Development of a Nb3Sn multifilamentary wire for accelerator magnet applications
01 May 2001
CEA/Saclay and Alstom/MSA have carried out a program to develop a Nb3Sn multifilamentary wire for accelerator magnet applications relying on the internal-tin process. The main wire specifications are: an overall diameter of 0.825 mm, a critical current larger than 405 A at 4.2 K and 7 T, hysteresis losses lower than 450 mJ/cm(3) for a +/- 3 T trapezoidal cycle, and a copper-to-non-copper ratio greater than 1. The last phase of the optimization program was based on four different strands and we present here the results of the characterization tests, including residual resistivity ratio, critical current and AC loss measurements. (C) 2001 Elsevier Science B.V. All rights reserved.