Liquid helium-free superconducting magnets and their applications

K. Watanabe, S. Awaji, T. Fukase, Y. Yamada, J. Sakuraba, F. Hata, C. K. Chong, T. Hasebe, M. Ishihara

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


A new superconducting magnet (4.6 T, 38 mm room temperature bore) which consists of a low-Tc Nb3Sn superconducting magnet and high-Tc Bi2Sr2Ca2Cu3O10 current leads has been working in vacuum for about 7400 hours without trouble. An experiment at a field of 3.7 T, which is generated by an operating current of 370 A, has been continuously performed for 1200 hours. The high-Tc current leads have experienced 13 thermal cycles from room temperature to 10 K. 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, an 11 T-52 mm room temperature bore, a 6 T-220 mm room temperature bore and a 5 T-50 mm × 10 mm room temperature gap liquid helium-free superconducting magnet are now under construction.

Original languageEnglish
Pages (from-to)639-642
Number of pages4
Issue numberSUPPL. 1
Publication statusPublished - 1994


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