A 300 kJ pulsed superconducting energy storage coil

Magnetic Corporation of America has designed and is presently building a 300 kJ superconducting pulsed energy storage coil. The coil is a solenoid and will operate at a central flux density of 2.0 Wb/m²and a current of 10 kA. The critical current as measured by extrapolation along the peak field load line is 15 kA. The structure which is completely non-conducting has been designed mechanically so that the coil may be operated at 12 KA. The windings are partially potted and are cooled on one face of the braid. It has been designed to remain superconducting throughout the 10 s charge period and the 2 ms discharge period. The repetition period is 30 s.