Study the Effect of Electrodes Types on the Properties of DBD Plasma using Optical Emission Spectroscopy

The design of the Dielectric Barrier Discharge plasma system (DBD) which operates at the atmospheric pressure to generate cold plasma. This system consists of a high voltage power supply of up to (20 kV) and a current discharge of up to (mA) and a frequency of about (35 kHz). Two electrodes, made of copper and aluminum, with a diameter of (5 cm). The electrodes are surrounded by a Teflon dielectric material with thickness (2.5 cm) and (2 mm) thickness of dielectric material made of glass is placed between the electrodes to ensure electrical discharge and plasma generation. These electrodes are connected to the power supply. Plasma parameters (electron temperature, electron density, plasma frequency, Debye length, and Debye number) generated from the dielectric barrier discharge system by Optical Emission Spectroscopy for the nitrogen gas spectrum using the Boltzmann plot method for plasma parameters were calculated. In this work also it was studied the effect of the electrodes made of (copper and aluminum), the effect of the applied voltage (12 kV to 20 kV) on the properties of the generated plasma when the stability of the distance between poles (3 mm), the applied frequency (25.91 kHz), and the dielectric material thickness made of glass. From studying (current-voltage) curve note it was that, the discharge current increases when the voltage applied for both (copper and aluminum) electrodes increase. In addition, the disparity in the values of plasma parameters when the voltage applied increase.