DocumentCode :
1074592
Title :
Accurate Calculation of Shielding Current Density in HTS Thin Film
Author :
Kamitani, Atsushi ; Takayama, Teruou ; Ikuno, Soichiro
Author_Institution :
Yamagata Univ., Yamagata
Volume :
17
Issue :
2
fYear :
2007
fDate :
6/1/2007 12:00:00 AM
Firstpage :
3749
Lastpage :
3752
Abstract :
A numerical method has been developed for calculating the shielding current density in a high temperature superconducting (HTS) thin film. When the initial-boundary-value problem of the shielding current density is discretized with respect to time and space, improper integrals appear as coefficients of the nonlinear system. In order to evaluate the coefficients accurately, both the double exponential formula and the Gauss-Legendre formula are applied to the improper integrals. As a result, the shielding current density can be accurately determined even in the thin film. As an application of the method, the contactless method for measuring the critical current density has been investigated numerically. The results of computations show a qualitative agreement with the experimental results.
Keywords :
boundary-value problems; critical current density (superconductivity); electromagnetic shielding; high-temperature superconductors; superconducting thin films; Gauss-Legendre formula; contactless method; critical current density; double exponential formula; high temperature superconducting thin film; improper integrals; initial-boundary-value problem; nonlinear system; shielding current density; Critical current density; Current density; High temperature superconductors; Magnetic films; Nonlinear systems; Permanent magnets; Superconducting films; Superconducting magnets; Superconducting thin films; Transistors; Finite element methods; Newton method; high-temperature superconductors; integration; numerical analysis;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2007.898942
Filename :
4278146
Link To Document :
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