Tohoku high magnetic field research activities using cryogen-free superconducting magnets

K. Watanabe, S. Awaji, K. Koyama, G. Nishijima, K. Takahashi, Y. Sasaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In order to realize a hybrid magnet with no need of liquid helium for operation, we have designed a 28 T cryogen-free hybrid magnet with a 32 mm room temperature experimental bore, and actually tested to generate the peak field of 27.5 T. An easy-to-operate cryogen-free hybrid magnet is now operating for basic research in high fields up to 27 T at low temperatures down to 40 mK, using a dilution refrigerator. In addition, we are intending to develop a 100 mm wide bore water-cooled resistive insert magnet combined with a cryogen-free superconducting outsert magnet for X-ray diffraction measurements in steady magnetic fields up to 20 T. It found that YBa 2Cu 3O 7 (Y123) coated conductor tape with Hastelloy substrate has the excellent mechanical property of 1000 MPa hoop stress tolerance. We are carrying out the research and development of a 30 T all superconducting magnet immersed in liquid helium and a 23 T cryogen-free superconducting magnet, employing Y123 tape.

Original languageEnglish
Pages (from-to)370-373
Number of pages4
JournalJournal of Low Temperature Physics
Volume159
Issue number1-2
DOIs
Publication statusPublished - 2010 Apr 1

Keywords

  • Cryogen-free magnet
  • High field X-ray diffraction
  • Magnet technology

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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