The first model of the shielded pulsed superconductive energy storage

The first model of the shielded pulsed energy storage was designed and constructed to test the effectiveness, the construction problems, and the scaling problems. The stored energy is 200 kJ, and its available energy is designed as 50 kJ at the transfer time less than 50 ms. The shield coil is distributed arround the superconductive coil in a simple form for easy construction. The measurement of the leakage field showed that the simplified distribution of the shield coil was available. The dewar was constructed to have a wall as thin as possible with small heat leak by using GFRP supports. The design value of heat leak agreed well with the measurement. The current of 80 % of the design value was obtained by the first preliminary test with three quenchings.