Influence of vibration on spatiotemporal structure of the pattern in dielectric barrier discharge

The influence of vibration on the spatiotemporal structure of the pattern in dielectric barrier discharge is studied for the first time. The spatiotemporal structure of the pattern investigated by an intensified charge-coupled device shows that it is an interleaving of three sublattices, whose discharge sequence is small rods-halos-large spots in each half-cycle of the applied voltage. The result of the photomultiplier indicates that the small rods are composed of moving filaments. The moving mode of the moving filaments is determined to be antisymmetric stretching vibration by analyzing a series of consecutive images taken by a high-speed video camera. The antisymmetric stretching vibration affects the distribution of wall charges and leads to the halos. Furthermore, large spots are discharged only at the centers of the squares consisting of vibrating filaments. The vibration mechanism of the vibrating filaments is dependent on the electric field of wall charges.