Progress with Nb3Sn conductors at Oxford Instruments, Superconducting Technology

Oxford Instruments, Superconducting Technology (OI-ST) produces Nb3Sn wires by two major process routes: bronze and internal Sn, including modified je lly roll (MJR), Each process has its own strengths for particular applicati ons. We report on MJR wire designed for prototype high energy physics accel erator magnet studies which achieved short sample non-Cu critical current d ensity at 12 T, 4.2 K exceeding 2000 A/mm(2). We also report recent results from wires fabricated by other internal Sn methods, the bronze process, an d powder-in-tube processes.