DEVELOPMENT OF NB3SN SUPERCONDUCTING WIRE FOR FUSION APPLICATIONS

Nb3Sn strand for high field fusion magnets has been developed at AISA within the framework of a NET (Next European Torus) contract. The aim of this work is to manufacture by an industrial internal tin process a high critical current density Nb3Sn strand with low losses in pulsed field applications (+/- 3 T). Manufacturing results and wire performan ces are reported in this paper which also includes discussions on the kinetics of bronze formations at different reaction temperatures and o n the possible RRR degradation of the reacted chrome-coated strand.