Development and test of a high current density superconducting saddle magnet SSM-3

Following the Stekly\´s work in the direction of development of lightweight superconducting MHD magnets, a relatively large bore (inner diameter of winding 215mm) saddle magnet SSM-3 has been constructed and tested. The wax-filled magnet achieved 1.525ka critical current, about 4.2T central field and 0.35MJ stored energy, i.e about 82% of " short-sample" performance, at this current the stainless steel bolts on the aluminium girders of the support structure were broken and the winding with its epoxy-fiberglass banding remains undamaged.