Current Distribution Measurement of YBCO Thin Film for Superconducting Fault Current Limiter
イットリウム系高温超電導薄膜限流素子の電流分布測定

Kenji SHIMOHATA, Shouichi YOKOYAMA, Takashi INAGUCHI, Shiro NAKAMURA, Yasuo OZAWA
2002 TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)  
Synopsis: Current distribution in the superconducting film for a resistive fault current limiter is important because it influences AC loss and a uniformity of S/N transition. The lateral current distribution of the film was reconstructed from the magnetic field distribution, which is measured by multiple Hall probes. The following results were obtained. (1) Non-uniform current distribution in the superconducting film was observed when the current was less than 1.3times critical current (Ic). (
more » ... 2 ) The current in a superconducting film was uniform when the current was much higher than Ic. The current can be considered uniform when the film works as a fault current limiter because the S/N transition starts at about twice Ic. (3) The validity of the measurement was verified by the comparison with the electric circuit simulation.
doi:10.2221/jcsj.37.410 fatcat:wco6edcn6rgr5armernqyyt2n4