Environmental Engineering Reference
In-Depth Information
which gives the following expression for the electron drift velocity:
v
eE
3
T
e
2
ν
w
e
D
.
(3.34)
In Figures 3.4 and 3.5 we give the electron drift velocities in helium and argon
calculated on the basis of this formula and using the experimental data for the
electron-atom diffusion cross sections given in Figure 2.7.
The character of establishment of the electron temperature results from interac-
tion between electrons and an electric field, which leads to energy transfer from
Figure 3.4
Electron drift velocity in helium as a function of the electron temperature according
to (3.34) evaluated on the basis of the electron-atom elastic cross sections in Figure 2.8.
Figure 3.5
Electron drift velocity in argon as a function of the electron temperature according
to (3.34) evaluated on the basis of the electron-atom elastic cross sections in Figure 2.8.
