New contactless Jc-measurement system for HTS coated conductors

✍ Scribed by S. Ohshima; K. Takeishi; A. Saito; N. Sekiya; S. Hirano; T. Suzuki; Y. Takano; T. Nakamura; M. Yoko; M. Yamada; T. Watanabe

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 314 KB
• Volume: 445-448
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2006.05.004

✦ Synopsis

We have developed a reel-to-reel critical current density (J c ) measurement system based on the permanent magnet method and measured the J c of long stretches of HTS-coated conductor tape. This system has two kinds of measurement mode: a standard mode in which the measurement magnet moves, and a simple mode in which the measurement magnet is fixed. We showed experimentally that the simple mode can measure the J c of coated conductor at 6 m/h and that the standard mode can measure the J c of coated-conductor tape at 0.6 m/h. The measurement result obtained with the simple mode was similar as a result of the standard mode that can estimate the J c of a tape. This means that the system using the simple mode can evaluate the J c of a tape rapidly. This system also distinguishes localized defect like scratches or cracks. These results are promising for in-line evaluation of HTS coated conductors.