Distribution of Electrons and Ions Near an Absorbing Spherical Body in a Nonequilibrium Plasma

The applicability of the collision kinetic model of point sinks, viz., the linearized theory of screening of the electric field produced by a charged dust particle, based on the Vlasov equations for electrons and ions in a nonequilibrium plasma, which are supplemented with collision terms in the Bha...

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Vydáno v:Journal of experimental and theoretical physics Ročník 132; číslo 1; s. 148 - 158
Hlavní autor: Filippov, A. V.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Moscow Pleiades Publishing 01.01.2021
Springer
Springer Nature B.V
Témata:
Analysis
Atomic collisions
Classical and Quantum Gravitation
Collision dynamics
Collisions (Nuclear physics)
Domains
Dust
Electric fields
Electrons
Elementary Particles
Ion distribution
Low pressure
Neutral atoms
Nonequilibrium plasmas
Nonlinear
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theory
Relativity Theory
Soft Matter Physics
Solid State Physics
Statistical
Vlasov equations
ISSN:1063-7761, 1090-6509
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Shrnutí:The applicability of the collision kinetic model of point sinks, viz., the linearized theory of screening of the electric field produced by a charged dust particle, based on the Vlasov equations for electrons and ions in a nonequilibrium plasma, which are supplemented with collision terms in the Bhatnagar–Gross–Crook form and effective point sinks to dust particle, is analyzed. The criterion for the applicability of the collision kinetic model of point sinks is the smallness of the deviation of the electron and ion number densities near an absorbing spherical body from unperturbed values. The distributions of electron and ion number densities obtained using the collision kinetic model of point sinks and the orbit motion limited approach are compared. It is shown that the latter approach is applicable only in the low-pressure limit, and upon an increase in pressure, the Coulomb asymptotics of the potential, which is proportional to the frequency electron and ion collisions with neutral atoms (molecules), renders the orbit motion limited approach inapplicable for calculating the ion distribution. It is established that the domain of applicability of the collision kinetic model of point sinks is close to the applicability domain of the Debye–Hückel theory.
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ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776121010118