PCSS-type V/N gas switch for trigger of Marx generator
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摘要: 随着高功率微波合成技术的发展，高功率微波脉冲驱动源的轻小型化和精确触发的需求进一步提升。高功率Marx脉冲驱动源在轻小型方面优势显著，难点在于精确触发。为解决基于气体开关的Marx驱动源存在的触发难度大的技术问题，本文开展了光导开关型V/n气体开关对Marx驱动源的触发研究，旨在重复频率条件下，实现Marx驱动源小于2 ns的触发时延抖动。首先，理论分析了基于2级该型触发开关的Marx脉冲驱动源实现ns级精确触发的可行性，进一步，开展了电路仿真和实验验证。仿真结果显示，两级该触发开关的Marx脉冲驱动源的触发时延抖动小于2 ns，达到了理论预期。研制了基于光导开关型V/n气体开关的四级PFL-Marx脉冲驱动源，在10 Hz 100脉冲下，触发时延抖动仅为1.3 ns。研究结果表明，基于研制触发开关的Marx驱动源可以实现ns触发时延抖动。相关研究为高功率Marx驱动源的精确触发和功率合成提供了可行的技术手段。Abstract:
Background With the development of high power microwave combining technology, light miniaturization and precise triggering become the important development direction of high power pulse generator. High-power Marx pulse generator has obvious advantages in light miniaturization. Precise triggering is the next research focus.Purpose In order to solve the difficulty of Marx pulse generator based on gas switch in synchronization, the photoconductive semiconductor switch(PCSS) type V/n trigger gas switch for trigger of Marx generator is studied in this paper, aiming to realize the trigger delay jitter of the Marx pulse generator less than 2 ns under the condition of repetition frequency.Methods First of all, the feasibility of precise triggering of Marx pulse generator based on 2 stage of PCSS type V/n gas switch is analyzed theoretically, then circuit simulation and experimental verification are carried out.Results The circuit simulation results show that the Marx pulse generator based on the two-stage proposed trigger switch can acquire a trigger delay jitter less than 2 ns, which conforms to the theoretic analysis. A four-stage PFL-Marx pulse generator based on 2 stage of PCSS type V/n gas switch is developed. Test result shows that the developed Marx generator has a trigger delay jitter of 1.3 ns at 10Hz/100 pulses.Conclusion The results show that the PCSS type V/n gas switch can realize a trigger delay jitter of nanosecond range of Marx pulse generator. The research in this paper provided a feasible technical means for the precise trigger and power combination of high power Marx pulse generator.-
Key words:
- triggered gas switch /
- synchronous trigger /
- V/N-type gas switch /
- Marx generator
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图 5 两级V/n气体开关各间隙上的仿真电压波形
Figure 5. the simulation voltage waveform on gaps of two stages of V/n gas switches
图 6 两级V/n开关击穿电压差异较大时各间隙对应仿真波形
Figure 6. Simulation waveforms on each gap when the breakdown voltage of the two-stage V/n switch varies greatly
图 8 用于触发实验的四级Marx-PFL驱动源结构示意图
Figure 8. Structural schematic of the 4-stage Marx-PFL Generator
图 9 Marx驱动源充电电压波形(10 Hz 100 pulses)
Figure 9. the charging voltage waveform of the Marx generator (10 Hz 100 pulses)
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