Study of a high-Tc superconducting magnet made with Bi-2212/AgRutherford cable

摘要

A high temperature superconducting magnet using newly developed Bi-2212/Ag Rutherford cable was trial manufactured as a partial model for a 10 T magnet. The developed magnet consists of 4 double pancake coils constructed from a Rutherford cable with a critical current of 3.5 kA at 4.2 K, 0 T. The magnet has inside and outside diameters of 100 mm and 180 mm, respectively and is 75 mm long axially. The coil successfully operated with DC 1.25 kA and 1.5 kJ was stored stably. A maximum magnetic field of 2 T with A current of 1.47 kA was confirmed in liquid helium. Also, the authors performed excitation tests under the high-speed rate of change of magnetic field (0.54 T/S) and 300 cycles simulating alternating operation, and estimated the value of AC losses at 5.3 W using the change of liquid helium level