Simulation of runaway electron inception and breakdown in nanosecond pulse gas discharges
| Autor: | Ping Yan, Ruexue Wang, Cheng Zhang, Tao Shao, Jianwei Gu, Hao Ma |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Materials science Runaway breakdown Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas Pulse (physics) Electric discharge in gases Electron avalanche Electric field Rise time 0103 physical sciences Electrical and Electronic Engineering Atomic physics Ultrashort pulse Voltage |
| Zdroj: | Laser and Particle Beams. 34:43-52 |
| ISSN: | 1469-803X 0263-0346 |
| DOI: | 10.1017/s0263034615000944 |
| Popis: | Nanosecond pulse discharges can provide high reduced electric field for exciting high-energy electrons, and the ultrafast rising time of the applied pulse can effectively suppress the generation of spark streamer and produce homogeneous discharges preionized by runaway electrons in atmospheric-pressure air. In this paper, the electrostatic field in a tube-plate electrodes gap is calculated using a calculation software. Furthermore, a simple physical model of nanosecond pulse discharges is established to investigate the behavior of the runaway electrons during the nanosecond pulse discharges with a rise time of 1.6 ns and a full-width at half-maximum of 3–5 ns in air. The physical model is coded by a numerical software, and then the runaway electrons and electron avalanche are investigated under different conditions. The simulated results show that the applied voltage, voltage polarity, and gas pressure can significantly affect the formation of the avalanche and the behavior of the runaway electrons. The inception time of runaway breakdown decreases when the applied voltage increases. In addition, the threshold voltage of runaway breakdown has a minimum value (10 kPa) with the variation of gas pressure.PACS: 52.80.-s |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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