2.2 m and the inscribed radius is 22.5 mm. The excitation coils are made of vacuum impregnated hollow copper conductor. The main design aspects and the results of the acceptance tests including mechanical, electrical and magnetic field measurements are described. CERN EDS UNCL SzGeCERN Accelerators and Storage Rings ARTICLE CERN Kiselev, O Levichev, E B Pavlov, O Pupkov, Yu A Ruvinsky, E Zickler, T AT 600-603 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-011-MTM http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002445026 IEEE Published version, local copy http://cds.cern.ch/record/732336/files/cer-002445026.pdf IEEE Published version, local copy evelyne.delucinge@cern.ch CERN Budker Institute of Nuclear Physics (BINP), Novosibirsk, Russia n 200420 a2004 13 20071204 1348 CER01 20040429 600810 600-603 morioka20031020 PUBLIC 0001 002445026CER ARTICLE ConferencePaper 730553 SzGeCERN 20180924170130.0 oai:cds.cern.ch:730553 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN 10.1109/TASC.2004.831046 DOI CERN annual report 2004-3.0650 SPIRES 5863031 Inspire 649316 CERN-AT-2004-007-ECR eng Pengo, R Heat Load Measurements on a Large Superconducting Magnet An Application of a Void Fraction Meter 2004 Geneva CERN 14 Apr 2004 5 p paper ATLAS is one of the two major experiments of the LHC project at CERN using cryogenics. The superconducting magnet system of ATLAS is composed of the Barrel Toroid (BT), two End Caps Toroids and the Central Solenoid. The BT is formed of 8 race-track superconducting dipoles, each one 25 m long and 5 m wide. A reduced scale prototype (named B0) of one of the 8 dipoles, about one third of the length, has been constructed and tested in a dedicated cryogenic facility at CERN. To simulate the final thermal and hydraulic operating conditions, the B0 was cooled by a forced flow of 4.5 K saturated liquid helium provided by a centrifugal pump of 80 g/s nominal capacity. Both static and dynamic heat loads, generated by the induced currents on the B0 casing during a slow dump or a ramp up, have been measured to verify the expected thermal budget of the entire BT. The instrument used for the heat load measurements was a Void Fraction Meter (VFM) installed on the magnet return line. The instrument constructed at CERN was calibrated in order to provide direct readings of heat loads. An example of application of the VFM measuring method to a largescale apparatus cooled at liquid helium temperature. CERN EDS UNCL SzGeCERN Accelerators and Storage Rings ARTICLE CERN Dolgetta, N Junker, S Passardi, Giorgio ten Kate, H H J AT 1704-1707 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-007-ECR http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002443115 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-007 Access to fulltext document http://cds.cern.ch/record/730553/files/at-2004-007.pdf Access to fulltext document http://cds.cern.ch/record/730553/files/cer-002443115.pdf IEEE Published version, local copy evelyne.delucinge@cern.ch CERN Euratom-CEA Cadarache, Saint-Paul-Lez-Durance, France INFN-LNL, Italy n 200420 a2004 13 20100901 1606 CER01 20040416 600810 1704-1707 morioka20031020 PUBLIC 0001 002443115CER ARTICLE ConferencePaper 730550 SzGeCERN 20180924170130.0 oai:cds.cern.ch:730550 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN 10.1109/TASC.2004.829121 DOI CERN annual report 2004-3.0676 SPIRES 5863023 Inspire 649315 CERN-AT-2004-010-MAS eng Devred, Arnaud High field accelerator magnet R&D in Europe 2004 Geneva CERN 14 Apr 2004 7 p paper The LHC magnet R&D program has shown that the limit of NbTi technology at 1.9 K was in the 10-to-10.5-T range. Hence, to go beyond the 10-T threshold, it is necessary to change the superconducting material. Given the state of the art in HTS, the only serious candidate is Nb$_{3}$Sn. A series of dipole magnet models built at Twente University and LBNL as well as a vigorous program carried out at Fermilab have demonstrated the feasibility of Nb$_{3}$Sn magnet technology. The next step is to bring this technology to maturity, which require further conductor and conductor insulation development and a simplification of manufacturing processes. After a brief history, we review ongoing R&D programs in Europe and we present the Next European Dipole (NED) initiative promoted by the European Steering Group on Accelerator R&D (ESGARD). CERN EDS UNCL SzGeCERN Accelerators and Storage Rings ARTICLE CERN Baynham, D Elwyn Bottura, L Chorowski, M Fabbricatore, P Leroy, D den Ouden, A Rifflet, J M Rossi, L Vincent-Viry, O Volpini, G AT 339-344 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-010-MAS http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002443120 