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Report No.
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Development of large current superconductors using high performance Nb$$_{3}$$Sn strand for ITER

Koizumi, Norikiyo; Isono, Takaaki; Hamada, Kazuya; Nunoya, Yoshihiko; Matsui, Kunihiro; Nabara, Yoshihiro; Okuno, Kiyoshi

Both mass production technique of strand having high critical current enough to recover the degradation observed in the model coil conductor and also trial fabrication of the ITER-TF cable and conduit section were successfully performed. Critical current degradation by spatially periodic transverse load was both experimentally and numerically studied. The simulation results show that the transverse resistance among the filaments significantly affect on degree of the degradation. The test results also showed that the developed strand has almost the same resistance against the transverse load as the TFMC strand. Therefore, the small degradation of the TF conductor, i.e., stable operation of the TF conductor is preliminarily anticipated.

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Category:Physics, Applied

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