CURRENT LEAD FOR SUPERCONDUCTIVE DEVICE

PROBLEM TO BE SOLVED: To provide a current lead for a superconductive device where the quantity of penetrated heat is reduced effectively by increasing the effective length of a conductor on low temperature side using an oxide superconductor. SOLUTION: A conductor on low temperature side connected conductively through a middle connector 15 to the conductor on high temperature side consisting of well conductive metal is made a long conductor composed of conductor elements 20A and 20B consisting of two pieces of oxide superconductors connected conductively in series through the connecting conductor 21 supported by an outer cylinder. And, as for the connecting conductor 21, a bundle of superconductive lead wires consisting of oxide superconductors are arranged for the conductive member 21A consisting of well conductive metal so as to minimize the generated joule's heat.