| 摘要 |
PROBLEM TO BE SOLVED: To turn a permanent current switch on/off at high speed with a small heat input.SOLUTION: In a conduction cooling permanent current switch including a superconducting wire rod 1 for conducting a current, a cooling stage 9 for cooling the superconducting wire rod, and a heater 8 for heating the superconducting wire rod, the superconducting wire rod is placed between the cooling stage and each surface formed by the heater, the core of the superconducting wire rod is composed of magnesium diboride 6, and a base metal 5 placed on the outer periphery of the core is a material having a resistivity of 10 μ&OHgr;cm or more at 40K. |
