Environmental Engineering Reference
In-Depth Information
This demonstrates the extent to which the Townsend energy coefficient is the ratio
between the average electron and atom energies. Thus, the Townsend energy co-
efficient is a convenient parameter characterizing the mean electron energy with
respect to that of the atom. Figures 4.4 and 4.5 give the dependence of the charac-
teristic electron temperature on the electric field strength for electrons moving in
helium and argon, respectively, in accordance with experimental data [37].
Figure 4.4
The characteristic temperature of electrons drifting in helium under the action of an
electric field according to experimental data reported in [37].
Figure 4.5
The characteristic temperature of electrons drifting in argon under the action of an
electric field according to experimental data reported in [37].
