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2.
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Fabrication of the Pre-Series Wide Aperture Superconducting Quadrupoles for the LHC Insertions
/ Kirby, G A ; Catalan-Lasheras, N ; Ostojic, R ; Burgmer, R ; Jordan, M ; Krischel, D ; Schmidt, P
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. [...]
LHC-Project-Report-717; CERN-LHC-Project-Report-717.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 207-210
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.207-210
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3.
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Field Decay and Snapback Measurements Using a Fast Hall Probe Sensor
/ Pieloni, T ; Sanfilippo, S ; Bottura, L ; Haverkamp, M ; Tikhov, A ; Effinger, E ; Benedico, E ; Smirnov, N
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". [...]
LHC-Project-Report-716; CERN-LHC-Project-Report-716.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 1822-1825
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.1822-1825
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4.
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The Quench Protection System for the LHC Test String 2
/ Rodríguez-Mateos, F ; Dahlerup-Petersen, K ; Denz, R ; Milani, D ; Tegenfeldt, F
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. [...]
LHC-Project-Report-715; CERN-LHC-Project-Report-715.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 251-254
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.251-254
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5.
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Normal Conducting Separation Dipoles for the LHC Beam Cleaning Insertions
/ Bidon, S ; Gerard, D ; Hans, O ; Kalbreier, Willi ; Kiselev, O ; Petrov, V ; Protopopov, I V ; Pupkov, Yu A ; Ramberger, S ; de Rijk, G et al.
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. [...]
LHC-Project-Report-714; CERN-LHC-Project-Report-714.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 437-440
Fulltext: cer-002444982 - PDF; lhc-project-report-714 - PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.437-440
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6.
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Design and Assembly of the Pre-Series Quadrupoles for the LHC Insertions
/ Ostojic, R ; Lucas, J ; Kirby, G A ; Pérez, J C ; Prin, H
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. [...]
LHC-Project-Report-713; CERN-LHC-Project-Report-713.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 203-206
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.203-206
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7.
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Construction and Qualification of the Pre-Series MQM Superconducting Quadrupoles for the LHC Insertions
/ Ostojic, R ; Catalan-Lasheras, N ; Lucas, J ; Venturini-Delsolaro, W ; Landgrebe, D
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. [...]
LHC-Project-Report-712; CERN-LHC-Project-Report-712.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 199-202
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.199-202
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9.
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Status of the Production of the LHC Superconducting Corrector Magnets
/ Allitt, M ; Ijspeert, Albert ; Karppinen, M ; Mazet, J ; Wolf, R
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. [...]
LHC-Project-Report-710; CERN-LHC-Project-Report-710.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 195-198
Fulltext: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.195-198
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10.
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The LHC Pre-series Dipole Cold Mass Geometry
/ Bajko, M ; Chamizo, R ; Savary, F ; Skoczen, B ; Veness, R J M ; Jeanneret, J B
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. [...]
LHC-Project-Report-709; CERN-LHC-Project-Report-709.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 215-218
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.215-218
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11.
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Deformations and Displacements of the LHC Superconducting Dipoles Induced by Standard and Non-Standard Operational Modes
/ La China, M ; García-Pérez, J ; Gubello, G ; Scandale, Walter
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. [...]
LHC-Project-Report-708; CERN-LHC-Project-Report-708.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 211-214
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.211-214
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12.
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Quench Performance and Field Quality of the LHC Preseries Superconducting Dipoles
/ Siemko, A (CERN) ; 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) et al.
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. [...]
LHC-Project-Report-707; CERN-LHC-Project-Report-707.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 165-168
Access to fulltext document: PDF; IEEE Published version, local copy: PDF; External link: server
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.165-168
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13.
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Results of Magnetic Axis Measurements on a Prototype Main Lattice Quadrupole for the LHC
/ Smirnov, N ; Buzio, M ; Deferne, G ; Parma, V ; Rohmig, P ; Tortschanoff, Theodor
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). [...]
LHC-Project-Report-706; CERN-LHC-Project-Report-706.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 243-246
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.243-246
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14.
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Correlations between Field Quality and Geometry of Components in the Collared Coils of the LHC Main Dipoles
/ Bellesia, B ; Remondino, Vittorio ; Scandale, Walter ; Todesco, Ezio ; Völlinger, C
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. [...]
LHC-Project-Report-705; CERN-LHC-Project-Report-705.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 219-222
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.219-222
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15.
