Determination of Electron Swarm Parameters in Pure CHF_3 and CF_4 by a Time-Resolved Method  

作　　者：肖登明 邓云坤 

机构地区：[1]State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University [2]Department of Electrical Engineering, Shanghai Jiaotong University

出　　处：《Plasma Science and Technology》2013年第1期25-29,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (No. 51177101)

摘　　要：The density-normalized effective ionization coefficient （α - η）/N （α and η are the ionization and attachment coefficients respectively）, the electron drift velocity Ve and density- normalized longitudinal diffusion coefficient NDL in trifluoromethane （CHF3） and carbon tetraflu- oride （CF4） were measured using a pulsed Townsend technique over a wide E/N range. From the plots of （α- η）/N, we have derived the limiting field strength, （E/N）nm, which is valid for the analysis of insulation characteristics and applications to power equipment. Comparisons of the electron swarms parameters between CHF3 and CFa have been performed, and the global warming potential （GWP） is also taken into account.The density-normalized effective ionization coefficient （α - η）/N （α and η are the ionization and attachment coefficients respectively）, the electron drift velocity Ve and density- normalized longitudinal diffusion coefficient NDL in trifluoromethane （CHF3） and carbon tetraflu- oride （CF4） were measured using a pulsed Townsend technique over a wide E/N range. From the plots of （α- η）/N, we have derived the limiting field strength, （E/N）nm, which is valid for the analysis of insulation characteristics and applications to power equipment. Comparisons of the electron swarms parameters between CHF3 and CFa have been performed, and the global warming potential （GWP） is also taken into account.

关 键 词：electron swarm parameters CHF3 CF4 pulse Townsend discharge GWP 

分 类 号：O462[理学—电子物理学]