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Radial theory of the ion current onto a probe in a low-pressure plasma with allowance for volume ionization and collisions with neutrals

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Abstract

The ion current onto a spherical or cylindrical probe is analyzed in the cold-ion approximation with allowance for ionization and collisions with neutrals. An expression for the ion density that takes into account both ionization and collision in the finite-size perturbed region is derived. The current-voltage characteristics for the dimensionless parameters r p/λ D = 0.0001−10, λ i /λ D = 0.01 − ∞, and zλ D/(kT e /M)1/2 = 0−5 are determined by numerically solving Poisson’s equation, and the corresponding approximate expressions are obtained.

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Authors and Affiliations

  1. Petrozavodsk State University, pr. Lenina 33, Petrozavodsk, Republic of Karelia, 185910, Russia

    V. I. Sysun & V. S. Ignakhin

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  1. V. I. Sysun
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  2. V. S. Ignakhin
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Original Russian Text © V.I. Sysun, V.S. Ignakhin, 2011, published in Fizika Plazmy, 2011, Vol. 37, No. 4, pp. 377–386.

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Sysun, V.I., Ignakhin, V.S. Radial theory of the ion current onto a probe in a low-pressure plasma with allowance for volume ionization and collisions with neutrals. Plasma Phys. Rep. 37, 347–356 (2011). https://doi.org/10.1134/S1063780X11030160

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  • DOI: https://doi.org/10.1134/S1063780X11030160

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