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Critical current test results of 13T-46kA Nb$$_{3}$$Al cable-in-conduit conductor

13T-46kA Nb$$_{3}$$Alケーブル・イン・コンジット導体の臨界電流値試験結果

小泉 徳潔; 高橋 良和; 布谷 嘉彦; 松井 邦浩; 安藤 俊就; 辻 博史; 奥野 清; 東 克典*; Fuchs, A.*; Bruzzone, P.*; Vecsey, G.*

Koizumi, Norikiyo; Takahashi, Yoshikazu; Nunoya, Yoshihiko; Matsui, Kunihiro; Ando, Toshinari; Tsuji, Hiroshi; Okuno, Kiyoshi; Azuma, Katsunori*; Fuchs, A.*; Bruzzone, P.*; Vecsey, G.*

ITER-EDAの一環として、Nb$$_{3}$$All導体とReact-and-wind法のITER-TFコイルへの適用性を実証するために、13T-46kA級ステンレス鋼製ジャケットNb$$_{3}$$Al導体を開発した。本導体が曲げ歪を加えた場合も含めて、臨界電流値性能を達成できることを確認するために、臨界電流値試験を実施した。試験は、磁場7,9,10,11T,温度6-9Kの範囲で行った。また、予想臨界電流値を評価するために開発した解析モデルによる計算の結果、実験結果は計算結果とよく一致することがわかった。したがって、本導体の製造過程が妥当であり、かつ、React-and-wind法の適用が可能であることを実証できた。

In the framework of ITER-EDA, a 13 T – 46 kA Nb$$_{3}$$Al conductor with stainless steel jacket has been developed to demonstrate applicability of an Nb$$_{3}$$Al conductor with react-and-wind technique to ITER-TF coils. The critical current performances of the Nb$$_{3}$$Al conductors were studied to verify that the conductor achieves the expected performance and 0.4% bending strain does not originate degradation. The critical currents were measured at the background magnetic fields of 7, 9, 10 and 11 T at the temperatures from 6 to 9 K. The expected critical currents is calculated using the developed model and the calculation results indicate that the experimental results showed good agreement with the expected critical currents. Accordingly, we can conclude that the fabrication process of this conductor was appropriate and the applicability of the react-and-wind technique was demonstrated.

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