COMPOSITE SUPERCONDUCTOR AND SUPERCONDUCTING COIL

摘要

PURPOSE:To lower the composite specific resistance at very low temperatures of a composite material having high purity aluminum as a stabilizer. CONSTITUTION:A composite superconductor 20 is formed by joining a superconducting wire 10 and a composite material 21 together using solder 15, the composite material 21 comprising a tape-shaped copper member 12 joined to the broad surface of high purity aluminum 11 of rectangular cross section. When in use the composite superconductor 20 is disposed with the broad surface of the high purity aluminum 11 being parallel to an external magnetic field H. By disposing the composite superconductor in this way the composite specific resistance of the composite material 21 can be reduced significantly and the specific resistance of the whole conductor can be approximated to that of the high purity aluminum.