Periodic-driven vibration of discharge filaments induced by surface charges in a dielectric-barrier discharge

摘要

The periodic-driven vibration of filament pairs in a dielectric-barrier discharge (DBD) pattern is investigated with successive discharges by a high-speed camera. Images correlated with successive half-driven cycles present three representative types of vibrations of the filament pairs, i.e. vibration along a line, vibration with orientational changes and vibration with a 'stop'. Based on the time-reversal discharge order of the paired filaments, which is demonstrated by images correlated with successive discharge current pulse phases, the involved physics of the vibration is explained by analysis and simulation of the electric field influence induced by surface charges of the filament pairs. Finally, this vibration is proved to be in good agreement with the phenomenon observed from time-integrated images. Moreover, from these results, three general conclusions for filamentary structures in streamer DBDs are obtained and a 'preferential discharge' mechanism is proposed, which is further development of the 'memory effect' of surface charges.