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XIAO Dengming (肖登明), DENG Yunkun (邓云坤). Determination of Electron Swarm Parameters in Pure CHF3 and CF4 by a Time-Resolved Method[J]. Plasma Science and Technology, 2013, 15(1): 25-29. DOI: 10.1088/1009-0630/15/1/05
Citation: XIAO Dengming (肖登明), DENG Yunkun (邓云坤). Determination of Electron Swarm Parameters in Pure CHF3 and CF4 by a Time-Resolved Method[J]. Plasma Science and Technology, 2013, 15(1): 25-29. DOI: 10.1088/1009-0630/15/1/05

Determination of Electron Swarm Parameters in Pure CHF3 and CF4 by a Time-Resolved Method

Funds: supported by National Natural Science Foundation of China (No. 51177101)
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  • Received Date: March 26, 2012
  • 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 tetrafluoride (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)lim, which is valid for the analysis of insulation characteristics and applications to power equipment. Comparisons of the electron swarms parameters between CHF3 and CF4 have been performed, and the global warming potential (GWP) is also taken into account.
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