Study on change in superconducting properties by neutron irradiation

2012 Fiscal Year Final Research Report

• Project/Area Number: 22560824
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: NISHIMURA Arata 核融合科学研究所, ヘリカル研究部, 教授 (60156099)
• Project Period (FY): 2010 – 2012
• Keywords: 中性子照射 / 超伝導 / ニオブ錫線材 / 臨界温度 / 臨界磁場 / 臨界電流

Research Abstract

Neutron irradiation tests on Nb3Sn strands were carried out in a fission reactor and the magnetization and the critical temperatures were measured to discuss the effect of irradiation on the superconductivity. When the irradiation of 10^<22> n/m2 (> 0.1 MeV) was done, the critical current increased. But the irradiation of 10^<24> n/m2 damaged the strand and it did not show the superconductivity. The irradiation would strengthen the pinning force resulting in increasing the critical current.

Research Products

• [Journal Article] Study on neutron irradiation effect of superconductors and installation of 15.5 T magnet in hot laboratory at IMR in Tohoku University (2011)
  • Author(s): A. Nishimura, T. Takeuchi, S. Nishijima, K. Ochiai, G. Nishijima, K. Watanabe, M. Narui, H. Kurishita, T. Shikama
  • Journal Title: Journal of Nuclear Materials Volume: Vol. 417 Pages: 842-845
  • Peer Reviewed
• [Journal Article] 14 MeV Neutron Irradiation Effect on Critical Current and Critical Magnetic Field of Nb3Sn and Nb3Al Wires (2010)
  • Author(s): A. Nishimura, T. Takeuchi, S. Nishijima, K. Ochiai, G. Nishijima, K. Watanabe, and T. Shikama
  • Journal Title: Advances in Cryogenic Engineering Volume: Vol. 56 Pages: 255-262
  • Peer Reviewed
• [Presentation] A new facility for investigation on neutron irradiation effect on superconducting properties of Nb3Sn strand for fusion magnet (2012)
  • Author(s): A. Nishimura, T. Takeuchi, Gen Nishijima, K. Ochiai, K. Watanabe, D. Li, T. Shikama
  • Organizer: The 27th Symposium on Fusion Technology
  • Place of Presentation: Liege, Belgium
  • Year and Date: 2012-09-26
• [Presentation] Recent Results of Neutron Irradiation Effects on Superconducting Magnet Materials in Japan (2011)
  • Author(s): A. Nishimura, T. Takeuchi, G. Nishijima, S. Nishijima, Y. Izumi, M. Imaizumi, T. Hemmi, K. Ochiai, H. Oguro, K. Watanabe, T. Shikama
  • Organizer: Asia Plasma and Fusion Association Conference
  • Place of Presentation: Guilin, China
  • Year and Date: 2011-11-02
• [Presentation] Effects of Fast Neutron Irradiation on Nb3Sn Strand (2011)
  • Author(s): A. Nishimura, T. Takeuchi, G. Nishijima, H. Oguro, K. Watanabe, K. Ochiai, T. Shikama
  • Organizer: The 22nd Magnet Technology Conference
  • Place of Presentation: Marseille, France
  • Year and Date: 2011-09-14
• [Presentation] Neutron Irradiation Effects on Superconducting Magnet Materials for Fusion (2011)
  • Author(s): A. Nishimura
  • Organizer: 6th Korea-Japan-Berkeley Symposium
  • Place of Presentation: UC Berkeley, USA
  • Year and Date: 2011-06-28
• [Presentation] Fast Neutron Irradiation Effect on Superconducting Properties of Nb3Sn and Nb3Al Strands (2011)
  • Author(s): A. Nishimura, T. Takeuchi, S. Nishijima, H. Oguro, K. Ochiai, K. Watanabe, T. Shikama
  • Organizer: International Cryogenic Material Conference
  • Place of Presentation: Spokane, USA
  • Year and Date: 2011-06-16
• [Presentation] 中性子照射によるNb3Sn、Nb3Al 素線の超伝導特性変化 (2010)
  • Author(s): 西村 新、竹内 孝夫、西嶋 茂宏、西島 元、 小黒俊英、渡辺 和雄、四竃 樹男、落合謙太 郎
  • Organizer: 低温工学・超電導学会
  • Place of Presentation: 鹿児島
  • Year and Date: 2010-12-02
• [Presentation] 超伝導材料の中性子照射効果- 15.5T 超伝導マグネットシステムの管理区域 への導入- (2010)
  • Author(s): 西村 新、竹内 孝夫、西島 元、渡辺 和 雄、山崎 正徳、四竃 樹男、広瀬 量一、三 木 孝史
  • Organizer: 低温工学・超電導学会
  • Place of Presentation: 鹿児島
  • Year and Date: 2010-12-02