Thursday 10
E. Low Pressure Plasmas and Applications
Chair: P. Brault, M. Mikikian - Each talk is 10'+2' duration
› 10:25 - 10:40 (15min)
› Blaise
Electron Swarm Parameters in Binary Gas Mixtures of CF3I with Xe, He, N2 and CO2 from Boltzmann Equation Analysis
Yunkun Deng  1, *@  , Dengming Xiao  1  , Jianguo Jiang  1  , Songlin Qin  1  , Lili Zhu  1  
1 : Department of Electrical Engineering, Shanghai Jiao Tong University  -  Website
No. 1954 Huashan Road, Shanghai 200030, China -  China
* : Corresponding author

The present paper investigated the insulation characteristics of gas mixtures containing CF3I as an alternative to SF6 from the point of view of electron swarm parameters. The density-normalized effective ionization coefficients and electron drift velocities are calculated for the gas mixtures of CF3I with Xe, He, N2 and CO2, by solving the Boltzmann equation in the condition of steadystate Townsend (SST) experiment. The overall range of the density-normalized electric field E/N is from 200 to 800 Td (1 Td = 1017Vcm2). From the variation curve of the effective ionization coefficients with the CF3I mixture ratio, the limiting field strength for which the ionization exactly balances the electron attachment is determined. The calculated results are valid for theoretical analysis of the insulation performance of CF3I and its gas mixtures as replacement of SF6. Additionally, the global warming potential (GWP) is also taken into account to evaluate the possibility of applying in gas insulation of power equipment.


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