Comments on "Determination of space-dependent electron distribution function by combined use of energy and Boltzmann transport equations: improvement, evaluation, and explanation

For original paper, see S.L. Wang et al., ibid., vol.39., no.8, pp. 1821-1828 (Aug. 1992). In the work of Wang et al., an efficient method for obtaining the space-dependent energy electron distribution (EED) was reviewed and some limitations related to its applicability were extensively discussed by comparisons with one dimensional Monte Carlo simulations. Here, the reasons for some of these limits are clarified, and a fundamental limitation which was not considered is presented.<>