Monte Carlo simulation of electron drift and diffusion in counting gases under the influence of electric and magnetic fields

A fast and accurate computer simulation program for electron drift and diffusion in gases under the influence of electric and magnetic fields is described and some calculated results are compared to precise experimental results in carbon tetraflouride and methane mixtures. The calculated Lorentz angles are shown to be typically within 1° of the measured experimental values. The program allows the electric and magnetic fields to be at any angle to each other.