Performance of a 14-T CuNb/Nb3Sn Rutherford coil with a 300 mm wide cold bore

Hidetoshi Oguro, Kazuo Watanabe, Satoshi Awaji, Satoshi Hanai, Shigeru Ioka, Masahiro Sugimoto, Hirokazu Tsubouchi

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14 Citations (Scopus)


A large-bore 14-T CuNb/Nb3Sn Rutherford coil was developed for a 25 T cryogen-free superconducting magnet. The magnet consisted of a low-temperature superconducting (LTS) magnet of NbTi and Nb3Sn Rutherford coils, and a high-temperature superconducting magnet. The Nb3Sn Rutherford coil was fabricated by the react-and-wind method for the first time. The LTS magnet reached the designed operation current of 854 A without a training quench at a 1 h ramp rate. The central magnetic field generated by the LTS magnet was measured by a Hall sensor to be 14.0 T at 854 A in a 300 mm cold bore.

Original languageEnglish
Article number084004
JournalSuperconductor Science and Technology
Issue number8
Publication statusPublished - 2016 Jun 30


  • NbSn
  • Rutherford cable
  • cryogen-free
  • superconducting magne


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