Nanosecond Pulse Drive Excimer Light Source Experimental And Model Study

UV excimer lamp, which is generated by dielectric barrier discharge, has a certain intensity of narrow-band ultraviolet radiation, with a very good application prospect. However, the efficiency of UV excimer lamp is a bit low. The purpose of this paper is to raise excimer UV light source efficiency by improving the parameters of power-driven supply.In the experimental study, use the pulse power supply with several variable parameters, which is designed by our group to drive KrCl* excimer lamp. The UV radiation power and UV radiation efficiency of the excimer lamp is measured in the experiment. And also make comparisons with the traditional sinusoidal power-driven. As experiment obtained, UV excimer lamp under nanosecond pulse power drive is 86.5% more efficient than the sine wave voltage drive; the polarity of pulse power characteristics have no significant impact; to increase the supply voltage amplitude, the excimer UV radiation intensity increased, but the efficiency of UV radiation decreased; to increase the pulse power frequency, ultraviolet radiation intensity increases, the efficiency is essentially.In the circuit model, make some simplified calculation according to the equivalent circuit, and give some theoretical explanations. Second discharge is the result of the energy use of the memory charge. Whether or not to make good use of the energy of memory charge is the key factor to improve dielectric barrier discharge efficiency.In the mathematical model, by building a complete set of equations and a reasonable approximation, the simulation results of xenon dielectric barrier discharge are obtained in the one-dimensional conditions. It shows good agreement with the experimental results. Power frequency does not affect the radiation efficiency; the voltage amplitude increases will lead to reduced radiation efficiency; pulse rising edge, falling edge to speed up, the radiation efficiency increases, in which the speed of the falling edge affects the radiation efficiency more significantly; the flat top time of the pulse is almost not affect the radiation efficiency.