Proceeding from the Boltzmann kinetic equation for electrons, the system of multigroup equations for the zero and first moments of the distribution function of low-energy electrons is derived within the Lorentz approximation. The system includes the balance equations for concentration and flux density of electrons and is intended for numerical simulation of the transport and kinetics of electrons in the energy range from zero to several tens of electron volt where the angular distribution of electrons is weakly anisotropic.Results of the numerical calculations of electron transport in helium in homogeneous and inhomogeneous electric fields according to the developed multigroup model are compared with results obtained by the Monte Carlo method.
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E. I. Bochkov (2024) studied this question.
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