Application of prebending effect to triplet cables using bronze-route Nb3Sn strands

作者：Nishijima Gen^*; Oguro Hidetoshi; Awaji Satoshi; Tsubouchi Hirokazu; Hanai Satoshi; Watanabe Kazuo

来源：IEEE Transactions on Applied Superconductivity, 2007, 17(2): 2595-2598.

DOI：10.1109/TASC.2007.899591

• critical current
• CuNb/Nb3Sn
• high-strength
• prebending effect
• triplet cable

An application of the prebending effect to a cabling process using Nb3Sn strands was demonstrated. The prebending effect is the enhancement effect of superconducting properties due to the repeated prebending treatment for practical bronze-route Nb3Sn wires. CuNb/Nb3Sn and Cu/Nb3Sn strands were applied prebending treatment using 10 fixed pulleys with 0.8% prebending strain. Four kinds of triplets, i.e., prebent CuNb/Nb3Sn, no-prebent CuNb/Nb3Sn, prebent Cu/Nb3Sn and no-prebent Cu/Nb3Sn triplets were fabricated. Critical currents were measured for the four kinds of triplets in magnetic fields up to 11 T at 4.2 K. The obvious critical current enhancement due to the prebending effect was maintained for the prebent CuNb/Nb3Sn triplet. The results imply that the prebending treatment for high-strength Nb3Sn strands is applicable to the cable conductor fabrication.

• 出版日期2007-6