Hexagonal superlattice pattern consisting of colliding filament pairs in a dielectric barrier discharge

Abstract

Colliding-pairs hexagonal superlattice pattern (CPHSP) is studied in a dielectric barrier discharge system. The evolution of CPHSP bifurcating from a hexagonal pattern to chaos is shown. The phase diagrams of CPHSP as a function of discharge parameters are given. From a series of pictures taken by a high speed video camera, collisions between two spots are observed and the superposition of many collisions results in each big spot presenting four small spots on long time scales. Measurements of the correlation between filaments indicate that the pattern is an interleaving of four different transient hexagonal sublattices. Depending on the discharging sequence, the forces exerted on one colliding spot are discussed briefly.

Honeycomb superlattice pattern in a dielectric barrier discharge in argon/air

“…15 The filaments can self-organize into various types of regular patterns for different parameters. [16][17][18] They are particularly well suited to studies of the spatiotemporal characteristics because they are self-luminous. Previously, the spatiotemporal characteristics were investigated by instantaneous images with time integration.…”

Formation of spiral patterns in dielectric-barrier discharge investigated by an intensified-charge coupled device

“…Its devices usually consist of two parallel electrodes, at least one of them covered with dielectric materials. In the past decades, the DBD system has become an attractive pattern formation system since a variety of patterns have been observed [12][13][14][15][16][17][18][19]. Numerous complex spatiotemporal structures have been revealed through taking instantaneous pictures by intensified charge coupled devices (ICCDs) and the measurement of correlations between discharge filaments by photomultiplier tubes (PMTs) [14][15][16][17][18][19].…”

Motion of rotating pairs in a hexagonal superlattice pattern within dielectric barrier discharge

“…Boeuf et al analyzed the time evolution of a honeycomb pattern through images taken by an ICCD camera in a half voltage cycle [14]. We studied a colliding-pairs hexagonal superlattice pattern (CPHSP) with dynamic spots nesting in a hexagonal framework constituted by stationary spots both microscopically and macroscopically [15]. In this work, we will present microscopic motion behaviors of dynamic spots in the rotating-pairs hexagonal superlattice pattern (RPHSP), whose macroscopic behaviors have been studied previously [16,17].…”