Abstract
The evolution of two successive filamentary discharges in dielectric barrier discharge (DBD) has been studied by the use of two-dimensional particle-in-cell simulations with Monte Carlo collisions included. It is shown that these filamentary discharges involve the interplay between the external field, the surface charge field, and the space charge field. This leads to a few fine structures emerging, such as the weak discharge occurring at the zero-crossing point of the ac voltage, the splitting phenomenon of filaments, and the coexistence of positive and negative surface charges at footprints of the filamentary discharges. Our simulation results reveal the underlying physics governing the discharge and explain the dynamical behaviors of the DBD filaments observed in experiments.
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