Study on bright-dim hollow hexagonal superlattice pattern in dielectric barrier discharge

Abstract

We report on the investigation of the bright-dim hollow hexagonal superlattice pattern (BDHHSP) in dielectric barrier discharge (DBD) for the first time. It bifurcates from a hexagon pattern as the applied voltage increases. The spatiotemporal structure investigated by using an intensified charge device and a lens-aperture photomultiplier tube system shows that the BDHHSP is an interleaving of three different sub-lattices, which are bright spots, dim spots, and halos, respectively, and dim spots are located at the center of the triangle formed by three bright spots. But not all the centers of each triangle have a dim spot. The formation mechanism of the phenomenon called selectively insert discharge is discussed. The results have significance for the selective mechanism of discharge position in the DBD system.