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Development of Pre-Bent High-Strength {\rm Nb}_{3}{\rm Sn} Cable With Stainless-Steel Reinforcement Strands

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5 Author(s)
Gen Nishijima ; High Field Lab. for Supercond. Mater., Tohoku Univ., Sendai, Japan ; Hidetoshi Oguro ; Satoshi Awaji ; Hirokazu Tsubouchi
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A 7-strand Nb3Sn superconducting cable, which consists of three pre-bent CuNb/Nb3Sn strands, three stainless-steel (SS) strands, and a center SS strand, was fabricated. 2.5 turns of the cable was wound on a 262-mm diameter GFRP bobbin A triplet consisting of three pre-bent CuNb/Nb3Sn strands was also tested for comparison. The reinforcement effect of stainless-steel strands in a cable was investigated to develop a high-strength large-current superconducting cable. The hoop stress test result indicated that the stainless-steel reinforced CuNb/Nb3Sn cable showed better performance than the CuNb/Nb3Sn triplet under the hoop stress, because the stainless-steel strands reduced the hoop stress on Nb3Sn strands. Furthermore, the solder impregnation of the cable, which made the seven strands a monolithic conductor, improved its performance.

Published in:

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