11 T liquid helium-free superconducting magnet

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

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

An 11 T liquid helium-free superconducting magnet designed at 6 K in vacuum using high temperature superconducting current leads was developed. The NbTi/Nb3Sn coil was conductively cooled down from room temperature to 4.1 K in 40 h by two 4 K GM-cryocoolers. In a performance test, the coil temperature rose to 6.8 K for the inner Nb3Sn coil and 5.9 K for the outer NbTi coil, while sweeping the field at 5 A min-1. A central field of 10.7 T in a 52 mm room temperature bore was generated at an operating current of 149 A. Holding the field at 10.5 T was achieved continuously for 24 h at a constant coil temperature of 4.8 K.

Original languageEnglish
Pages (from-to)1019-1025
Number of pages7
JournalCryogenics
Volume36
Issue number12
DOIs
Publication statusPublished - 1996 Dec 1

Keywords

  • GM-cryocooler
  • High field
  • High temperature superconducting current lead
  • Superconducting magnet

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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