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Test Results of LARP 3.6 m {\rm Nb}_{3}{\rm Sn} Racetrack Coils Supported by Full-Length and Segmented Shell Structures

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30 Author(s)
Joseph F. Muratore ; Supercond. Magn. Div., Brookhaven Nat. Lab., Upton, NY, USA ; Giorgio Ambrosio ; Michael Anerella ; Emanuela Barzi
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As part of the LHC Accelerator Research Program (LARP) to build a high performance quadrupole magnet with Nb3Sn conductor, a pair of 3.6 m-long Nb3Sn racetrack coils has been made at Brookhaven National Laboratory (BNL) and installed in two shell-type support structures built by Lawrence Berkeley National Laboratory (LBL). These magnet assemblies have been tested at 4.5 K at BNL to gauge the effect of extended length and prestress on the mechanical performance of the long structure compared to earlier short models. This paper presents the results of quench testing and compares the overall performance of the two versions of the support structure. We also summarize the shell strain measurements and discuss the variation of quench current with ramp rate.

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IEEE Transactions on Applied Superconductivity  (Volume:19 ,  Issue: 3 )