Practical use of a liquid helium-free superconducting magnet

K. Watanabe, T. Masumoto, S. Awaji, M. Motokawa, J. Sakuraba, K. Watazawa, T. Hasebe, K. Jikihara, M. Ishihara, Y. Yamada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A cryocooler-cooled 4.6 T superconducting magnet with a 38 mm room temperature bore, which consists of a low-Tc Nb3Sn coil and high-Tc Bi2Sr2Ca2Cu3O10 current leads, has been working in vacuum for about 18000 cooling hours without trouble. It is found that the high-Tc current leads can hold excellent superconducting properties for a long enough time to be practically used. As a next step, we have succeeded in the construction of a 10.7 T-52 mm room temperature bore and a 5.7 T-220 mm room temperature bore liquid helium-free superconducting magnet.

Original languageEnglish
Pages (from-to)411-414
Number of pages4
JournalScience Reports of the Rerearch Institutes Tohoku University Series A-Physics
Issue number2
Publication statusPublished - 1996 May


  • Cryocooler
  • High temperature superconducting current lead
  • Liquid helium free
  • Superconducting magnet


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