Experimental study of multi-stage and multi-channel closing switch

A new multi-stage and multi-channel closing switch (MMCS) was designed for main switch of Flash-II accelerator. The synchronization of three MMCS is important in operation, thus the characteristic of MMCS should be consistency. According to Bradley experiential formula, parameter setup of MMCS was acquired from the experiment in low-voltage condition on Flash-II. In the condition of trigger pulse voltage 85 kV, closure voltage 1.0-2.0 MV, the working state of MMCS was stable and reliable in operation. At the same time, property data of MMCS were acquired, the delay time of MMCS was less than 100 ns, the jitter was 8 ns, the breakdown time among the three MMCS was less than 10 ns.