直流電場中でのCO₂レーザによるプラズマ生成と放電誘導特性

抄録

The experiments of a laser-induced discharge were carried out with CO₂ laser radiation in the atmospheric ambient gases under a DC electric field. In these experiments, induced-discharge and plasma production due to the laser breakdown were suppressed with an increasing DC electric field strength. Although the laser-produced plasma was generated between the electrodes without DC electric field, both the probability of induced-discharge and plasma production decreased with the applied voltage across the electrodes. In this paper, the mechanisms of the phenomena that suppress the plasma production under applying the electric field between electrodes were discussed. It is found that the attachment processes of electrons most likely play an important role in this phenomena.