TY - JOUR
T1 - Enhancement of trapped field of REBCO bulk in a desktop-type magnet system
AU - Yokoyama, K.
AU - Oka, T.
N1 - Publisher Copyright:
© 2019 IOP Publishing Ltd.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2019/12
Y1 - 2019/12
N2 - Wedeveloped a desktop-type bulk magnet system using a Stirling refrigerator and used it to study how to improve the trapped field by pulsed field magnetization (PFM). Although PFM has the advantage that the bulk is activated in a few seconds using an ordinary inexpensive equipment, the amplitude of a trapped field is low as compared with the maximum performance of the material. This paper aims to improve the trapped field by changing the size of soft-iron yoke, which are generally used to extend the pulse width. When a φ60-mm GdBCO bulk was magnetized using φ64-mm and φ80-mm yokes, the maximum flux density and total magnetic flux of large yoke were 13% and 23% higher than those of small one, respectively. Moreover, improvement of trapped field by multi PFM was investigated. When a magnetic field of 5.8 T was applied twice, the maximum trapped field of 1.46 T and the total magnetic flux of 1.86 mWb were achieved.
AB - Wedeveloped a desktop-type bulk magnet system using a Stirling refrigerator and used it to study how to improve the trapped field by pulsed field magnetization (PFM). Although PFM has the advantage that the bulk is activated in a few seconds using an ordinary inexpensive equipment, the amplitude of a trapped field is low as compared with the maximum performance of the material. This paper aims to improve the trapped field by changing the size of soft-iron yoke, which are generally used to extend the pulse width. When a φ60-mm GdBCO bulk was magnetized using φ64-mm and φ80-mm yokes, the maximum flux density and total magnetic flux of large yoke were 13% and 23% higher than those of small one, respectively. Moreover, improvement of trapped field by multi PFM was investigated. When a magnetic field of 5.8 T was applied twice, the maximum trapped field of 1.46 T and the total magnetic flux of 1.86 mWb were achieved.
KW - Pulsed field magnetization
KW - REBCO bulk
KW - Soft-iron yoke
KW - Stirling refrigerator
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U2 - 10.1088/2631-8695/ab5d97
DO - 10.1088/2631-8695/ab5d97
M3 - Article
AN - SCOPUS:85092472692
SN - 2631-8695
VL - 1
JO - Engineering Research Express
JF - Engineering Research Express
IS - 2
M1 - 025053
ER -