超伝導材料の特性評価技術の開発 ／ Diagnostic Tech. for Supercond. Materials
超伝導線材は損失をほとんど無視できる状態で、銅線の１００倍以上の大電流を流すことができます。 本研究では、超伝導材料の局所的な電磁現象を可視化する様々な計測手法の開発によって、電流制限因子を明らかとし、 高性能超伝導材料の開発支援や計測評価技術の標準化によって、超伝導産業応用の基盤を確立することを目指しています。 これまでに、高磁場下におけるイットリウム系線材の損失分布の可視化やリール式システムを用いた長尺高温超伝導線材の 面内分布計測に世界ではじめて成功しています。
Superconducting wires can carry more than 100 times larger current than that in conventional normal conductors such as Cu and Al with almost no dissipation. Our purpose is to resolve key performance issues of advanced superconducting materials and to establish fundamental technologies for industrial superconducting power applications by the development of novel diagnostic technologies for the study of current limiting mechanism of superconducting materials. For example, we have succeeded in visualizing in-field local dissipation in YBCO coated conductors by the low temperature scanning laser microscopy. Reel-to-reel scanning Hall probe microscope system also enables continuous measurements of 2-dimensional critical current distribution in long HTS tapes in hundreds meter scale for the first time.
Novel measurement technologies for the study on current limiting mechanism in fore front superconducting tapes