Improvements of ’’i n s i t u’’ multifilamentary Nb3Sn superconducting wires

Abstract
’’In situ’’ multifilamentary Nb3Sn wires with improved high‐field properties are reported. An overall critical current density greater than 104 A/cm3 is achieved at 14 T for a Cu–36 wt%–Nb–20 wt% Sn material. The results are comparable to the best reported commercial multifilamentary Nb3Sn materials.