Abstract
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. A narrow plasma jet was generated in airflow at the velocities in the range of 20-80 m/s. The emissive UV-Visual spectra of the discharge zone and plasma jet are presented. The change of the emissive spectrum along the length of plasma jet and on the surface of the quartz substrate to be treated is studied as well. The spectrum reflects the composition of reactive species generated by DBD. The presented experimental results give insight into the properties of the gas discharge plasma inside the coaxial DBD and the spatial characteristics of plasma jet outside the discharge zone as well.
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