Scaling of the V-I characteristics in the ITER type Nb/sub 3/Sn strands in relation to the applied field and temperature

摘要

A description of voltage-current characteristics VCC (T,B) is presented in this paper. To describe an experimental VCC (T,B) database of ITER Nb/sub 3/Sn strands a relation is used containing four fitting parameters. Three parameters, namely: C, T/sub cm/ (0), and H/sub cm/ (0) describe I/sub C/(T,B) and one additional parameter characterizes the smoothness of the transition. The question is considered on the accuracy of measurement of the T, B, and I values needed to determine the fitting parameters accurately.