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Triggering and guiding of high voltage discharge by using femtosecond laser filaments with different parameters |
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| Authors: | Zhang Zhe Lu Xin Liang Wen-Xi Hao Zuo-Qiang Zhou Mu-Lin Wang Zhao-Hua and Zhang Jie |
| Affiliation: | 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; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, 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. |
| Keywords: | laser filaments HV discharge triggering guiding |
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