中国物理B ›› 2015, Vol. 24 ›› Issue (10): 105102-105102.doi: 10.1088/1674-1056/24/10/105102

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Effect of microwave frequency on plasma formation in air breakdown at atmospheric pressure

赵朋程, 郭立新, 李慧敏   

  1. School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China
  • 收稿日期:2015-01-20 修回日期:2015-04-13 出版日期:2015-10-05 发布日期:2015-10-05
  • 基金资助:
    Project supported by the Fundamental Research Funds for the Central Universities, China and the National Natural Science Foundation of China (Grant No. 61501358).

Effect of microwave frequency on plasma formation in air breakdown at atmospheric pressure

Zhao Peng-Cheng (赵朋程), Guo Li-Xin (郭立新), Li Hui-Min (李慧敏)   

  1. School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China
  • Received:2015-01-20 Revised:2015-04-13 Online:2015-10-05 Published:2015-10-05
  • Contact: Zhao Peng-Cheng E-mail:pczhao@xidian.edu.cn
  • Supported by:
    Project supported by the Fundamental Research Funds for the Central Universities, China and the National Natural Science Foundation of China (Grant No. 61501358).

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摘要： Microwave breakdown at atmospheric pressure causes the formation of a discrete plasma structure. The one-dimensional fluid model coupling Maxwell equations with plasma fluid equations is used to study the effect of the microwave frequency on the formation of air plasma. Simulation results show that, the filamentary plasma array propagating toward the microwave source is formed at different microwave frequencies. As the microwave frequency decreases, the ratio of the distance between two adjacent plasma filaments to the corresponding wavelength remains almost unchanged (on the order of 1/4), while the plasma front propagates more slowly due to the increase in the formation time of the new plasma filament.

关键词: microwave frequency, plasma formation, air breakdown, electron fluid model

Abstract: Microwave breakdown at atmospheric pressure causes the formation of a discrete plasma structure. The one-dimensional fluid model coupling Maxwell equations with plasma fluid equations is used to study the effect of the microwave frequency on the formation of air plasma. Simulation results show that, the filamentary plasma array propagating toward the microwave source is formed at different microwave frequencies. As the microwave frequency decreases, the ratio of the distance between two adjacent plasma filaments to the corresponding wavelength remains almost unchanged (on the order of 1/4), while the plasma front propagates more slowly due to the increase in the formation time of the new plasma filament.

Key words: microwave frequency, plasma formation, air breakdown, electron fluid model

中图分类号:  (Electrical properties)

  • 51.50.+v
52.80.Pi (High-frequency and RF discharges) 52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))