Thermal Stability of Ag/Bi-2212 Tape at Cryocooled Condition.

作者：T. Seto, S. Murase, S. Shimamoto, Satoshi Awaji, Michiya Okada, Kazuo Watanabe · 发表于：TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) · 年份：2001 · DOI：10.2221/jcsj.36.60 · 被引用次数：13 · 研究领域：Physics of Superconductivity and Magnetism、Heat Transfer and Optimization、Heat Transfer and Boiling Studies

Thermal runaway properties of Ag/Bi-2212 tape cooled by a cryocooler have been studied experimentally under the condition of magnetic fields up to 15T at 4K. To investigate the stability of the tape, Joule heating and a sample temperature were measured as a function of time at a fixed operating current. As a result, if cooling capacities are higher than Joule heating, it is found that thermal runaway current, Itr, is higher than critical current, Ic, which is defined by 1μV/cm. Furthermore, MRE (Minimum Runaway Energy) was measured as a function of operating current ratio, Iop/Itr, and the magnetic fields. The MRE decreased with increasing magnetic field in the same operating current ratio.