Electrical And Emitted Spectrum Investigation Of Dielectric Barrier Discharge In Argon At Atmospheric Pressure

Obtaining large area homogeneous discharge at atmospheric pressure is very significant in industrial applications. In this article, the electrical and the electron excitation temperature researches have been carried out in large area dielectric barrier discharge in argon at atmospheric pressure, and the main results presented in the dissertation have been summarized as follows:(1) The number of the current pulse increase gradually in per half of the applied voltage with the increase of the applied voltage, the decrease of the gas gap or the decrease of the driving frequency. The amplitude of the current pulses decreases quasi-monotonically in half a cycle of the applied voltage. The applied voltage needed for the first breakdown decrease gradually in per half cycle of the applied voltage.(2) The breakdown voltage for each current pulse is different in per half of the applied voltage. The breakdown voltage of the next current pulse is always affected by the previous current pulse in per half of the applied voltage.Two discharge modes, pesudoglow and glow discharge modes, can be coexistence in a MCP discharge sequence. The discharge mode tends to convert from filamentary to uniform discharge mode when increasing the applied voltage, decreasing the gas gap and reducing driving frequency, respectively.(3) The accumulated charges on the dielectric plate play a very important role with the formation of the MCP discharge and the discharge mode conversion; it promotes the discharge at the beginning and restrains the discharge at the following stage in the MCP discharge sequence.(4) In Ar DBD at atmospheric pressure, the variation of the electron excited temperature with reasing gas gap is researched. Also the corresponding power of the gas gap and discharge tern with increasing gas gap are studied.