中国物理B ›› 2009, Vol. 18 ›› Issue (3): 1136-1140.doi: 10.1088/1674-1056/18/3/049

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Triggering and guiding of high voltage discharge by using femtosecond laser filaments with different parameters

张杰1, 张喆2, 鲁欣2, 梁文锡2, 郝作强2, 周木林2, 王兆华2   

  1. (1)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing 100190, China;Department of Physics, Shanghai Jiao Tong University,Shanghai 200240, China; (2)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2008-05-26 修回日期:2008-06-13 出版日期:2009-03-20 发布日期:2009-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10734130, 10634020, 60621063) and National Basic Research Programme of China (Gant No 2007CB815101).

Triggering and guiding of high voltage discharge by using femtosecond laser filaments with different parameters

Zhang Zhe(张喆)a), Lu Xin(鲁欣)a), Liang Wen-Xi(梁文锡)a), Hao Zuo-Qiang(郝作强)a), Zhou Mu-Lin(周木林)a), Wang Zhao-Hua(王兆华)a), and Zhang Jie(张杰)a)b)†   

  1. a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; b Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2008-05-26 Revised:2008-06-13 Online:2009-03-20 Published:2009-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10734130, 10634020, 60621063) and National Basic Research Programme of China (Gant No 2007CB815101).

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摘要： This paper demonstrates the triggering and guiding of the stationary high voltage (HV) discharges at 5--40 kV by using plasma filaments generated by femtosecond laser pulses in air. A significant reduction of the breakdown voltage threshold due to the pre-ionization of the air gap by laser filamentation is observed. The discharge experiments are performed by using laser pulses with different energy from 15--60 mJ. The electron density of filaments is detected by sonography method. The influence of the electron density of laser filaments on the triggering and guiding HV discharge is experimentally investigated. The results have shown that the behaviour of plasma filaments can strongly affect the efficiency of triggering and guiding HV discharge.

关键词: laser filaments, HV discharge, triggering, guiding

Abstract: This paper demonstrates the triggering and guiding of the stationary high voltage (HV) discharges at 5--40 kV by using plasma filaments generated by femtosecond laser pulses in air. A significant reduction of the breakdown voltage threshold due to the pre-ionization of the air gap by laser filamentation is observed. The discharge experiments are performed by using laser pulses with different energy from 15--60 mJ. The electron density of filaments is detected by sonography method. The influence of the electron density of laser filaments on the triggering and guiding HV discharge is experimentally investigated. The results have shown that the behaviour of plasma filaments can strongly affect the efficiency of triggering and guiding HV discharge.

Key words: laser filaments, HV discharge, triggering, guiding

中图分类号:  (Self-focussing, channeling, and filamentation in plasmas)

  • 52.38.Hb
52.80.-s (Electric discharges)