摘要: Atmospheric-pressure air dielectric barrier discharges (APADBDs) can be considered as one of the important plasma sources due to the developments in applications such as ozone generation, plasma-assisted combustion, active flow control, and pollution control. APADBDs are generated typically in either the coaxial or planar reactors featured as filamentary discharges with many current events observed during each voltage period as generally sustained by an AC power under few kHz frequency. These filaments, named microdischarges (MDs) in the literature, seem to occur randomly in both space and time. A single MD is the basic element producing reactive species (O, N, O3, etc.) and transferring charges across the gap between electrodes. Therefore, it is critical to understand the fundamental properties of a single MD for characterizing the APADBDs. An experimental platform was designed to investigate the statistical behavior of MDs generated in a planar APADBD reactor using a kHz sinusoidal power source. The features of a single MD are measured and compiled statistically. Moreover, numerical simulations provide another alternative to characterize a single MD generated in APADBDs. A semi-empirical 1.5D plasma fluid model is proposed to reveal the underneath chemical mechanisms taking place within the discharge column of a single MD.