Properties of the coaxial DBD forming plasma jet in the air flow at atmospheric pressure

The non-thermal plasma source based on the high-frequency (100 kHz) sinusoidal dielectric barrier discharge (DBD) generating the plasma jet in air at atmospheric pressure is described. This source uses the electrode system of a coaxial geometry and able to work at the low- and high-power regimes. The features of DBD in these regimes are discussed. A narrow plasma jet was generated in airflow at the velocities in the range of 20-80 m/s. The presented experimental results give insight into the spatial-temporal behaviour of the gas discharge plasma inside the coaxial DBD and the spatial characteristics of plasma jet outside the discharge zone as well.