DEVELOPMENT OF HIGH-STRENGTH NB3SN CONDUCTORS FOR HIGH MAGNETIC-FIELDAPPLICATIONS

Multifilamentary (Nb,Ti)(3)Sn superconducting wires with reinforcing s tabilizer of CuNb composite, CuNb/(Nb,Ti)(3)Sn, were developed. Previo usly, we researched on the effect of reinforcement of CuNb composite a s a CuNb/(Nb,Ti)(3) wire and its stability by investigating the MQE(mi nimum quench energy). A test coil was fabricated using this reinforced wire without extra reinforcing material. The coil was produced by the ''react and wind method'', then electromagnetic force for the wire If as applied by charging electric current in the coil up to 11 T. The c oil was energized successfully and the generated electromagnetic force for the wire reached 224 MPa at 136 A and 9 T without any degradation of test coil. These results proved that the bronze processed multifil amentary CuNb/(Nb,Ti)(3)Sn have an excellent mechanical property, and a possibility to realize compact design of future superconducting magn et was confirmed.