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)†
a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; bDepartment of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
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.
Received: 26 May 2008
Revised: 13 June 2008
Accepted manuscript online:
PACS:
52.38.Hb
(Self-focussing, channeling, and filamentation in plasmas)
Fund: 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).
Cite this article:
Zhang Zhe(张喆), Lu Xin(鲁欣), Liang Wen-Xi(梁文锡), Hao Zuo-Qiang(郝作强), Zhou Mu-Lin(周木林), Wang Zhao-Hua(王兆华), and Zhang Jie(张杰) Triggering and guiding of high voltage discharge by using femtosecond laser filaments with different parameters 2009 Chin. Phys. B 18 1136
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