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3.
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Electrical and Magnetic Performance of the LHC Short Straight Sections
/ Sanfilippo, S (CERN) ; Beauquis, J (CERN) ; Bottura, L (CERN) ; Buzio, M (CERN) ; Coccoli, M (CERN) ; García-Pérez, J (CERN) ; Pugnat, P (CERN) ; Sammut, N (CERN) ; Siemko, A (CERN) ; Smirnov, N (CERN) et al.
The Short Straight Section (SSS) for the Large Hadron Collider arcs, containing in a common cryostat the lattice quadrupoles and correction magnets, have now entered series production. The foremost features of the lattice quadrupole magnets are a two-in-one structure containing two 56Â mm aperture, two-layers coils wound from 15.1Â mm wide NbTi cables, enclosed by the stainless steel collars and ferromagnetic yoke, and inserted into the inertia tube. [...]
LHC-PROJECT-Report-903; CERN-LHC-Project-Report-903.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 265-268
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.265-268
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8.
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Production of Low-Carbon Magnetic Steel for the LHC Superconducting Dipole and Quadrupole Magnets
/ Bertinelli, F (CERN) ; Comel, S (Cockerill Sambre - ARCELOR Group, Liege, Belgium) ; Harlet, P (Cockerill Sambre - ARCELOR Group, Liege, Belgium) ; Peiro, G (CERN) ; Russo, A (CERN) ; Taquet, A (Cockerill Sambre - ARCELOR Group, Liege, Belgium)
In 1996 CERN negotiated a contract with Cockerill Sambre â ARCELOR Group for the supply of 50Â 000 tonnes of low-carbon steel for the LHC main magnets: this was the first contract to be placed for the project, and one of the single largest. In 2005 â after nine years of work â the contract is being successfully completed. [...]
LHC-PROJECT-Report-898; CERN-LHC-Project-Report-898.-
Geneva : CERN, 2006 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 1777-1781
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.1777-1781
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9.
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The LHC Main Quadrupoles during Series Fabrication
/ Tortschanoff, Theodor ; Burgmer, R ; Durante, M ; Hagen, P ; Klein, U ; Krischel, D ; Payn, A ; Rossi, L ; Schellong, B ; Schmidt, P et al.
By the end of August 2005 about 320 of the 400 main LHC quadrupole magnets have been fabricated and about 220 of them assembled into their cold masses, together with corrector magnets. [...]
LHC-PROJECT-Report-897 ; CERN-LHC-Project-Report-897.
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2006. - 5 p.
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11.
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Long Term Stability of the LHC Superconducting Cryodipoles after Outdoor Storage
/ Seyvet, F (CERN) ; Arnau-Izquierdo, G (CERN) ; Bertarelli, A (CERN) ; Denis, O (CERN) ; El-Kallassi, P (CERN) ; Fernández-Cano, E D (CERN) ; Fessia, P (CERN) ; Ilie, S D (CERN) ; Jeanneret, J B (CERN) ; Letant, D (CERN) et al.
The main superconducting dipoles for the LHC are being stored outdoors for periods from a few weeks to several years after conditioning with dry nitrogen gas. Such a storage before installation in the 27 km circumference tunnel may affect not only the mechanical and cryogenic functionality of the cryodipoles but also their quench and field performance. [...]
LHC-PROJECT-Report-895; CERN-LHC-Project-Report-895.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 180-183
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.180-183
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13.
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A Correlation Study between Geometry of Collared Coils and Normal Quadrupole Multipole in the Main LHC Dipoles
/ Bertinelli, F (CERN) ; Boter-Rebollo, E (CELLS - ALBA, LLS) ; Berthollon-Vitte, S (CERN) ; Glaude, D (CERN) ; Vanenkov, I (CERN)
The quality control implemented at all LHC dipole assemblers includes precise mechanical measurements of the geometry of collared coils. A cross-analysis performed between mechanical and magnetic measurements data shows a correlation between collared coils outer dimensions and the normal quadrupole multipole (b2) for one dipole assembler. [...]
