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Abstract <p>An approximate method for calculating drift velocity and other kinetic coefficients of heavy ions in a light gas is generalized to gaseous mixtures. Obtained equations are used to calculate the mobilities of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({\text{O}}_{4}^{ - }\)</EquationSource> <!--PlasPhys2660017Ponomarev-m1--> </InlineEquation> and <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({\text{O}}_{2}^{ - }\)</EquationSource> <!--PlasPhys2660017Ponomarev-m2--> </InlineEquation> ions, as well as rate constants for inelastic ion–molecule processes with these ions in helium with small additions of O<sub>2</sub> under an electric field. Calculated results are compared with the results of Monte Carlo simulation. Simple approximate methods allow good agreement to be reached with more complicated Monte Carlo simulation when describing the strong effect of small O<sub>2</sub> concentrations on the ion kinetic properties in He and to shorten computational time by orders of magnitude.</p>

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An Approximate Method for Calculating Kinetic Coefficients of Heavy Ions in He-Containing Mixtures in a Strong Electric Field

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • A. A. Ponomarev,
  • N. L. Aleksandrov

摘要

Abstract

An approximate method for calculating drift velocity and other kinetic coefficients of heavy ions in a light gas is generalized to gaseous mixtures. Obtained equations are used to calculate the mobilities of \({\text{O}}_{4}^{ - }\) and \({\text{O}}_{2}^{ - }\) ions, as well as rate constants for inelastic ion–molecule processes with these ions in helium with small additions of O2 under an electric field. Calculated results are compared with the results of Monte Carlo simulation. Simple approximate methods allow good agreement to be reached with more complicated Monte Carlo simulation when describing the strong effect of small O2 concentrations on the ion kinetic properties in He and to shorten computational time by orders of magnitude.