An improved Monte Carlo method for simulation electron transport in SF/sub 6/-N/sub 2/ gas mixture

Abstract

An improved Monte Carlo method is developed for the simulation of the electron transport of SF/sub 6/-N/sub 2/ gas mixture in the uniform electric field. The electron swarm behavior of SF/sub 6/-N/sub 2/ gas mixture is calculated and analyzed over the E/N range of 272.83-364.51Td and compared with the experimental results. The result of Monte Carlo simulation shows that present set of cross section of SF/sub 6/ and N/sub 2/ revised according to experimental results gives the values of swarm parameters such as ionization and electron attachment coefficients, drift velocity and longitudinal diffusion coefficient in excellent agree with the respective measurement for the range of a relatively wide range of E/N. The simulation and experiment results also shows clearly that the effective ionization coefficient and drift velocity descends with the increase of SF/sub 6/ content and diffusion effect of N/sub 2/ is stronger than that of SF/sub 6/, while the diffusion effect of SF/sub 6/-N/sub 2/ is between that of SF/sub 6/ and N/sub 2/.