Simulation of water pulse forming line switch with prepulse suppression ground plane

The configuration and simulation model of water pulse forming line switch with prepulse suppression ground plane (PPS) were introduced in this paper. The influence of the PPS was analyzed using Pspice. As well as the capacitances between the electrodes or input/output line and PPS (Cpi and Cpo), the inductance (Lp) and capacitance (Cp) of the gaps suppresses the prepulse. The simulation results indicate that the influence of the latter is small. The wave-shapes of the experiment on Flash-II accelerator are compared with that of simulation. It suggests that the equivalent circuit model is feasible in water switch design. Cpi and Cpo of the switch must make certain by adjusting the position of PPS firstly, Lp and Cp of the switch should be as small as possible, and the size of holes on PPS must be suitable. (authors)