Electrical Diagnostics of Surface Dielectric-Barrier Discharge with Coaxial Configuration

A coaxial electrode configuration with surface dielectric barrier discharge was designed to generate a cold plasma jet flowing out into the ambient air. A technique for determining the plasma region extension based on measuring average current and applied voltage has been proposed. The capacitance of the system was calculated from measured current and voltage. Using photographic images of the discharge region, the specific capacitance of the discharge system was determined depending on the electric parameters. The obtained values were compared with the calculated capacitance of the given electrode system geometry.