Thirteen tesla magnet constructed with MJR wire

We have constructed an insert booster superconducting magnet of 20 mm clear bore and outside diamener of 100 mm and height 130 mm, wound and reacted from the Teledyne patented foraminous layered foil (jelly roll) wire fabricated by low cost, non-rebundled reduction to wire. This magnet was placed inside the 101 mm bore of a NbTi wound solenoid which was operated at 8.5 Tesla. The total field achieved was 13.0 Tesla with no training quench observed; although training was initially observed when the magnet was first tested alone up to 4.6 Tesla at American Magnets, Inc. (AMI). The magnet winding techniques utilize Airco´s fiberglass type wire insulation, an AMI proprietary cement, argon atmosphere 700°C for 100 hour reaction, followed by a post-reaction potting impregnation. The MJR wire lot used (M22) was short sample tested and the Ln (Jc) -vs-H line intersected the insert magnet operating curve at 13.5 Tesla. The wire lot used has a 34 volume % copper external sheath for quench protection. The wire was fabricated with 15.4 volume % niobium and bronze/niobium ratio of 3.0 with 13.% Sn bronze.