TY - JOUR
T1 - Improvement of Trapped Magnetic Field of a REBCO Bulk Magnet Activated by Pulsed Field Magnetization in a High-Cooling Power Two-Stage GM-Type Refrigerator
AU - Yokoyama, Kazuya
AU - Oka, Tetsuo
N1 - Funding Information:
Manuscript received October 30, 2018; accepted January 28, 2019. Date of publication February 4, 2019; date of current version February 26, 2019. This work was supported in part by JSPS KAKENHI under Grant 15K05951. (Corresponding author: Kazuya Yokoyama.) K. Yokoyama is with the Division of Mechanical and Electrical Engineering, Ashikaga Institute of Technology, Ashikaga 326-8558, Japan (e-mail:, k-yokoyama@ashitech.ac.jp). T. Oka is with the Materials Science and Engineering, Shibaura Institute of Technology, Tokyo 135-8548, Japan (e-mail:,okat@sic.shibaura-it.ac.jp). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2019.2897481
Publisher Copyright:
© 2002-2011 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - We developed a high-cooling power bulk magnet system using a 12 K two-stage Gifford-McMahon (GM)-type refrigerator with a cooling ability of 12 W at 20 K in our previous study. When a single pulsed field was applied using a GdBCO bulk, the maximum trapped field of 3.59 T at the center of sample surface and the total magnetic flux of 2.89 mWb were achieved. In this paper, we aim to improve the trapped magnetic field by increasing the size of soft-iron yoke. When the same experiment was carried out using the same bulk, the trapped field was increased to 3.85 T. Moreover, the total magnetic flux reached a value of 3.97 mWb by a multipulsed field magnetization.
AB - We developed a high-cooling power bulk magnet system using a 12 K two-stage Gifford-McMahon (GM)-type refrigerator with a cooling ability of 12 W at 20 K in our previous study. When a single pulsed field was applied using a GdBCO bulk, the maximum trapped field of 3.59 T at the center of sample surface and the total magnetic flux of 2.89 mWb were achieved. In this paper, we aim to improve the trapped magnetic field by increasing the size of soft-iron yoke. When the same experiment was carried out using the same bulk, the trapped field was increased to 3.85 T. Moreover, the total magnetic flux reached a value of 3.97 mWb by a multipulsed field magnetization.
KW - REBCO bulk superconductor
KW - pulsed field magnetization
KW - soft-iron yoke
KW - total magnetic flux
KW - two-stage Gifford-McMahon (GM)-type refrigerator
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U2 - 10.1109/TASC.2019.2897481
DO - 10.1109/TASC.2019.2897481
M3 - Article
AN - SCOPUS:85062888851
SN - 1051-8223
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 5
M1 - 8633979
ER -