Study on the expansion of gas discharge channel

Based on the theory of Townsend discharge and the principles of energy conservation, an expansion model of gas breakdown channel is proposed according to the characteristics of discharge channels. Integrated coefficient is introduced to synthetically describe the phenomena of ionization, recombination and diffusion during the movement of particles. Moreover, the varieties and relations of macroscopic and microcosmic parameters in the discharge channels are acquired, and the dynamic evolutions of initial discharge channels are simulated. In addition, the feature and variety roles of discharge channel and pre-developing zone are obtained during the stages of discharge evolution. The influence of different applied voltage on the electron average velocity in the central section cells are contrasted, and the evolution characteristics of discharge channel with different integrated coefficient are also compared.