Plasma and Fusion Research
Volume 9, 3401129 (2014)
Regular Articles
- Yamagata University, 4-3-16 Johnan, Yonezawa, Yamagata 992-8510, Japan
- 1)
- Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
- 2)
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
Abstract
The inductive method for measuring the critical current density in a high-temperature superconducting (HTS) film has been reproduced numerically. To this end, a numerical code has been developed for analyzing the time evolution of a shielding current density in an HTS film containing a crack. The of computational results show that the accuracy of the inductive method monotonously increases with the height of the coil. In addition, the accuracy is slightly improved by changing the inner radius of the coil, and there exists the optimum inner radius. Although the accuracy is degraded due to the crack, this result means that the inductive method can be applied to the crack detection. Consequently, the crack located near the film edge cannot be detected with high accuracy because the crack is treated the same as the film edge.
Keywords
critical current density, crack detection, high-temperature superconductor, inductive method, numerical simulation
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References
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This paper may be cited as follows:
Teruou TAKAYAMA, Atsushi KAMITANI, Soichiro IKUNO and Hiroaki NAKAMURA, Plasma Fusion Res. 9, 3401129 (2014).