Abstract
The trigger to generate high-voltage pulse is one of the most important parts in a pulsed-power system, especially for the conduction characteristics of the main switch. However, traditional triggers usually have the drawbacks of large structure and worse long-term working stability, which goes against the demands of pulsed-power system miniaturization and stability. In the paper, a pulse trigger using photo-conductive semiconductor switch was developed, which is of small size, stable performance and steep leading edge of the output pulse rise. It is found that the output trigger pulse rise time is 14 ns, and the jitter of 20 shots is 330 ps. Applying the designed pulsed trigger in a field distortion switch and a triggered vacuum switch, experiments show that the switches could be triggered stably with reduced jitter.
Highlights
To obtain higher power, people apply the pulse trigger generator to form fast rising-edge pulse as synchronized signals to trigger a number of switches at the same time, which could achieve the pulsedpower system synchronous output and power synthesis
The high voltage pulse generated by the trigger with small capacitor and fast discharge will yield the waveform with rise steep, short delay, and small jitter
The results show that the output delay jitters of the PhotoConductive Semiconductor Switch (PCSS) and the DG standard signal source are very small
Summary
People apply the pulse trigger generator to form fast rising-edge pulse as synchronized signals to trigger a number of switches at the same time, which could achieve the pulsedpower system synchronous output and power synthesis. Some studies have shown that under the condition of 20A per wire, PCSS s life can reach more than 108 times, but under the conditions of 1000 A per wire its life is no more than 10 times.[17] it is difficult for PCSS to replace the high-power gas switch as main switch of a pulse power system directly According to these characteristics, it is possible to combine PCSS into small-capacitor fast-discharge circuit to trigger other main switches. Results showed that when the charging voltage was 25 kV, the rise time of the output pulse was about 12 ns, and the jitter was about 1 ns.[18] In 2015, Ping Jiang et al from the Institute of Fluid Physics, China Academy of Engineering Physics, did the research on the conduction characteristics of the high-pressure gas switch triggered by PCSS. To test the trigger s characteristic, some experiments are carried out to trigger the vacuum switch and field distortion switch
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