介绍了一种基于薄膜介质线的紧凑型脉冲功率源的设计与实验,脉冲功率源系统体积约0.5 m3,输出功率大于4 GW、脉宽约150 ns。该脉冲功率源采用模块化设计,系统主要包括充电组件、薄膜介质线模块和气体火花间隙开关组三个部分。薄膜介质线储能介质为聚酰亚胺薄膜,为抑制电磁耦合以及电晕现象,匝间距选为30 mm。优化设计的三电极场畸变开关直径150 mm、高45 mm、电感值16.2 nH。为降低系统电感,薄膜介质线模块与开关间采用传输线的布线方式,中间绝缘采用聚酰亚胺膜,在2 mm间距下实现了100 kV耐压。

In the paper, a compact pulsed power source based on dielectric line is designed, with the output power more than 4 GW, pulse width 150 ns, and total volume 0.5 m3. The pulsed power source adopts module design, and it is composed of the charring unit, the dielectric line modules and the switches. The energy is stored in Kapton film of the dielectric line. To repress the electromagnetic coupling and take into consideration of the surface insulation, 30 mm is chosen for the distance between two adjacent turns. The height of switch is 45 mm after optimization, with the inductance of which 16.2 nH. In order to decrease the inductance of the system, the connecting electrodes of the dielectric line module are pressed within the switch’s electrode. The insulator within the electrodes is 60 layers of Kapton dielectric film, whose total thickness is 2 mm, but can withstand voltage more than 100 kV.