| 摘要 |
PROBLEM TO BE SOLVED: To enable a stabilized return to superconductivity even in the case where a transition to the normal conductivity is generated by fixing extra fine multi core superconducting wires to the periphery of a stabilizing material with the adhesive agent, which is made of a low-melting point metal, so as to form a primary stranded wire, and stranding plural primary wires so as to form the final twisted wire. SOLUTION: When a normal conductive part is generated in a superconductor 5, a current flowed in an extra fine multi core superconducting wire 2 flows to the stabilizing material 1 at a small specific resistance through a solder 4. (1) In theαpart of the stabilizing material 1, since wire diameter of the stabilizing material 1 is formed large so as to maintain a low specific resistance at an extra low temperature, Joule heating is lowered. (2) In theβpart which is the transition part of the current from the superconducting wire 2 to the stabilizing material 1, since the resistance between the superconducting wire 2 and the stabilizing material 1 is lowered by fixing the superconducting wire 2 with the solder 4, Joule heating is lowered. With these two actions, the Joule heating is restricted at a minimum, and after the thermal agitation is eliminated, the superconductivity is stably reset. |
