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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (1): 14009-014009.doi: 10.1088/2058-6272/aa8cbe

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

Analysis on discharge process of a plasma-jet trigered gas spark switch

Weihao TIE (铁维昊)1,2,5, Cui MENG (孟萃)1,5, Yuting ZHANG (张雨婷)3, Zirang YAN (闫自让)2 and Qiaogen ZHANG (张乔根)4   

  1. 1 Department of Engineering Physics, Tsinghua University, Beijing 100084, People’s Republic of China
    2 Xi’an Electronic Engineering Research Institute, Xi’an 710100, People’s Republic of China
    3 Aviation Key Laboratory of Science and Technology on Aerospace Power System, Xi’an 710077, People’s Republic of China
    4 School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
  • 出版日期:2017-12-04 发布日期:2017-12-07

Analysis on discharge process of a plasma-jet trigered gas spark switch

ihao TIE (铁维昊)1,2,5, Cui MENG (孟萃)1,5, Yuting ZHANG (张雨婷)3, Zirang YAN (闫自让)2 and Qiaogen ZHANG (张乔根)4   

  1. 1 Department of Engineering Physics, Tsinghua University, Beijing 100084, People’s Republic of China
    2 Xi’an Electronic Engineering Research Institute, Xi’an 710100, People’s Republic of China
    3 Aviation Key Laboratory of Science and Technology on Aerospace Power System, Xi’an 710077, People’s Republic of China
    4 School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
  • Online:2017-12-04 Published:2017-12-07

Abstract:

The plasma-jet triggered gas switch (PJTGS) could operate at a low working coefficient with a low jitter. We observed and analyzed the discharge process of the PJTGS at the lowest working coefficient of 47% with the trigger voltage of 40 kV and the pulse energy of 2 J to evaluate the effect  of the plasma jet. The temporal and spatial evolution and the optical emission spectrum of the plasma jet were captured. And the spraying delay time and outlet velocity under different gas pressures were investigated. In addition, the particle in cell with Monte Carlo collision was employed to obtain the particle distribution of the plasma jet varying with time. The results show that, the plasma jet generated by spark discharge is sprayed into a spark gap within tens of nanoseconds, and its outlet velocity could reach 104ms−1. The plasma jet plays a non-penetrating inducing role in the triggered discharge process of the PJTGS. On the one hand, the plasma jet provides the initial electrons needed by the discharge; on the other hand, a large number of electrons focusing on the head of the plasma jet distort the electric field between the head of the plasma jet and the opposite electrode. Therefore, a fast discharge originated from the plasma jet is induced and quickly bridges two electrodes.

Key words: spark gap, plasma jet, triggered discharge

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