波状曲げ変形を受けたNb<sub>3</sub>Sn 素線の臨界電流特性評価手法の開発

DOI Web Site Web Site 参考文献9件
  • 梶谷 秀樹
    早稲田大学　理工学術院 日本原子力研究開発機構　核融合研究開発部門　超伝導コイル開発Gr
  • 石山 敦士
    早稲田大学　理工学術院
  • 我妻 洸
    早稲田大学　理工学術院
  • 村上 陽之
    日本原子力研究開発機構　核融合研究開発部門　超伝導コイル開発Gr
  • 辺見 努
    日本原子力研究開発機構　核融合研究開発部門　超伝導コイル開発Gr
  • 小泉 徳潔
    日本原子力研究開発機構　核融合研究開発部門　超伝導コイル開発Gr

書誌事項

タイトル別名
  • Development of Evaluation Procedure for Critical Current of Periodically Bent Nb<sub>3</sub>Sn Strand
  • 波状曲げ変形を受けたNb₃Sn素線の臨界電流特性評価手法の開発
  • ハジョウ マゲ ヘンケイ オ ウケタ Nb ₃ Snソセン ノ リンカイ デンリュウ トクセイ ヒョウカ シュホウ ノ カイハツ

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抄録

A<tt> </tt>cable-in-conduit (CIC) conductor using Nb3Sn strand is applied to an ITER TF coil. The Nb3Sn strand in the conductor is periodically bent due to electromagnetic force, which causes degradation of performance. This degradation should be evaluated to predict conductor critical current performance. In a past study, a numerical simulation model was developed to evaluate the superconductivity of a periodically bent single strand. However, this model is not suitable for application to strands in the conductor because of the extensive calculation time required. The author thus developed a new analytical model with a much shorter calculation time to evaluate the performance of periodically bent strand. This new model uses the classical model concept of a high transverse resistance model (HTRM). The calculated results show good agreement with the test results of a periodically bent Nb3Sn strand in a ends fixed beam model while there was little error in the uniformly bent model under high transverse load due to the difference in bending moment distribution between the two models. However, for both cases, the newly developed model has a much shorter calculation time than that required for numerical simulation. This indicates that a more practical solution can be achieved when evaluating the performance of periodically bent strands. Thus, the model developed in this study can be applied to evaluation of the performance of conductor incorporating many strands.

収録刊行物

  • 低温工学

    低温工学 50 (12), 608-615, 2015

    公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)

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