Spectral Research On Dynamics Process Of Argon Dielectric Barrier Discharge At Atmospheric Pressure

Due to the fact that the low temperature plasma was widely used in industry and medical science, more attention has been put into the study of the plasma. In recent years, attention has been attracted by needle- plate dielectric barrier discharge which was an important way to produce low-temperature plasma, with the advantages of simple gradually and low cost. Currently, the study of needle-plate dielectric barrier discharge mainly focused on the measurement of the electrical properties of discharge, plasma parameters and the discharge process of the particles. In this paper, using the electrical method, we measured the discharge power and pulse current of argon needle-plate dielectric barrier discharge in atmospheric pressure, the dynamics process of particles and the plasma jet "plasma bullets" speed. The result shows that the greater the applied voltage, the greater the power and discharge current pulses will be more, and "plasma bullets" speed range 10~3 m/s and 10~4m/s magnitude. Ar I 696 nm Stark broadening was measured for obtaining spatially resolved measurements of electron density by emission spectrometry, measured the electron excitation temperature and the vibrational temperature of N2 molecules under different voltages by spectral line intensity ratio method. The result shows that the electric field strength has a greater impact on the electron density and the applied voltage has a certain influence on the vibrational temperature of nitrogen molecules and electron excitation temperature.