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Investigation of Superconducting Properties of {\rm Nb}_{3}{\rm Sn} Strands by Internal Tin Process for ITER

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9 Author(s)
Li, C.G. ; State Key Lab. of Solidification Technol., Northwestern Polytech. Univ., Xi''an, China ; Xiao, C.J. ; Guan, J.Q. ; Sun, X.G.
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The multifilamentary Nb3Sn strands with a diameter of 0.82 mm and different local area ratios of Nb to copper (LAR) have been successfully fabricated by an internal tin process in Western Superconducting Technologies Co., Ltd. (WST). The heat treatments have been completed in a vacuum condition. The Critical Current (Ic) and hysteresis loss of the strands are measured after different heat treatments according to ITER requirement. The maximum Ic is about 285 A (4.22 K, 12 T, 0.1 ??V/cm) and the hysteresis loss is 290 ~ 410 mJ/cm3 (4.22 K, ??3 T) per strand unit volume. In this paper, the Ic and the hysteresis loss of the strands with different LARs and different heat treatments are investigated. It is a reference for fabricating the qualified Nb3Sn strands for ITER project in large scale in WST.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:20 ,  Issue: 3 )

Date of Publication:

June 2010

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