Experimental Characterization of Ne-Xe DBD Excilamp: Electrical and Optical Analysis

In this paper, we present a detailed study of the experimental measurements of the electrical and optical characteristics in dielectrics barriers discharge (DBD) operating with of a 50% neon-xenon gas mixture for excimer lamp applications. The DBD discharge is excited by a sinusoidal applied voltage for two types of DBD lamps: lamp A (30 × 30 cm) and lamp B (60 × 60 cm), under different values of gas pressures and at a fixed frequency of 20 kHz. The objective of this study is to achieve a uniform light source by optimizing the operating conditions and discharge parameters for maximum luminous efficiency. The temporal evolution of electrical properties of plasma was measured with an oscilloscope, combined with a voltage probe and a current probe. In addition, an optical investigation focusing on luminance and luminous efficacy was carried out to characterize the flat DBD lamp filled with a neon-xenon gas mixture. The results clearly show that DBD lamp B (60 × 60 cm), operated at a gas pressure of 500 mbar, has a better and improved luminous uniformity than DBD lamp A (30 × 30 cm) excited with a sinusoidal voltage waveform.