DocumentCode :
1066226
Title :
Assembly and Tests of SQ02, a Nb 3Sn Racetrack Quadrupole Magnet for LARP
Author :
Ferracin, P. ; Ambrosio, G. ; Barzi, E. ; Caspi, S. ; Dietderich, D.R. ; Feher, S. ; Gourlay, S.A. ; Hafalia, A.R. ; Hannaford, C.R. ; Lizarazo, J. ; Lietzke, A.F. ; McInturff, A.D. ; Sabbi, G.L. ; Zlobin, A.V.
Author_Institution :
Lawrence Berkeley Nat. Lab, Berkeley
Volume :
17
Issue :
2
fYear :
2007
fDate :
6/1/2007 12:00:00 AM
Firstpage :
1019
Lastpage :
1022
Abstract :
The US LHC Accelerator Research Program (LARP) is developing accelerator magnets for a possible LHC luminosity upgrade. As part of the LARP supporting R&D, a subscale racetrack quadrupole magnet (SQ) has been developed in order to provide a cost effective tool for technology development studies. The first magnet (SQO1), reported earlier, was tested as a proof-of-principle model that applied for the first time LBNL shell-based loading structure to racetrack coils in a quadrupole configuration. The new loading structure, pre-loaded with water-pressurized bladders and keys, provided predictable and controllable pre-stress to four subscale racetrack coils, both in the end region and across the straight section. A second magnet (SQO2) has been recently completed, with the goal of assessing the conductor performance and the influence of the coil axial support on training. SQO2 implements four new coils wound around aluminum bronze islands and instrumented with voltage taps and spot heaters, in order to monitor quench locations and propagation velocities. This paper reports the SQO2 test results, including magnet quench performance with respect to short sample expectations, training history, and quench locations.
Keywords :
accelerator magnets; niobium alloys; superconducting coils; tin alloys; type II superconductors; LARP; LHC luminosity upgrade; Nb3Sn; SQO2 assembly; SQO2 tests; US LHC accelerator research program accelerator magnets; aluminum bronze islands; cost effective tool; magnet quench; quench locations; racetrack quadrupole magnet; short sample expectations; spot heaters; subscale racetrack coils; training history; voltage taps; water pressurized bladders; Accelerator magnets; Assembly; Bladder; Coils; Conductors; Costs; Large Hadron Collider; Niobium; Testing; Wounds; LARP; Nb $_{3}$Sn; superconducting magnets;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2007.898513
Filename :
4277383
Link To Document :
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