Abstract
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.
| Original language | English |
|---|---|
| Title of host publication | High-Temperature Superconductors |
| Subtitle of host publication | Occurrence, Synthesis and Applications |
| Publisher | Nova Science Publishers, Inc. |
| Pages | 291-306 |
| Number of pages | 16 |
| ISBN (Electronic) | 9781536133424 |
| ISBN (Print) | 9781536133417 |
| Publication status | Published - 2018 Jan 1 |
| Externally published | Yes |
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Keywords
- Bulk magnet
- High temperature superconductor
- Magnetic field trapping
- Pulsed field
- Refrigerator
ASJC Scopus subject areas
- Engineering(all)
- Materials Science(all)
Cite this
A review article : Compact magnetic field generators containing HTS bulk magnets cooled by refrigerators and their feasible applications. / Oka, Tetsuo; Ogawa, Jun; Fukui, Satoshi; Sato, Takao; Nakano, Tomohito; Yokoyama, Kazuya; Nakamura, Takashi; Fujishiro, Hiroyuki; Noto, Koshichi.
High-Temperature Superconductors: Occurrence, Synthesis and Applications. Nova Science Publishers, Inc., 2018. p. 291-306.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - A review article
T2 - Compact magnetic field generators containing HTS bulk magnets cooled by refrigerators and their feasible applications
AU - Oka, Tetsuo
AU - Ogawa, Jun
AU - Fukui, Satoshi
AU - Sato, Takao
AU - Nakano, Tomohito
AU - Yokoyama, Kazuya
AU - Nakamura, Takashi
AU - Fujishiro, Hiroyuki
AU - Noto, Koshichi
PY - 2018/1/1
Y1 - 2018/1/1
N2 - 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.
AB - 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.
KW - Bulk magnet
KW - High temperature superconductor
KW - Magnetic field trapping
KW - Pulsed field
KW - Refrigerator
UR - http://www.scopus.com/inward/record.url?scp=85048390628&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85048390628&partnerID=8YFLogxK
M3 - Chapter
AN - SCOPUS:85048390628
SN - 9781536133417
SP - 291
EP - 306
BT - High-Temperature Superconductors
PB - Nova Science Publishers, Inc.
ER -