高电压长寿命型气体火花开关的设计及初步研究

Design and primary experiment of high voltage long-life gas spark switch

根据强流电子加速器的需要，研制了一种高电压长寿命两电极气体开关。该开关采用防污染设计，将开关电极与金属腔体进行一体化设计，并采用金属挡板对绝缘封盖进行防污保护，从最大程度上减小了开关工作时电极材料喷射对绝缘支撑物的污染，提高了开关寿命。运用ANSYS软件优化设计了电极结构。该开关在0．1～0．2MPa气压条件下，工作电压为32～42kV，单次脉冲电荷转换量0．38～0．48C，工作稳定。

For the need of intense current electron accelerator, a high voltage, long life gas spark switch was designed. An ti-pollution design is used in the switch, the outer housing of the switch is made of Cu and a metal baffle is used to prevent the top plate from pollution. These measures can prevent arc form approaching the insulated bracket as far as possible and increase the life oi the switch. And the electrode structure is optimized with electromagnetic simulation software. The experimental results indi eate that the operating voltage is 32-42 kV and charge transfer is about 0.38-0.48 C per pulse at 0.1-0.2 MPa pressure, and the switch works stably and reliably.