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Steering field quality in the main dipole magnets of the Large Hadron Collider
/ Todesco, Ezio ; Bellesia, B ; Bottura, L ; Devred, Arnaud ; Remondino, Vittorio ; Pauletta, S ; Sanfilippo, S ; Scandale, Walter ; Völlinger, C ; Wildner, E
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. [...]
LHC-Project-Report-704; CERN-LHC-Project-Report-704.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 177-180
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.177-180
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16.
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Production Follow-Up of the LHC Main Dipoles through Magnetic Measurements at Room Temperature
/ Wildner, E ; Pauletta, S ; Remondino, Vittorio ; Scandale, Walter ; Todesco, Ezio ; Völlinger, C
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. [...]
LHC-Project-Report-703; CERN-LHC-Project-Report-703.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 173-176
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.173-176
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17.
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Reliability of the longitudinal welds of LHC main dipoles
/ Fessia, P ; Lanza, C ; Sgobba, Stefano
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. [...]
LHC-Project-Report-702; CERN-LHC-Project-Report-702.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 1185-1188
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.1185-1188
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18.
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Shape analysis of the LHC Pre-series Dipoles
/ Gubello, G ; La China, M ; Scandale, Walter
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. [...]
LHC-Project-Report-701; CERN-LHC-Project-Report-701.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 231-234
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.231-234
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19.
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Magnetic Alignment Measurements at Room and Cryogenic Temperature of LHC Cryodipoles and Associated Correctors at CERN
/ Bottura, L ; Buzio, M ; Coccoli, M ; Deferne, G ; García-Pérez, J ; Smirnov, N
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. [...]
LHC-Project-Report-700; CERN-LHC-Project-Report-700.-
Geneva : CERN, 2004 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 227-230
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.227-230
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20.
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Statistical Analysis of Conductor Motion in LHC Superconducting Dipole Magnets
/ Calvi, M ; Ponomarev, N ; Pugnat, P ; Siemko, A
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. [...]
LHC-Project-Report-699; CERN-LHC-Project-Report-699.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond.
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.223-226
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21.
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Fabrication and performance of Nb$_{3}$Sn Rutherford-type cable with Cu added as a separate component
/ Coccoli, M ; Scanlan, R M ; Calvi, M ; Caspi, S ; Chiesa, L ; Hafalia, R R ; Higley, H C ; Dietderich, D R ; Gourlay, S A ; Lietzke, A F et al.
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. [...]
CERN-AT-2004-012-MTM.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 971-974
IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.971-974
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22.
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QTG quadrupole magnets for the CNGS transfer line
/ Cornuet, D ; Kiselev, O ; Levichev, E B ; Pavlov, O ; Pupkov, Yu A ; Ruvinsky, E ; Zickler, T
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. [...]
CERN-AT-2004-011-MTM.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 600-603
IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.600-603
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23.
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Heat Load Measurements on a Large Superconducting Magnet : An Application of a Void Fraction Meter
/ Pengo, R ; Dolgetta, N ; Junker, S ; Passardi, Giorgio ; ten Kate, H H J
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. [...]
CERN-AT-2004-007-ECR.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 1704-1707
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.1704-1707
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24.
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High field accelerator magnet R&D in Europe
/ Devred, Arnaud ; Baynham, D Elwyn ; Bottura, L ; Chorowski, M ; Fabbricatore, P ; Leroy, D ; den Ouden, A ; Rifflet, J M ; Rossi, L ; Vincent-Viry, O et al.
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. [...]
CERN-AT-2004-010-MAS.-
Geneva : CERN, 2004 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 339-344
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.339-344
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25.
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Septum magnet MNP-23 for the CERN PS experimental area and its fast interlock system
/ Borburgh, J ; Masson, T ; Prost, A ; Zickler, T
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. [...]
CERN-AT-2004-009-MEL.-
Geneva : CERN, 2004 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 596-599
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.596-599
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26.
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Installation and commissioning of the helium refrigeration system for the CMS Magnet
/ Perinic, G ; Dupont, T F ; Legrand, Dominique ; Pezzetti, M
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. [...]
CERN-AT-2004-008-ECR.-
Geneva : CERN, 2004 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 14 (2004) 1708-1710
Access to fulltext document: PDF; IEEE Published version, local copy: PDF;
In : 18th International Conference on Magnet Technology, Morioka, Japan, 20 - 24 Oct 2003, pp.1708-1710
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