紧凑型纳秒高压脉冲发生器研制  

Development of a compact generator for nanosecond high-voltage pulses

作　　者：姜占兴 王真[1] 周林[1] 梁川[1] 李名加[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2016年第10期112-116,共5页High Power Laser and Particle Beams

摘　　要：研制了一台紧凑型纳秒高压脉冲发生器。该发生器主要由铁芯变压器、脉冲形成线、油间隙自击穿开关组成。在变压器和形成线之间加入了一个50pF的谐振电容和1.15mH的谐振电感,通过三谐振设计,使发生器在不降低输出电压的情况下,降低了变压器次级绕组的电压,实现了脉冲发生器小型化。对该发生器进行了详细的设计、模拟和实验,结果表明:该发生器可在二极管上输出峰值约500kV、脉宽2.2ns的高压脉冲;电子束二极管产生的X射线在距二极管靶窗20cm处辐射剂量为20mR,可用于辐射探测系统闪烁体的时间响应测量。A compact generator producing a 2.2 ns high-voltage pulse was developed. The pulse was formed by a 27.7 Ω, 0.9 ns pulse forming line （PFL）, which was charged by an iron core transformer with a turn ratio of 2 .＂ 33.5 and a coefficient of 0.94. Meanwhile, an adjustable self-break oil switch was applied. The principle of triple resonance transformation was employed by adding a 50 pF tuning capacitor and a 1.15 mH inductor between the transformer and the PFL, which leaded to a significant reduction of the duration and peak value of the transformer voltage without reducing that in the PFL. By using transmission lines with impedance overmatched to that of the PFL, the generator delivered a peak voltage of up to 500 kV across an electron beam diode, generating radiation with a dose of 20 milliroentgens per pulse at a distance of 20 cm, which provides an excellent ultra- short radiation pulse source for studies on radiation physics.

关 键 词：纳秒 高压 脉冲发生器 三谐振变压器 脉冲形成线 电子束二极管 

分 类 号：TM832[电气工程—高电压与绝缘技术]