Papers by Keyword: Excimer Lamp

Abstract: The dielectric barriers discharges or silent discharges had knew these last years a great progress, particularly in the area of ultraviolet light production, which produced by Xe2* excimer molecules. This new application led to the realization of the nonpolluting excimer lamps. In this work we develop a one-dimensional model of sheath coupled to a kinetic model in NeXe mixture. Calculations were done for sixteen chemicals species in xenon concentration of 10% and under pressure of 400 torr. The results illustrate the spatiotemporal evolution of the charged particles and neutral species as well as the variations of the electric parameters of the lamp during the first pulse discharge.

Abstract: A mathematical model was developed to describe a DC discharge of a Ne-Xe-HCl for excilamp. To achieve our aims we used a one-dimensional model of the cathode sheath coupled to a zero dimensional model of plasma with the external circuit. The spatial profiles of the electron density, ion density and the electric field were shown to exhibit distinct structures of glow discharge. A current in DC discharge increase in monotonous way until reaching 52 A at 225 ns. The breakdown delay times have been calculated, the plasma breakdown is occurring at 160.75ns. The orders of the values of the electric field (105 V/cm) are a condition of the good operation of the excimer lamp. This model permits us to have a good resolution of the sheath region, and to provide a quantitative analysis of the time evolution of the electrical and chemical discharge properties.