Design of joint structure with electromagnetic forces in a remountable high-temperature superconducting magnet by quantification of joint resistance generating mechanism

2013 Fiscal Year Final Research Report

• Project/Area Number: 23686132
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: Tohoku University
• Principal Investigator: ITO Satoshi 東北大学, 工学(系)研究科(研究院), 助教 (60422078)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 電磁・マグネット / 超伝導材料・素子 / プラズマ・核融合

Research Abstract

Research and development of mechanical joint of high-temperature superconducting (HTS) conductor are required for a remountable HTS magnet proposed to realize a fusion reactor having high economic efficiency and maintainability. In this research, joint resistance generating mechanism was quantified based on superconductivity and contact theories, then a method of joint resistance prediction needed to investigate joint structure for a mechanical joint of a large-scale conductor. In addition, we proposed mechanical bridge and edge joints as new mechanical joints and demonstrate low joint resistance with the joints using experiments and numerical analyses. Furthermore, we discussed the optimum structural design for a remountable magnet based on structural analysis and indicated feasibility of the remountable magnet based on calculation of electric power to run a cryo-plant.

Research Products

• [Journal Article] Performance of a Mechanical Bridge Joint for 30-kA-class High-temperature Superconducting Conductors (2014)
  • Author(s): S. Ito, K. Kawai, Y. Seino, T. Ohinata, Y. Tanno, N. Yanagi, Y. Terazaki, K. Natsume, S. Hamaguchi, H. Noguchi, H. Tamura, T. Mito, A. Sagara, H. Hashizume
  • Journal Title: IEEE Transactions on Applied Superconductivity Volume: 24-3巻 Pages: 4602305
  • DOI: 10.1109/TASC.2013.2291157
  • Peer Reviewed
• [Journal Article] Joint Resistance Characteristics of Mechanical Lap Joint of a GdBCO Tape with a Change in Temperature and Magnetic Field (2014)
  • Author(s): Y. Seino, S. Ito, H. Hashizume
  • Journal Title: IEEE Transactions on Applied Superconductivity Volume: 24-3 Pages: 4602105
  • DOI: 10.1109/TASC.2013.2289356
• [Journal Article] Proposal of Electrical Edge Joint for a Demountable High-Temperature Superconducting Magnet (2012)
  • Author(s): S. Ito, L. Bromberg, M. Takayasu, J.V. Minervini, H. Hashizume
  • Journal Title: IEEE Transactions on Plasma Science Volume: 40-5巻 Pages: 1446-1452
  • DOI: 10.1109/TPS.2012.2190103
• [Presentation] ヘリカル型核融合炉への適用を目指した100 kA級高温超伝導導体の製作と試験(2)接合部抵抗評価 (2013)
  • Author(s): 伊藤悟,清野祐太郎,柳長門,寺﨑義朗,相良明男
  • Organizer: 第88回(2013年秋季)低温工学・超電導学会
  • Place of Presentation: ウィンクあいち(愛知県名古屋市
  • Year and Date: 2013-12-06
• [Presentation] 分割型高温超伝導マグネットのための高温超伝導導体の機械的エッジジョイントの基礎研究 (2012)
  • Author(s): 伊藤悟, L. Bromberg, M. Takayasu, J.V. Minervini,橋爪秀利
  • Organizer: 第9回核融合エネルギー連合講演会
  • Place of Presentation: 神戸国際会議場(兵庫県神戸市)
  • Year and Date: 2012-06-28
• [Presentation] Discussion of structural design issues on a remountable high-temperature superconducting magnet (2011)
  • Author(s): S. Ito, H. Hashizume, H. Tamura, N. Yanagi, S. Imagawa, A. Sagara
  • Organizer: 21st International Toki Conference
  • Place of Presentation: セラトピア土岐(岐阜県土岐市
  • Year and Date: 2011-11-29