LHC-PROJECT-Report-893; CERN-LHC-Project-Report-893.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 192-195
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.192-195
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14.
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Production of Austenitic Steel for the LHC Superconducting Dipole Magnets
/ Bertinelli, F (CERN) ; Fudanoki, F (NSSC, Japan) ; Komori, T (NSSC, Japan) ; Peiro, G (CERN) ; Rossi, L (CERN)
The austenitic-steel collars are an important component of the LHC dipole magnets, operating at cryogenic temperature under high mechanical stress. The required steel, known as YUS 130S, has been specifically developed for this application by Nippon Steel Corporation (NSC), who was awarded a CERN contract in 1999 for the supply of 11 500 tonnes. [...]
LHC-PROJECT-Report-892; CERN-LHC-Project-Report-892.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 1773-1776
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.1773-1776
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15.
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Control of the Dipole Cold Mass Geometry at CERN to Optimize LHC Performance
/ Wildner, E (CERN) ; Beauquis, J (CERN) ; La China, M (CERN) ; Tommasini, D (CERN)
The detailed shape of the 15 m long superconducting LHC dipole cold mass is of high importance as it determines three key parameters: the beam aperture, nominally of the order of 10 beam standard deviations; the connectivity of the beam- and technical lines between magnets; the transverse position of non-linear correctors mounted on the dipole ends. An offset of the latter produces unwanted beam dynamics perturbations. [...]
LHC-PROJECT-Report-891; CERN-LHC-Project-Report-891.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 212-215
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In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.212-215
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19.
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Dependence of Magnetic Field Quality on Collar Supplier and Dimensions in the Main LHC Dipole
/ Bellesia, B (CERN) ; Bertinelli, F (CERN) ; Santoni, C (CERN ; U. Blaise Pascal, Clermont-Ferrand) ; Todesco, E (CERN)
In order to keep the electro-magnetic forces and to minimize conductor movements, the superconducting coils of the main Large Hadron Collider dipoles are held in place by means of austenitic steel collars. Two suppliers provide the collars necessary for the whole LHC production, which has now reached more than 800 collared coils. [...]
LHC-PROJECT-Report-887; CERN-LHC-Project-Report-887.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 196-199
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.196-199
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21.
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Critical Current Density in Superconducting Nb-Ti Strands in the 100 mT to 11 T Applied Field Range
/ Boutboul, T ; Le Naour, S ; Leroy, D ; Oberli, L ; Previtali, V
The knowledge of the critical current density in a wide temperature and applied magnetic field range is a crucial issue for the design of a superconducting magnet, especially for determining both current and temperature margins. The critical current density of LHC-type Nb-Ti strands of 0.82 and 0.48 mm diameter was measured by means of critical current and magnetization measurements at both 4.2 K and 1.9 K and for a broad magnetic field range (up to 11 T). [...]
LHC-PROJECT-Report-885; CERN-LHC-Project-Report-885.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 1184-1187
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In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.1184-1187
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25.
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LHC Superconducting Dipole Production Follow-up : Results of Audit on QA Aspects in Industry
/ Modena, M (CERN) ; Bajko, M (CERN) ; Cornelis, M (CERN) ; Fessia, P (CERN) ; Liénard, P (CERN) ; Miles, J (CERN) ; de Rijk, G (CERN) ; Savary, F (CERN) ; Sgobba, Stefano (CERN) ; Tommasini, D (CERN) et al.
The manufacturing of the 1232 Superconducting Main Dipoles for LHC is under way at three European Contractors: Alstom-Jeumont (Consortium), Ansaldo Superconduttori Genova and Babcock Noell Nuclear. The manufacturing is proceeding in a very satisfactory way and in March 2005 the mid production was achieved. [...]
LHC-PROJECT-Report-881; CERN-LHC-Project-Report-881.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 188-191
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In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.188-191
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26.
