Characterization of plasma filament interactions with flowing gas in a plasma jet

In atmospheric pressure plasma jets the gas flow regime within the tube significantly influences the morphology of the plasma discharge. In this work, we quantitatively analyze variations on filament dynamics and overall plasma bullet behavior as a function of flow regime with non-helium gasses and gas mixtures. Turbulent mixing notably impacts the thermophysical processes of the plasma exiting the tube and the composition of gases entering the flow stream. Here we investigate the transition between filament propagation and wall-driven ionization waves as a function of flow rate and gas composition. Schlieren photography and high-speed imaging are employed to analyze discharge behavior.