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Impact of Coil Compaction on {\hbox {Nb}}_{3}{\hbox {Sn}} LARP HQ Magnet

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22 Author(s)
Felice, H. ; Lawrence Berkeley Nat. Lab., Berkeley, CA, USA ; Ambrosio, G. ; Anerella, M.D. ; Bocian, D.
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In the past two years the US LARP program carried out five tests on a quadrupole magnet aimed at the high luminosity upgrade of Large Hadron Collider (HiLumi-LHC). The 1-meter long, 120 mm bore IR quadrupole magnet (HQ) with a short sample gradient of 219 T/m at 1.9 K and a conductor peak field of 15 T is part of the US LHC Accelerator Research Program (LARP). In a series of tests, carried out at 4.4 K, the magnet reached a maximum “short-sample” performance of 86%. The tests exposed several shortcomings that are now being addressed in a Research & Development program. This paper summarizes the magnet test results, reveals findings, R&D actions and future improvements.

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Applied Superconductivity, IEEE Transactions on  (Volume:22 ,  Issue: 3 )