Abstract
The ion current to a spherical probe is considered with allowance for volume ionization, ion-neutral collisions, and the ion orbital moment. A model based on the molecular dynamics method and applicable for a wide range of plasma parameters is proposed: r p/λD = 0.001–100, λ i /λD = 0.001–100, \({{\nu _i \lambda _D } \mathord{\left/ {\vphantom {{\nu _i \lambda _D } {\sqrt {{{kT_e } \mathord{\left/ {\vphantom {{kT_e } M}} \right. \kern-\nulldelimiterspace} M}} }}} \right. \kern-\nulldelimiterspace} {\sqrt {{{kT_e } \mathord{\left/ {\vphantom {{kT_e } M}} \right. \kern-\nulldelimiterspace} M}} }} = 0.01 - 1\), and T i /T e = 0.01. A convenient representation of the dependences of the relative ion current density on the Langmuir coefficient α2 and a technique for determining the plasma density from simulation results are offered.
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Original Russian Text © V.I. Sysun, V.S. Ignakhin, 2014, published in Fizika Plazmy, 2014, Vol. 40, No. 2, pp. 125–133.
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Sysun, V.I., Ignakhin, V.S. Simulations of the ion current to a probe in plasma with allowance for ionization and ion-neutral collisions: I. Spherical probe. Plasma Phys. Rep. 40, 101–109 (2014). https://doi.org/10.1134/S1063780X14010097
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DOI: https://doi.org/10.1134/S1063780X14010097