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Electrical Integrity Tests during Production of the LHC Dipoles
/ de Rijk, G (CERN) ; Bajko, M (CERN) ; Cornelis, M (CERN) ; Fessia, P (CERN) ; Miles, J (CERN) ; Modena, M (CERN) ; Molinari, G (CERN) ; Rinn, J (CERN) ; Savary, F (CERN) ; Vlogaert, J (CERN)
For the LHC dipoles, mandatory electrical integrity tests are performed to qualify the cold mass (CM) at four production stages: individual pole, collared coil, CM before end cover welding and final CM. A description of the measurement equipment and its recent development are presented. [...]
LHC-PROJECT-Report-880; CERN-LHC-Project-Report-880.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 200-203
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.200-203
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28.
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Normal-Conducting Separation and Compensation Dipoles for the LHC Experimental Insertions
/ Ramberger, S (CERN) ; Bidon, S (CERN) ; Cornuet, D (CERN) ; Gérard, D (CERN) ; Gurov, D (Novosibirsk, IYF) ; Hans, O (CERN) ; Kalbreier, Willi (CERN) ; Kiselev, O (Novosibirsk, IYF) ; Morozov, I (Novosibirsk, IYF) ; Ogurtsov, A (Novosibirsk, IYF) et al.
The experimental insertions of the LHC make use of normal-conducting magnets to provide for part of the beam separation and to compensate the effect of two large spectrometer dipoles. Three different types with respect to the length were designed and are based on the same type of lamination. [...]
LHC-PROJECT-Report-878; CERN-LHC-Project-Report-878.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond.
- Published in : , pp. 281-283
Access to fulltext document: PDF; Published version: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.1642837
20th Russian Conference on Charged Particle Accelerators, Novosibirsk, Russia, 10 - 14 Sep 2006, pp.281-283
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31.
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Stability of the Horizontal Curvature of the LHC Cryodipoles During Cold Tests
/ Cano, E D Fernandez ; Buzio, M (CERN) ; García-Pérez, J (CERN) ; Jeanneret, Jean Bernard (CERN) ; Poncet, A (CERN) ; Seyvet, F (CERN) ; Tovar-Gonzalez, A (CERN) ; Wildner, E (CERN)
The LHC will be composed of 1232 horizontally curved, 15 meter long, superconducting dipole magnets cooled at 1.9 K. They are supported within their vacuum vessel by three Glass Fiber Reinforced Epoxy (GFRE) support posts. [...]
LHC-PROJECT-Report-875; CERN-LHC-Project-Report-875.-
Geneva : CERN, 2006 - 5 p.
- Published in : 10.1109/TASC.2006.870492
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In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.176-179
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32.
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Focusing Strength Measurements of the Main Quadrupoles for the LHC
/ Smirnov, N (CERN) ; Bottura, L (CERN) ; Calvi, M (CERN) ; Deferne, G (CERN) ; Di Marco, J (Fermilab) ; Sammut, N (CERN) ; Sanfilippo, S (CERN)
More than 1100 quadrupole magnets of different types are needed for the Large Hadron Collider (LHC) which is in the construction stage at CERN. The most challenging parameter to measure on these quadrupoles is the integrated gradient (Gdl). [...]
LHC-PROJECT-Report-874; CERN-LHC-Project-Report-874.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 261-264
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In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.261-264
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33.
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Performance of the Room Temperature Systems for Magnetic Field Measurements of the LHC Superconducting Magnets
/ García-Pérez, J (CERN) ; Billan, J (CERN) ; Buzio, M (CERN) ; Galbraith, P (CERN) ; Giloteaux, D (CERN) ; Remondino, Vittorio (CERN)
The LHC will be composed of 1232 horizontally curved, 15-meter long, superconducting dipole assemblies and 474 Short Straight Sections containing various types of quadrupoles. These magnets are manufactured by several European companies and half of them are currently produced. [...]
