Cryocooler Cooled Superconducting Magnets and Their Applications

  • T. Hasebe
  • J. Sakuraba
  • K. Jikihara
  • K. Watazawa
  • H. Mitsubori
  • Y. Sugizaki
  • H. Okubo
  • Y. Yamada
  • S. Awaji
  • K. Watanabe
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

Various types of cryocooler cooled superconducting magnets have been constructed and already used for some applications. An 11 T-52 mm room temperature bore magnet is used for a high-field heat treatment equipment, a 6 T-220 mm room temperature bore magnet is used for a new experiment on the electrochemical reaction in high fields, and a 5 T-50 mm bore with 10 mm gap split type magnet has been combined with an X-ray diffraction apparatus.

As a latest product, we have constructed a 10 T-100 mm room temperature bore cryocooler cooled superconducting magnet. The axis of the room temperature bore can be set vertically, horizontally or at any angle. The operating current was increased at a sweep rate of 0.25 A per second. It took about 11 minutes from 0 A to 162 A, which is the operating current for 10 T. The maximum central field of 10 T was held continuously for 9 hours at a constant coil temperature of 4.1 K.

Keywords

Heat Load Cooling Stage Superconducting Magnet Coil Temperature Field Sweep 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    K. Watanabe, Y. Yamada, J. Sakuraba, F. Hata, C.K. Chong, T. Hasebe and M. Ishihara, (Nb,Ti)3Sn superconducting magnet operating at 11 K in vacuum using high-Tc (Bi,Pb)2Sr2Ca2Cu3O10 current leads, Jpn.J.Appl.Phys. 32:L488(1993).CrossRefGoogle Scholar
  2. 2.
    T. Kuriyama, M. Urata, T. Yazawa, K. Yamamoto, Y. Ohtani, K. Koyanagi, T. Masegi, Y. Yamada, S. Nomura, H. Maeda, H. Nakagome and O. Horigami, Cryocooler directly cooled 6 T NbTi superconducting magnet system with 180 mm room temperature bore, Cryogenics, 34:643(1994).CrossRefGoogle Scholar
  3. 3.
    E.L. Laskaris, R. Ackermann, B. Dorri, D. Gross, K. Herd and C. Minas, A cryogen-free open superconducting magnet for interventional MRI applications, IEEE Trans. Appl. Superconductivity, 5:163(1995).CrossRefGoogle Scholar
  4. 4.
    K. Watanabe, S. Awaji, J. Sakuraba, K. Watazawa, T. Hasebe, K. Jikihara, Y. Yamada and M. Ishihara, 11 T liquid helium-free superconducting magnet, Cryogenics, 36:1019(1996).CrossRefGoogle Scholar
  5. 5.
    K. Watanabe, T. Masumoto, S. awaji, I. Mogi, M. Motokawa, K. Watazavva, J. Sakuraba, T. Hasebe, M. Ishihara and Y. Yamada, Cryocooler-cooled large bore NbTi Superconducting magnet using high temperature superconducting current leads, Proceedings of the 16 the ICEC/ICMC, 1121 (1997).Google Scholar
  6. 6.
    K. Watanabe, S. Awaji, J. Sakuraba, K. Jikihara, K. Watazavva, T. Hasebe, F. Hata, C.K. Chong, Y. Yamada and M. Ishihara, Cryogen-free split-pair superconducting magnet with a 50 mm × 10 mm room temperature gap, in: “Advances in Cryogenics Engineering”, Plenum Press, New York(1996), 41:319.CrossRefGoogle Scholar
  7. 7.
    K. Shibata, Y. Kurita, T. Shimonosono, Y. Murakami, S. Awaji and K. Watanabe, Effects of high magnetic fields on martensitic transformation at cryogenic temperatures for variously heat treated stainless steels, in: “Advances in Cryogenics Engineering Mterials”, Plenum Press, New York(1994), 40:1207.Google Scholar
  8. 8.
    K. Watanabe, S. Awaji and K. Kimura, Development of high field heat-treatment equipment and relevant applications, Jpn.J.Appl.Phys. 36:L673(1997).CrossRefGoogle Scholar
  9. 9.
    K. Watanabe, Y. Watanabe, S. Awaji, M. Fujiwara, N. Kobayashi and T. Hasebe, X-ray diffraction investigation in high fields at low temperature for Nd0.5Sr0.5MnO3 Submitted to : “Advances in Cryogenics Engineering Materials” , Plenum Press, New York(1997, in press).Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • T. Hasebe
    • 1
  • J. Sakuraba
    • 1
  • K. Jikihara
    • 1
  • K. Watazawa
    • 1
  • H. Mitsubori
    • 1
  • Y. Sugizaki
    • 1
  • H. Okubo
    • 1
  • Y. Yamada
    • 1
  • S. Awaji
    • 2
  • K. Watanabe
    • 2
  1. 1.Research and Development CenterSumitomo Heavy Industries, ltd.Kanagawa, 254Japan
  2. 2.Institute for Materials ResearchTohoku UniversityMiyagiJapan

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