Benchmark calculations for electron velocity distribution function obtained with Monte Carlo Flux simulations

TitleBenchmark calculations for electron velocity distribution function obtained with Monte Carlo Flux simulations
Publication TypeJournal Article
Year of Publication2019
AuthorsL. Vialetto, S. Longo, P. Diomede
JournalPlasma Sources Science and Technology
Volume28
Issue11
Pagination115015
Abstract

Modern, multi-modular plasma modeling requires accurate and versatile methods for the determination of the electron velocity distribution function from which rate coefficients of electron impact processes as well as electron transport quantities are determined. In this paper we propose as a solution a modified version of a strongly overlooked method developed in the early 90's, namely, Monte Carlo Flux (MCF). The improvement lies in a criterion for the otherwise somewhat empirical selection of the time-step used in the method. We show that an MCF based code highlights and overcomes the limitations of two-terms codes such as BOLSIG+ and it is much faster than a conventional Monte Carlo. Moreover, MCF is in excellent agreement with the multi-term method for a wide range of reduced electric fields, being at the same time much simpler to implement and to extend to more general cases than the latter. Explicit illustrations of the Markov matrices representing short-time kinetics are presented to gain insight into the method. The two-dimensional velocity distribution and its expansion into Legendre polynomials are discussed for electrons in argon.

DOI10.1088/1361-6595/ab4b95
Division

FP

Department

CPPC

PID

b387f21889be22a65f934281d66e116b

Alternate TitlePlasma Sources Sci. Technol.

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