1969 年 4 巻 3 号 p. 138-142
Minimum propagation current (Ip) and V-I characteristics were investigated for composite Nb-Ti superconducting wire (10mil in dia) claded by two methods; electro plating and metallurgical bonding. The dependence of Ip and V-I characteristics on thickness of copper was measured. Experimental results were discussed by heat transfer between liq. He and composite superconducting wire.