Characterisation of a dielectric barrier surface twin discharge using defined gas mixtures

In the last decades extensive study has been performed on dielectric barrier discharges (DBDs) in several fields of applications of non-thermal atmospheric pressure plasmas. Their applicability ranges from health-promoting effects to the human skin to air decontamination combined with a rather good scalability [1,2]. Further insight into their physical and chemical properties is mandatory for a proper configuration of plasma sources for a given application. In our case a dielectric barrier surface twin discharge is ignited in different gas mixtures. The surface discharge electrode is made of an Al2O3 plate working as a dielectric barrier and grid-structured copper traces on each side of the plate. The electrode is connected to a HV-HF plasma generator with external transformer. The plasma parameters are determined via OES using an absolutely calibrated Echelle-spectrometer [3]. \textbf{References} [1] U. Kogelschatz, B. Eliasson, W. Egli, \textit{J. Phys. IV France}, \textbf{7}, C4-47-C4-66 (1997) [2] A. M. Vandenbroucke, R. Morent, N. De Geyter \textit{et al.}, \textit{Journal of Hazardous Materials}, \textbf{195}, 30-54 (2011). [3] N. Bibinov, H. Halfmann, P. Awakowicz \textit{et al.},\textit{ Measurement Science Technology}, \textbf{18}, 1327-1337 (2007).