Superconducting wire with small filaments for SSC magnets

In order to achieve the highest field performance for SSC magnets, superconducting wires with small filaments have been required. Superconducting wires with filament size of 1 about3 microns having excellent critical current densities have been already developed. For instance, a NbTi alloy superconducting wire with a filament size of about five micron achieved Jc about2.8 X 105 A/cm2 at 5T and 4.2K. A Nb3Sn compound superconducting wire with a filament size of about one micron also performed Jc about2.3 X 105 A/cm2 at 8T and 4.2K. This paper attempts to clarify and propose standard Nb-50 wt% Ti alloy and multifilamentary bronze Nb3Sn configurations of interest to SSC magnet desigenres