Compact design of a 30T superconducting magnet incorporating YBa 2Cu3O7 coated conductor tapes and pre-reacted Nb3Sn strand cables

Kazuo Watanabe, Gen Nishijima, Satoshi Awaji, Takataro Hamajima, Tsukasa Kiyoshi, Hiroaki Kumakura, Kei Koyanagi, Satoshi Hanai, Michitaka Ono

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We set out to design as compactly as possible a 30 T superconducting magnet consisting of an YBa2CU3O7 (Y123) insert coll and a CuNbrelnforced Nb3Sn (CuNb/Nb3Sn) background coil. The engineering current density Je for an Y123-coated conductor tape is larger at 14-15T and 4.2 K than that for a CuNb/Nb3Sn strand. Adopting Y123-coated conductor tapes in the high field region above 14-15T proves highly effective for the fabrication of a very compact 30 T superconducting magnet. A 30T, 52 mm-room-temperature bore superconducting magnet can be constructed in the coll grading of a 16T Y123 insert and a 14T CuNb/Nb3Sn background coil, and the stored magnetic energy of 32MJ successfully lies in the 1/3 level in comparison with the 30T nuclear-magnetic-resonance (NMR) superconducting magnet reported previously.

Original languageEnglish
Pages (from-to)1017031-1017033
Number of pages3
JournalApplied Physics Express
Issue number10
Publication statusPublished - 2008 Oct 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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