Characteristics of laser-induced streamer corona discharge in a needle-to-plate electrode system

The purpose of this study is to understand the development of pulse laser-induced streamers from glow/streamer coronas created in a needle-to-plate electrode system at atmospheric pressure. The effect of the position of laser irradiation against the gap, its energy and the height of laser sheet on the discharge dynamics was investigated experimentally. Time-dependent properties of streamer propagation were observed as well as the trajectories between the gap using an ICCD camera with a few nano-second-order time resolution. It was found that there was a time delay between the laser irradiation and the start of the induced streamer discharge, depending on the position of laser incidence.