Transport coefficients for He^{+} ions in mixtures He/CF_{4}: modeling laboratory and astrophysical plasmas
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/CF_{4} 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 (Eelectric field, Ngas density) and accounting for nonconservative collisions. This paper is dedicated to the presentation of the set for He^{+}ions scattering crosssections in CF_{4} which is estimated using available experimental data for exothermic charge transfer crosssections producing CF_{3}^{+} and CF_{2}^{+}ions and endothermic charge transfer crosssection producing CF^{+}, C^{+} and F^{+}ions. The aim of this paper is to determine how the addition of a percentage for He in He/CF_{4} mixtures affects the separation of bulk and flux transport parameters for He^{+}ions.
 Publication:

Contributions of the Astronomical Observatory Skalnate Pleso
 Pub Date:
 December 2022
 DOI:
 10.31577/caosp.2022.52.3.78
 Bibcode:
 2022CoSka..52c..78N
 Keywords:

 He<SUP>+</SUP>;
 He/CF<SUB>4</SUB> mixtures;
 Monte Carlo simulations;
 cross sections;
 transport coefficients