Angular dependence evaluation of high current HTS conductors for high field NMR magnet development

• Project/Area Number: 16K06286
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: NISHIJIMA Gen 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 主幹研究員 (30333884)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: 高温超伝導 / 臨界電流 / NMR / 強磁場 / 磁場 / 角度依存性

Outline of Final Research Achievements

Two probes to measure angular dependence of superconducting properties were designed and constructed. One was a vertical type, on which the sample was set vertically in a horizontal magnetic field generated by a superconducting split-pair magnet. The other one was a horizontal type, on which the sample was set horizontally in a vertical field by a superconducting solenoid magnet. Because faults were happened frequently not only in the superconducting magnet but also the variable temperature insert (VTI), targets were not achieved. Knowledges about superconducting properties of RE-based superconducting joint samples were obtained from a pinning mechanism point of view. Knowledges about helium leak tests were expanded during the frequent tests of vacuum chamber of VTI.

Academic Significance and Societal Importance of the Research Achievements

高温超伝導のマグネット応用における最大の弱点であった超伝導接続が少しずつ発展しているが、これを工学応用可能な技術に育て上げるためには、その材料科学的側面からの理解だけでなく、電磁気現象論的側面からの理解が必要である。本研究は、現象論的理解を進めることに貢献する。

Research Products

• [Journal Article] Transport Property of REBCO Superconducting Joints in Magnetic Fields at Various Temperatures (2019)
  • Author(s): Gen Nishijima et al.
  • Journal Title: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY Volume: 29 Issue: 5 Pages: 6602105-6602105
  • DOI: 10.1109/tasc.2019.2907713
  • Peer Reviewed
• [Presentation] Development of Liquid Nitrogen Cooled RE-Ba-Cu-O Superconducting Magnet for NMR Use (2017)
  • Author(s): Gen Nishijima, Hitoshi Kitaguchi, and Kazuyuki Takeda
  • Organizer: 25th International Conference on Magnet Technology
  • Int'l Joint Research