Neutron irradiation effects on superconducting wires and insulating materials

Arata Nishimura, Takao Takeuchi, Shigehiro Nishijima, Gen Nishijima, Tatsuo Shikama, Kentaro Ochiai, Norikiyo Koizumi

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


On the progress of the Deuterium-Deuterium (D-D) or Deuterium-Tritium (D-T) burning plasma devices, the importance of neutron irradiation on superconducting magnet materials increases and the data base is desired to design the next generation devices. To carry out the investigations on the effect of neutron irradiation, neutron irradiation fields are required together with post-irradiation test facilities. In these several years, a collaboration network of neutron irradiation effect on superconducting magnet materials has been constructed. 14 MeV neutron irradiation was carried out at Fusion Neutronics Sources (FNS) in Japan Atomic Energy Agency (JAEA) and fission neutron irradiation was performed at JRR-3 in JAEA. After the irradiation, the Nb3Sn, NbTi and Nb3Al samples were sent to High Field Laboratory for Superconducting Materials (HFLSM) in Tohoku University and the superconducting properties were evaluated with 28 T hybrid magnet. Also, the organic insulation materials are considered to be weaker than superconducting materials against neutron irradiation and cyanate ester resin composite was fabricated and tested at the fission reactor. One clear result on Nb3Sn was the property change of Nb3Sn by 14 MeV neutron irradiation over 13 T. The critical current was increased by 1.4 times around 13 T but the increment of the critical current became almost zero at higher magnetic fields and the critical magnetic field of the irradiated sample showed almost the same as non-irradiated one.

Original languageEnglish
Pages (from-to)1425-1428
Number of pages4
JournalFusion Engineering and Design
Issue number7-11
Publication statusPublished - 2009 Jun 1


  • Knock-on effect
  • Neutron irradiation
  • Organic insulation materials
  • Pinning site
  • Superconducting wire

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering


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