A Cryocooled Superconducting Magnet for High Magnetic Field Science

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  • Ishizuka M.
    Research and Development Center, Sumitomo Heavy Industries, Ltd.
  • Itou T.
    Research and Development Center, Sumitomo Heavy Industries, Ltd.
  • Sakuraba J.
    Research and Development Center, Sumitomo Heavy Industries, Ltd.
  • Awaji S.
    Institute for Materials Research, Tohoku University
  • Nishijima G.
    Institute for Materials Research, Tohoku University
  • Watanabe K.
    Institute for Materials Research, Tohoku University

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Other Title
  • 強磁場科学用冷凍機冷却超電導マグネットの開発
  • キョウジバ カガクヨウ レイトウキ レイキャク チョウデンドウ マグネット ノ カイハツ

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Abstract

We have developed a cryocooled superconducting magnet for the 28 T hybrid magnet. The liquidhelium-free hybrid magnet has been designed to generate the magnetic field of 28 T that can be accomplished bycombining 9 T generation due to the cryocooled superconducting magnet with 19 T generation due to a water-cooledresistive magnet, which is inserted into a room bore of the superconducting magnet. In this work, we developed the 10T cryocooled superconducting magnet with the 360 mm room bore, whose inner coils are wound for employinghigh-strength Nb3Sn wires in consideration of large hoop stress. The liquid helium-free hybrid magnet has reachedthe generation of 27.5 T, which is greatly useful for high magnetic field science. The hybrid magnet also achieved thehigh magnetic-force field (B·dBz/dz) of 4500 T2/m, which could levitate materials of small magnetic susceptibility such as an InSb semiconductor.

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