@article{oai:repo.qst.go.jp:00048239,
 author = {諏訪, 友音 and 齊藤, 徹 and 高橋, 良和 and 押切, 雅幸 and 堤, 史明 and 礒野, 高明 and 布谷, 嘉彦 and Suwa, Tomone and Saito, Toru and Takahashi, Yoshikazu and Oshikiri, Masayuki and Tsutsumi, Fumiaki and Isono, Takaaki and Nunoya, Yoshihiko},
 issue = {4},
 journal = {IEEE Transactions on Applied Superconductivity},
 month = {Jan},
 note = {The ITER Central Solenoid is composed Nb3Sn
cable-in-conduit conductor. Short twist pitch cable design is
appropriate for the CS cables to maintain the current sharing
temperature under electromagnetic loading cycles. In the
production process of the short twist pitch CS cable, Nb3Sn
strands and Cu strands are cabled tightly and compressed to get
circular shape. However, these process induced strong interstrand
contact force and the strands deformation. The strand
performance are degrade by the severe indentation on the
strands at the contact point between the strands, although the
strands is deformed before the heat-treatment. Therefore,
influence of the indentation on critical current and residual
resistive ratio were investigated in two types of bronze-route and
an internal-tin Nb3Sn strands which are used for the CS cable, in
order to determine the threshold of indentation depth in the
strands. Also, transverse cross-sectional observation by EPMA
was carried out on the indented strands to investigate the damage
in the cross-section. Before August 2016, 37 CS cables were
manufactured. On 37 CS cables manufactured before August
2016, numbers of indentations on the Nb3Sn strands were
investigated to confirm whether there was indentation on the
Nb3Sn strands which degrades the strand performance.},
 pages = {4201505-1--4201505-5},
 title = {The Effect of Indentation Depth on Performances of Nb3Sn Strands in cable of ITER Central Solenoid},
 volume = {27},
 year = {2017}
}