LHC-PROJECT-Report-873; CERN-LHC-Project-Report-873.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 269-272
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.269-272
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34.
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Impact of the First Powering Cycles on the LHC Superconducting Dipole Coil Geometry
/ Calvi, M (CERN) ; Todesco, E (CERN) ; Bottura, L (CERN) ; Sanfilippo, S (CERN) ; Siemko, A (CERN)
The impact of the first powering cycles on the LHC superconducting dipoles coil geometry has been investigated. Dedicated magnetic measurements have been performed to estimate the changes in the geometric component of the harmonics, caused by the last highest Lorentz force the coil has ever experienced. [...]
LHC-PROJECT-Report-872; CERN-LHC-Project-Report-872.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 184-187
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.184-187
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35.
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Short Circuit Localization in the LHC Main Dipole Coils by means of Room Temperature Magnetic Measurements
/ Bellesia, B (CERN) ; Molinari, G (CERN) ; Santoni, C (CERN ; U. Blaise Pascal, Clermont-Ferrand) ; Scandale, Walter (CERN) ; Todesco, E (CERN)
During the construction of the LHC main dipoles, 12 cases of short circuits between the cables of the superconducting coils have been detected. Some of them appeared only under the press, making impossible their localization after disassembly. [...]
LHC-PROJECT-Report-871; CERN-LHC-Project-Report-871.-
Geneva : CERN, 2006 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 16 (2006) 208-2011
Access to fulltext document: PDF;
In : 19th International Conference on Magnet Technology, Genoa, Italy, 18 - 23 Sep 2005, pp.208-211
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36.
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Warm and Cold Magnetic and Mechanical Alignment Tests of LHC Short Straight Sections
/ Buzio, M ; Beauquis, J ; Bottura, L ; Coccoli, M ; Deferne, G ; Krotov, N ; Laface, E ; Ruccio, A ; García-Pérez, J ; Missiaen, D et al.
This paper contains a summary of the results of the magnetic and mechanical alignment tests performed at CERN on the first 111 arc Short Straight Sections. [...]
LHC-PROJECT-Report-870 ; CERN-LHC-Project-Report-870.
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2006. - 5 p.
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37.
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Checking the Polarity of Superconducting Multipole LHC Magnets
/ Buzio, M ; Bottura, L ; Brun, G ; Fievez, G ; Galbraith, P ; García-Pérez, J ; López, R ; Masi, A ; Russenschuck, Stephan ; Smirnov, N et al.
This paper describes the design and operation of the âﾜPolarity Checkerâ, a scanning probe designed to check multipole field order, type and polarity of superconducting LHC magnets. [...]
LHC-PROJECT-Report-869 ; CERN-LHC-Project-Report-869.
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2006. - 5 p.
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38.
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The Bending Magnets for the Proton Transfer Line of CNGS
/ Schirm, K M ; Kalbreier, Willi ; Anashin, V ; Kiselev, O ; Maraev, V ; Ogurtsov, A ; Pupkov, Yu ; Ruvinsky, E ; Zhilyaev, K ; Konstantinov, Yu S et al.
The project "CERN neutrinos to Gran Sasso (CNGS)", a collaboration between CERN and the INFN (Gran Sasso Laboratory) in Italy, will study neutrino oscillations in a long base-line experiment. [...]
CERN-AT-2006-003-MEL.
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2006. - 5 p.
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39.
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Analytical Model of Thermo-electrical Behaviour in Superconducting Resistive Core Cables
/ Calvi, M ; Bottura, L ; Breschi, M ; Coccoli, M ; Granieri, P ; Iriart, G ; Lecci, F ; Siemko, A
High field superconducting Nb$_{3}$Sn accelerators magnets above 14 T, for future High Energy Physics applications, call for improvements in the design of the protection system against resistive transitions. [...]
CERN-AT-2006-004-MTM.
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2006. - 6 p.
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