Enhancement of bending strain tolerance and current carrying property of MgB2 based multifilamentary wires

Evaluation of a solid nitrogen impregnated MgB2 racetrack coil

“…To achieve high performance, several improvements were made in this work compared to our previous work. Firstly, in order to improve the strain tolerance and to avoid mismatch of the thermal expansion coefficient of the epoxy resin with that of the MgB2 wire, in this work, we used multifilament wire without any epoxy impregnation[50].Secondly, the coil fabrication process was optimized such that no conductor movement took place after heat treatment of the coil. The racetrack coil in this work was impregnated using only SN2.…”