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Mass production results of superconducting cables for CS and EF coils of JT-60SA

JT-60SAのCSとEFコイル用超伝導撚線の量産結果

杉本 昌弘*; 小杉 恵三*; 片山 功多*; 伊井 秀樹*; 高木 亮*; 遠藤 壮*; 清水 仁司*; 坪内 宏和*; 木津 要; 吉田 清

Sugimoto, Masahiro*; Kosugi, Keizo*; Katayama, Kota*; Ii, Hideki*; Takagi, Akira*; Endo, Sakaru*; Shimizu, Hitoshi*; Tsubouchi, Hirokazu*; Kizu, Kaname; Yoshida, Kiyoshi

JT-60SAの中心ソレノイド(CS)と平衡磁場(EF)コイル用の3種類の超伝導撚線の量産が完遂した。製作した超伝導素線の低温特性は十分に要求性能を満足するもので、かつ、その特性のばらつきは小さく、高い生産上の歩留まりも達成した。EF撚線に施されたニッケルめっきは素線間の摩擦がクロムめっきのCS撚線に比べ大きいことが見いだされ、初期には撚線中の断線が生じた。結果として、新規に開発した検査装置を用いた撚線手法は、撚線製作性を飛躍的に向上させ、品質保証に対しても効果的であった。

We have successfully manufactured all superconducting cables for CS and EF coils of JT-60SA. The low temperature performance of superconducting wires satisfied the specifications under sufficiently low deviations and high production yields. Ni-plated strands of EF cables having the larger sliding friction between strands than that of Cr-plated strands of CS cable caused difficulties on the cabling without any defects. Consequently, the newly developed cabling techniques with the original inspection apparatus significantly enhanced the manufacturability and were effective for guarantee of the quality.

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