Distribution of surface electric charge in a surface DBD

Summary form only given. For more than one decade, the surface dielectric barrier discharge (SDBD) has been extensively studied in aerodynamic applications as electro-hydrodynamic (EHD) actuators [1]. The SDBD was also largely studied for air pollution treatment due to the lower discharge ignition voltage and the larger contact surface with catalyst than the volume DBD [2]. The propagation and expansion mechanism of discharge on the dielectric surface is the key point for the understanding of the plasma-gas flow interaction. The electric charges deposited on the dielectric surface play an important role in the discharge mechanism, and it has an important influence on the SDBD physics. A lot of works were performed on this topic, for example: the collective effect [3]; self-synchronized breakdown effect due to photodesorption [4]; the surface potential in a SDBD [5], etc.