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Triggering and guiding of high voltage discharge by using femtosecond laser filaments with different parameters 下载免费PDF全文
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. 相似文献
2.
Laser propulsion with a high specific impulse using a thin film propellant 总被引:1,自引:0,他引:1 下载免费PDF全文
A new laser propulsion scheme with a high specific impulse is proposed in this paper.An extremely thin polyimide film is used as the propellant to eliminate thermal diffusion and sputter from the target material.It is found that a high specific impulse of 1520 s can be achieved at 10 11-W/cm 2 laser intensity because of economic use of the propellant.The influences of the laser intensity and the ablation area on the specific impulse are also studied in the experiment. 相似文献
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