Simultaneous formation of striations and patterns in surface dielectric barrier discharge

Abstract

Longitudinal striations and transverse patterns are simultaneously observed in a surface dielectric barrier discharge (DBD) system in argon. Patterned filaments form at sufficient high frequency and moderate voltage. The images of bright filaments and faint regions between them reverse alternately in the two half-cycles. The number of luminous filaments is generally determined by the gas pressure rather than the applied voltage. The striations appear during the plasma expanding above the anode surface in negative half-cycle, in the filaments as well as the regions between them synchronously. The striation spacing does not depend on the voltage, but decreases with the gas pressure in the present configuration. The formations of striation and pattern are two separated processes, and both relate strongly to the accumulated charges on the dielectric surface and the induced surface field.

Pattern formation and dynamics of plasma filaments in dielectric barrier discharges

“…Similar DBD patterns have been reported in a number of papers (see, e.g., the reviews of Purwins et al [1] and Kogelschatz [23], and the papers by Radu et al [24,25], Dong and co-workers [14,[26][27][28][29][30], Ouyang and co-workers [31,32]). Note that in the DBD set-up of Dong et al the voltage is applied through a layer of water (ohmic-capacitive layer).…”

Nonlinear phenomena in dielectric barrier discharges: pattern, striation and chaos

“…In appropriate conditions, the longitudinal striations and the patterns are also simultaneously observed in one DBD system, at least in a surface DBD [108,109]. The patterns are inverse in the negative and positive half-cycles of the surface DBD due to the effect of surface charges, as shown in figure 33.…”