设计了一种辉光放电触发双级赝火花开关, 主要是阴阳电极、中间栅极和辉光放电腔的设计。通过增加中间栅极, 构成双级结构, 选用平板形结构, 板厚1.5 mm, 栅极孔尺寸1 mm, 三个栅孔均匀分布在直径5 mm的圆环上。辉光放电腔设计工作区域为Paschen曲线最低点左侧, 具有放电电流大、触发电压低等特点。实验表明: 双级赝火花开关需采用RC外均压电路, 使阳极电压在两间隙中均匀分配。在充电1~57 kV条件下, 开关均能可靠触发导通。当阳极充电57 kV时, 在50 Ω负载上获得了约56 kV、抖动1.4 ns的输出。

In order to enhance the working voltage of pseudospark switch, a two-staged pseudospark switch triggered by glow discharge is designed. The design of the switch is comprised of the anode, cathode, grid electrode and glow discharge cavity. The two-staged pseudospark switch is formed by adopting middle grid electrode. The middle grid electrode uses a flat plate, with a thickness of 1.5 mm. The grid holes with a size of 1 mm each are distributed on a ring with a diameter of 5 mm. The glow discharge cavity is devised to work on the left region of Paschen curve, with the characteristics of large discharge current and low trigger voltage. Experiment shows that the RC voltage even assignment is needed for the switch and it can make the anode voltage divide equally in the two gaps. Then the switch can be triggered reliably with the anode voltage from 1 kV to 57 kV. When the anode is charged to 57 kV, the output voltage on the 50 Ω resistor load is 56 kV, and the jitter is about 1.4ns.