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-010 Access to fulltext document http://cds.cern.ch/record/730550/files/at-2004-010.pdf Access to fulltext document http://cds.cern.ch/record/730550/files/cer-002443120.pdf IEEE Published version, local copy evelyne.delucinge@cern.ch CEA/DSM/DAPNIA/SACM, Gif-sur-Yvette, France CCLRC-RAL, Engineering Department, Chilton, UK CERN Inst. of Power Engineering and Fluid Mechanics, Wroclaw TU INFN-Genova, Italy Univ.Twente, Department of Applied Phys., Enschede, The Netherland CEA/DSM/DAPNIA/SACM, Gif-sur-Yvette Cedex, France INFN-Milano/LASA, Segrate (Milano), Italy n 200420 a2004 13 20100901 1606 CER01 20040416 600810 339-344 morioka20031020 PUBLIC 0001 002443120CER ARTICLE ConferencePaper 730549 SzGeCERN 20180924170130.0 oai:cds.cern.ch:730549 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN 10.1109/TASC.2004.829984 DOI CERN annual report 2004-3.1432 SPIRES 5863015 Inspire 649314 CERN-AT-2004-009-MEL eng Borburgh, J Septum magnet MNP-23 for the CERN PS experimental area and its fast interlock system 2004 Geneva CERN 14 Apr 2004 5 p paper Two MNP-23 septum-like magnets are installed at CERN in the transfer line from the Proton Synchrotron (PS) to the East Hall Experimental Area. They are exposed to extremely high doses of ionizing radiation. In the past, the magnets experienced two catastrophic failures due to overheating of its coils and cannot be repaired. The magnets of improved design which is subject of this article are built as replacements for the magnets presently installed. The MNP-23 is a resistive C shaped iron-dominated magnet made of solid low carbon steel blocks. The excitation windings consist of two water-cooled coils wound from hollow copper conductor. The septum design of these magnets implies a high current density which requires an efficient water cooling system. The newly designed cooling circuit provides better cooling performance and more reliability. To avoid failures due to coil overheating, an elaborate interlock system was developed and installed. It consists of two parts: firstly a slow, more classic sensor, to detect gradual water blockages and inlet cooling water temperature rises and secondly a fast response device to detect sudden loss of water cooling due to external leaks or sudden blockage of one of the water cooling circuits in the coil. The article outlines the unusual and challenging design of the magnet and its interlock system and describes the hardware as well as its performance. CERN EDS CLAS1 SzGeCERN Accelerators and Storage Rings ARTICLE CERN CERN PS XX Masson, T Prost, A Zickler, T AT 596-599 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-009-MEL http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002443118 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-009 Access to fulltext document http://cds.cern.ch/record/730549/files/at-2004-009.pdf Access to fulltext document http://cds.cern.ch/record/730549/files/cer-002443118.pdf IEEE Published version, local copy evelyne.delucinge@cern.ch CERN n 200420 a2004 13 20100901 1606 CER01 20040416 600810 596-599 morioka20031020 PUBLIC 0001 002443118CER ARTICLE ConferencePaper 730548 SzGeCERN 20180924170131.0 oai:cds.cern.ch:730548 cerncds:FULLTEXT cerncds:CERN:FULLTEXT cerncds:CERN 10.1109/TASC.2004.831048 DOI CERN annual report 2004-3.0736 SPIRES 5863007 Inspire 649313 CERN-AT-2004-008-ECR eng Perinic, G Installation and commissioning of the helium refrigeration system for the CMS Magnet 2004 Geneva CERN 14 Apr 2004 4 p paper A new helium refrigeration plant with a cooling capacity of 800 W at 4.45 K, 4500 W between 60 K and 80 K, and 4 g/s liquefaction simultaneously has been installed in its temporary position inside the Compact Muon Solenoid assembly hall at CERN. The commissioning of the compressor station has been achieved, the commissioning of the cold box and the cryostats is under way. First operation results are presented. CERN EDS CLAS1 SzGeCERN Accelerators and Storage Rings ARTICLE CERN CERN LHC CMS Dupont, T F Legrand, Dominique Pezzetti, M AT 1708-1710 2 IEEE Trans. Appl. Supercond. 14 2004 CERN Depot 4, bldg. 500-S-023 (DE4) CERN-AT-2004-008-ECR http://documents.cern.ch/cgi-bin/setlink?base=generic&categ=public&id=cer-002443116 IEEE Published version, local copy http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=at-2004-008 Access to fulltext document http://cds.cern.ch/record/730548/files/at-2004-008.pdf Access to fulltext document http://cds.cern.ch/record/730548/files/cer-002443116.pdf IEEE Published version, local copy evelyne.delucinge@cern.ch CERN n 200420 a2004 13 20100901 1606 CER01 20040416 600810 1708-1710 morioka20031020 PUBLIC 0001 002443116CER ARTICLE ConferencePaper