A square superlattice pattern formed through complex interactions among volume discharges and surface discharge in dielectric barrier discharge

Abstract

We report a square superlattice pattern with two interleaving grids [(line-grid) and (rod-grid)] and three lattices composed of discrete spots [spot, halo, and spot(w)] in dielectric barrier discharge. The spatiotemporal dynamics is measured by intensified charge-coupled device, photomultiplier tubes, and high-speed video camera. It is found that the line-grid is composed of direction-selective surface discharges, which are induced by wall charge of spot, compressed by wall charge of spot(w), and guided by wall charge of random spots in rod. The rod-grid and the following halo consist of random volume discharges, which are affected by the distribution of wall charges of spot(w), spot, and line-grid. The pattern is formed through a series of complex interactions among volume discharges and surface discharge. These results will promote the study on interaction between volume discharge and surface discharge in dielectric barrier discharge.