Computer simulation study of correspondence between experimental and theoretical electron drift velocities. II. Constant total collision frequency model gases

Electron drift velocities W SC and W FD obtained respectively from Schlumbohm's and Frommhold's experiments are calculated by a Monte Carlo simulation for five cases of model gases. The obtained drift velocities are compared with the theoretical drift velocities defined as the average velocity V d of the steady state Townsend condition and the average velocity W v , the centre of mass drift velocity W r and the mean arrival time drift velocity W m of an isolated electron swarm, which are calculated by a separate Monte Carlo simulation in a free space for the respective model gases. It is found that W SC is almost equal to W m , and that W FD is almost equal to drift velocity W w represented as 1 / 2 (W r +W m ), for the E/N values studied here. It is also found that the difference between electron drift velocities depends not only on the E/N value but also on the value of the effective ionization frequency.