Evaluation of Various Nb-Rod-Method Cu-Nb/Nb3Sn Wires Designed for Practical React-and-Wind Coils

Masahiro Sugimoto, Hirokazu Tsubouchi, Hideki Ii, Kota Katayama, Daisuke Asami, Satoshi Awaji, Hidetoshi Oguro

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Bronze-processed Cu-Nb/Nb3Sn wires, composed of the Nb-rod-method Cu-Nb reinforcing stabilizer around the Nb3Sn filament bundle, have superior mechanical strength after Nb3Sn reaction heat-treatment at both low temperature and room temperature. The Cu-Nb/Nb3Sn wires are able to be applied to the react-and-wind (R&W) process. Moreover, the non-Cu-Jc values of Cu-Nb/Nb3Sn wires are remarkably increased by using both the high-tin-bronze and appropriate pre-bending treatments. In this study, we developed Cu-Nb/Nb3Sn wires with various cross-sectional structures which were improved the Ic values under tensile stress and transvers compression stress. Also, we confirmed Ic improvements by pre-bending treatments of a Cu-Nb/Nb3Sn triplet cable and small size Rutherford cables. Cu-Nb/Nb3Sn wires and cables can be designed on requirements of Nb3Sn coils.

Original languageEnglish
Article number9018221
JournalIEEE Transactions on Applied Superconductivity
Issue number4
Publication statusPublished - 2020 Jun 1


  • Cu-Nb/NbSn wire
  • Nb-rod-method Cu-Nb
  • Prebending effect
  • React-and-wind

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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