Voids of Brightness in Nanosecond Sliding Microdischarges in Narrow Slot

This paper describes the research work studying a nanosecond microdischarge sliding on a dielectric surface and propagating in a narrow slot in the air of atmospheric pressure. Images of a discharge channel with high spatial resolution were obtained using a digital microscope. It was found out that a plasma luminescence in the discharge could be heterogeneous along the channel length and contain dark voids and continuity breaks.