CAOSP abstracts, Volume: 52, No.: 3, year: 2022

Author(s): Nikitović, Ž.D.; Raspopović, Z.M.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 52, no. 3, p. 78-89.
Date: 12/2022
Title: Transport coefficients for He⁺ ions in mixtures He/CF₄: modeling laboratory and astrophysical plasmas
Keyword(s): He⁺, He/CF₄ mixtures, Monte Carlo simulations, cross sections, transport coefficients
Pages: 78 -- 89
DOI: https://doi.org/10.31577/caosp.2022.52.3.78
NASA ADS Abstract Service: 2022CoSka..52c..78N
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: A complete set of cross sections for helium ions in a mixture of helium and carbon tetrafluoride is recommended. The transport properties for He⁺ions in He/CF₄ mixtures required to model the discharge containing the mentioned ions were calculated by the Monte Carlo method at a temperature of T = 300 K. In this paper we give the drift velocity, characteristic energy, reduced mobility and specially rate coefficients for low and moderately reduced electric fields E /N (E-electric field, N-gas density) and accounting for non-conservative collisions. This paper is dedicated to the presentation of the set for He⁺ions scattering cross-sections in CF₄ which is estimated using available experimental data for exothermic charge transfer cross-sections producing CF₃⁺ and CF₂⁺ions and endothermic charge transfer cross-section producing CF⁺, C⁺ and F⁺ions. The aim of this paper is to determine how the addition of a percentage for He in He/CF₄ mixtures affects the separation of bulk and flux transport parameters for He⁺ions.