Numerical Investigation of Inductive and Permanent-Magnet Methods to Measure Critical Current Density of HTS Thin Films

被引:2
|
作者
Takayama, T. [1 ]
Kamitani, A. [2 ]
Hattori, K. [2 ]
Saito, A. [2 ]
Ohshima, S. [2 ]
机构
[1] Yamagata Univ, Dept Informat, Fac Engn, Yonezawa, Yamagata 9928510, Japan
[2] Yamagata Univ, Grad Sch Sci & Engn, Yonezawa, Yamagata 9928510, Japan
基金
日本学术振兴会;
关键词
Current distribution; current measurement; numerical analysis; superconducting tapes; SUPERCONDUCTING FILMS;
D O I
10.1109/TASC.2010.2082478
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The inductive method/permanent-magnet method for measuring the critical current density j(c) in a high-temperature superconducting (HTS) tape have been simulated numerically. To this end, a numerical code has been developed for analyzing the time evolution of a shielding current density in an HTS sample. The results of computations show that, in the inductive method, the edge effects lead to the degradation of the j(c)-measurement accuracy. In contrast, it is found that, even if the magnet is placed near the edge, the maximum repulsive force is roughly proportional to j(c). This means that the permanent-magnet method is applicable to measure j(c) near the edge.
引用
收藏
页码:3360 / 3363
页数:4
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