Properties of Ti alloyed multifilamentary Nb 3 Sn wires by internal tin process

Influence of Ti addition to the Sn core on the critical current density J c of multlfilamentary Nb 3 Sn wires fabricated by the internal tin process was studied. The addition ( ∼1.5 wt% Ti) improved the values of J c at very high magnetic fields over those for the pure Nb 3 Sn, e.g., J_{c} \sim 140 A/mm2at 18 T. This is 3-4 times greater than a similarly processed pure Nb 3 Sn wire and is within ∼10 % of the highest critical current density measured for the Ti alloyed bronze processed Nb 3 Sn wires.