A review article: Compact magnetic field generators containing HTS bulk magnets cooled by refrigerators and their feasible applications

Tetsuo Oka, Jun Ogawa, Satoshi Fukui, Takao Sato, Tomohito Nakano, Kazuya Yokoyama, Takashi Nakamura, Hiroyuki Fujishiro, Koshichi Noto

研究成果: Chapter

2 被引用数 (Scopus)

抄録

Various types of strong magnetic field generators with use of HTS bulk magnets and the small-scale refrigerators have been actually proposed and experimentally estimated for the feasible applications. The most characteristic feature of bulk magnets is regarded as compact and strong field generators with respect to their magnetic field spaces or their machine structures of themselves. Among them, the magnetic flux density of the face-toface magnetic poles reached 3.2 T and 4.4 T when they were activated by the pulsed field magnetization and the field cooling method, respectively. Furthermore, a very small bulk magnet generating 2.8 T and the system featured by the wide magnetic poles containing seven magnets have been constructed with use of ST pulse tube coolers in order to expand the feasible application areas. On the other hand, although the bulk magnets are characterized by their steep field distributions, we attempted to gain the uniform magnetic field space, and successfully achieved the uniformity of 385 ppm in 4 mm range by combining the deformed magnetic field profiles which generated between the face-to-face magnetic poles. The performances of these unique systems have exceeded those of the conventional electromagnet or any permanent magnets by far, demonstrating the superiority to other strong magnetic field generators.

本文言語English
ホスト出版物のタイトルHigh-Temperature Superconductors
ホスト出版物のサブタイトルOccurrence, Synthesis and Applications
出版社Nova Science Publishers, Inc.
ページ291-306
ページ数16
ISBN(電子版)9781536133424
ISBN(印刷版)9781536133417
出版ステータスPublished - 2018 1 1
外部発表はい

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

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