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Optical and electrical characterization of pulsed dielectric barrier discharges in heterogeneous structures

In the context of expanding plasma-catalytic cleaning techniques where discharges develop inside heterogeneous catalytic supports like packed beds or honeycomb monoliths, the understanding of streamers propagation physics in such nonhomogeneous media is of great interest. For that purpose, have been compared pulsed discharges inside two identical plane-to-plane dielectric barrier devices, one of them being coupled with a honeycomb monolith of cordierite. Electrical records and corresponding images of plasma properties in both these reactors are presented.