Shielding current analysis by current-vector-potential method: Application to HTS film with multiply-connected structure

被引：7
作者：
Kamitani, A. [1 ]
Takayama, T. [1 ]
Ikuno, S. [2 ]
机构：
[1] Yamagata Univ, Yonezawa, Yamagata 9928510, Japan
[2] Tokyo Univ Technol, Hachioji, Tokyo 1920982, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2013年 / 494卷
基金：
日本学术振兴会;
关键词：
Critical currents; Cuprates; Superconducting films; CRITICAL-CURRENT-DENSITY; SUPERCONDUCTING FILMS; PERMANENT-MAGNET; TEMPERATURE; FIELD;
D O I：
10.1016/j.physc.2013.04.066
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The performance of the virtual voltage method is compared with that of the conventional method in which integral forms of Faraday's law along crack surfaces are treated as natural boundary conditions. As a result, it is found that there is a significant difference between numerical solutions by the two methods. In this sense, not the conventional method but the virtual voltage method should be employed to the shielding current analysis in a high-temperature superconducting film with cracks. By means of the virtual voltage method, the influence of a crack on the inductive method is investigated numerically. The results of computations show that, if the threshold current changes remarkably from its ambient value, a part of a crack is contained in the projection of the field-generating coil onto the film surface. Furthermore, the applicability of the inductive method to the crack detection is investigated numerically. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：168 / 172
页数：5
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