| 摘要 |
PURPOSE:To obtain a product which is small-sized, where a heat capacity of a heating element can be made small and which does not exert a bad influence on a magnetic field of a superconducting coil irrespective of a type of a stabilization material by a method wherein a superconductor filament part to be heated is formed of a naked wire from which the stabilization material has been removed. CONSTITUTION:In a persistent-current switch used to switch a normal conducting state to a superconducting state or inversely by heating a superconductor filament constituting a closed circuit together with a superconducting coil, said filament part to be heated is formed of a naked wire from which a stabilization material has been removed. For example, a stabilization material 10 is removed over its prescribed length in a prescribed part of a superconducting wire 1 constituted by filling many superconductor filaments 11 into the stabilization material 10; then, the superconductor filaments 11 are exposed. Then, an exposed part of the superconductor filaments 11 is wound on a heating element 13 such as a resistance or the like having a noninductive film; the heating element 13 is sheatherd with a hollow pipe 15 so as to wrap also lead wires 14 for the heating element 13; in this state, this assembly is united by using a filler 16. |
