Study on Light Emission of Arcing Before Arcing Explosion in a Low-Temperature Plasma

Although arcing is a ubiquitous phenomenon and one of the most critical issues in low-temperature plasma engineering, its mechanism has not been fully understood yet. To elucidate its mechanism, we investigated light emission of arcing in the initiation phase with an ultra-fast high-speed camera. As arcing occurs randomly in space, we employed an arcing inducing probe (AIP) designed to localized arcing on its probe tip edge. In this presentation, we report the observation of light emissions that occur before arcing current initiation (arcing explosion) and the validation of measurement results. Furthermore, we explore the evolution behavior of arcing in the initiation phase with a multiple-snapshot method. This research will contribute to understanding arcing evolution and underlying physics