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

【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 effciency of triggering and guiding HV discharge.更多还原

【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 effciency of triggering and guiding HV discharge.更多还原