15T cryocooled Nb3Sn superconducting magnet with a 52 mm room temperature bore

Kazuo Watanabe, Satoshi Awaji, Mitsuhiro Motokawa, Yukio Mikami, Junji Sakuraba, Keiichi Watazawa

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50 Citations (Scopus)


We succeeded in demonstrating a 15.1 T cryocooled Nb3Sn superconducting magnet with a 52mm room temperature bore. Two operating currents of 157 A and 90 A for the divided section coils were utilized for the first time in a cryocooled superconducting magnet system. It is found that the current leads are no longer the dominant heat loads because of the use of high-temperature superconductors. In order to realize a high-field cryocooled superconducting magnet comparable to the usual superconducting magnet immersed in liquid helium at 4.2 K, we maintained the coil temperature at a value below 5.0 K during the field sweep in a high magnetic field region.

Original languageEnglish
Pages (from-to)L1148-L1150
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number10 PART A
Publication statusPublished - 1998 Oct 1


  • Cryocooled superconducting magnet
  • High magnetic field
  • High-T current lead
  • NbSn, BiSrCaCuO

ASJC Scopus subject areas

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


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