Fast neutron irradiation effect on superconducting properties of Nb 3Sn and Nb3Al strands

A. Nishimura, T. Takeuchi, S. Nishijima, H. Oguro, K. Ochiai, K. Watanabe, Tatsuo Shikama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

To investigate neutron irradiation effects on superconducting properties, fast neutron irradiation tests of Nb3Sn and Nb3Al strands were carried out using 14 MeV neutron source and fission reactors. Neutron fluence of 2.65×1021 n/m2 was achieved at 14 Mev neutron facility and it was clarified that the critical current in the lower magnetic field increased significantly whereas it did not change in the higher magnetic field, and that the critical temperature decreased by 0.2 K and the critical magnetic field did not change. The fission neutron irradiated samples were investigated by SQUID and clear change in magnetization was measured. The 1.0 × 1022 n/m2 irradiation at JRR-3 increased the magnetization hysteresis curve, which means improvement of the critical current, and the over 1024 n/m2 irradiation degraded and made the strands no superconductivity. In case of Nb3Al strand, the proper heat treatment recovered the property remarkably

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering - Transactions of the International Cryogenic Materials Conference, ICMC
Pages217-224
Number of pages8
DOIs
Publication statusPublished - 2012
Event2011 Joint Cryogenic Engineering and International Cryogenic Materials Conferences, CEC/ICMC 2011 - Spokane, WA, United States
Duration: 2011 Jun 132011 Jun 17

Publication series

NameAIP Conference Proceedings
Volume1435
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other2011 Joint Cryogenic Engineering and International Cryogenic Materials Conferences, CEC/ICMC 2011
CountryUnited States
CitySpokane, WA
Period11/6/1311/6/17

Keywords

  • Fusion magnet
  • Magnetization
  • Nb Al
  • NbSn
  • Neutron irradiation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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