Critical properties of multifilamentary Nb3Sn between 8 and 14 tesla

The multifilamentary NB
3
Sn strand used in the Airco/Westinghouse Large Coil Program was studied for possible direct applicability to the 12 Tesla Coil Program. These studies began with an optimization of the reaction heat treatment to improve the critical current at 12 Tesla. Subsequently the critical surface of a strand heat treated under the optimal conditions was mapped out between 8 and 12 Tesla. The results of these studies are described.