Development of fast shutter for diagnosis system in Z-pinch experiment

The debris or splashing mass will be produced by Z-pinch loads after the stagnation phase in Z-pinch experiments. The debris can arrive at the diagnosis devices and cause pollution to the optic units. In this paper, a kind of fast shutter based on the principle of electromagnetic induction was developed. The velocity, the discharge current and the shut-down time of fast shutter were analyzed based on the energy conservation principle and circuit model. The experimental results show that the velocity of fast shutter is nearly 19 m/s and the jitter of shut-down time is 85 μs. These experimental data show a good agreement with the calculation results. (authors)