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50 pF的谐振电容和1.15 mH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500 kV、脉宽2.2 ns的高压脉冲; 电子束二极管产生的X射线在距二极管靶窗20 cm处辐射剂量为20 mR, 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.