Abstract
A method for calculating the electron swarm parameters in the transverse direction to the electric field by employing a Fourier-transformed Boltzmann equation is presented. In the method, the typical transverse swarm parameter, the transverse diffusion coefficient DT, is derived from the dispersion relation of the eigenvalue of the equation. The method is applied to methane (CH4) and sulphur hexafluoride (SF6). The results are compared with those from the conventional methods and it is shown that the present method is a reliable means to deduce the transverse coefficient DT. The lateral development of the electron swarms for the model of the steady-state Townsend experiment is also discussed.
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