Electron swarm parameters in a CO₂:N₂:He:CO gas mixture

Abstract

Various electron transport parameters, namely the centre of mass drift velocity W, the diffusion coefficients DL and DT and the Townsend primary ionisation coefficient alpha T, have been measured in a particular CO2:N2:He:CO gas mixture. Measurements were made for a range of E/N varying from 100 to 500 Td and compared with two-term Boltzmann calculation. The differences between the experimental time of flight and theoretical results are explained in terms of the corrections to the calculated transport coefficients that result from spatial variations in the velocity distribution function.

Transport Parameters and Dielectric Strength of Electrical Discharges in an Arc Discharges in Carbon Dioxide Gas

“…Furthermore, (Davies, 1978) measured the ionization and attachment coefficients in pure CO 2 and ternary CO 2 -N 2 -He gas mixtures over the range 76.3 Td≤E/N≤98.9 Td, and (Egüz, Chachereau, Hösl, & Franck, 2019) experimentally measured the electron swarm parameters in ternary C 4 F 7 N-O 2 -CO 2 , C 5 F 10 O-O 2 -CO 2 and C 5 F 10 O-O 2 -N 2 mixtures over a wide range of E/N. (Wedding, 1985) investigated the electron drift velocity, Townsend ionization coefficient and diffusion coefficients both D L and D T in CO 2 -N 2 -He-CO gas mixtures of the ratio 6:34:54:6 by using time-of-flight (TOF) method, over the range of E/N varying from 100 to 500 Td.…”