A self-consistent model of plasma polarization around an isolated micron-sized dust particle under the action external electric field is presented. It shown that quasineutral condition fulfilled and formed volume charge totally screens particle. The ion focusing wake formation behind are demonstrated for different mean free paths fields. obtained at low values trapped ions play main role in screening charge. For high fields, density decreases screened mainly by ions.

A self-consistent nonlocal model of the positive column a dc glow discharge with dust particles is presented. Radial distributions plasma parameters and component in an axially homogeneous are considered. The based on solution Boltzmann equation for electron energy distribution function, drift-diffusion equations ions, Poisson electric field. radial particle density cloud was fixed as given steplike function or chosen according to equilibrium distribution. balance ion production argon...

A self-consistent kinetic model of a low-pressure dc glow discharge with dust particles based on Boltzmann equation for the electron energy distribution function is presented. The ions and electrons production in ionizing processes as well their recombination dust-particle surface tube wall were taken into account. influence concentration ${N}_{d}$ gas parameters was investigated. It shown that increase leads to an averaged electric field ion density, decrease charge density dusty cloud....

Experimental investigations of dusty plasma parameters a dc glow discharge were performed in vertically oriented tube. Under certain conditions, dust-free regions (voids) formed the center dust particle clouds that levitated strong electric field stratified positive column. A model for radial distribution inert gases was developed. The behavior void formation investigated different conditions (type gas, pressure, and current) (particle radii total number). It shown it is ion drag force...

Dust-particles charging in a low-pressure glow discharge was investigated theoretically. The dust-particle charge found on the basis of developed self-consistent model taking into account nonequilibrium character electron distribution function and formation an ionic coat composed bound or trapped ions around dust particle. charge, radial distributions density, free densities, electrostatic potential were found. It shown that non-Maxwellian collisional flux both reduce comparison with...

Spherically symmetrical strata (striation) in a dc glow discharge were discovered. Experiments carried out low-pressure steel chamber that served as cathode. An anode was placed the center of chamber. The stratification observed some molecular gases: air, ${\mathrm{N}}_{2},$ ${\mathrm{O}}_{2},$ ${\mathrm{CO}}_{2},$ and acetone vapor. A simple relation between radii their number ${r}_{n}{/r}_{n\ensuremath{-}1}=\ensuremath{\alpha},$ where $\ensuremath{\alpha}=1.4--2$ (depending on gas...

The influence of a highly pronounced non-equilibrium characteristic the electron energy distribution function in stratified dc glow discharge on process dust particle charging complex plasma is taken into account for first time. calculated charge spatial essentially non-homogeneous and it can explain vortex motion particles at periphery dusty cloud obtained experiments.

A self-consistent model for trapped-ion-cloud formation around a dust particle immersed in low-temperature low-density plasma is presented. The based on the solution of an integral balance equation trapped-ion density, free ion and electron densities, Poisson electric potential distribution. It shown that, weakly collisional regime plasma, trapped ions form spread “shell” with maximum located at some distance from negatively charged core (dust particle) proportional to Debye length....

The work is aimed at describing non-local effects in the positive column of a low-pressure stratified dc glow discharge argon with dust particles vertical cylindrical tube. Numerical calculations plasma parameters axis tube were performed help hybrid model based on solution Boltzmann equation for electron energy distribution function (EEDF). Axial distributions optical emission from striations measured experimentally. Negatively charged gas should levitate anode-side branch an electric field...

Abstract The effect of plasma polarization around a negatively charged dust particle is investigated with the help Monte Carlo simulation ion trajectories in electric field and an external field. induced dipole moment such system was estimated wide range parameters. It shown that very large, has non‐monotonous dependence on For small field, it weakly depends charge particle. reduces decrease mean free path (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

This paper presents a self-consistent model of plasma polarization around an isolated micrometer-sized dust particle being under the action external electric field. It describes ion focusing and wake formation for particles with different radii fields. is shown that despite wake, maintains quasi-neutral condition negatively charged particle, volume charge formed as result screens completely. also in field, dipole moment part nearest to proportional charge. As field increases reaches some...

Abstract Numerical investigations of different properties the system a dust particle and ion cloud are presented. The model is based on solution Newton equations for trajectories with Monte‐Carlo simulations ions initial position, velocity distribution, mean three path. calculations density distribution around single were made taking into account presence an external electric field. charge was calculated self‐consistently electron fluxes towards particle. A two‐dimensional spatial potential...

Abstract Experimental investigations of dusty plasma parameters a DC glow discharge were performed in helium and argon. In the helium, at high current dust‐free regions (voids) formed center dust particles clouds that levitated strong electric field stratified positive column. experiments with argon, moved from tube to periphery current. The behavior voids formation was investigated for different conditions (sort gas, pressure current) (particles radii total number). It shown it is ion drag...

Abstract A non‐stationary non‐local kinetic model for radial distributions of dusty plasma parameters based on the solution Boltzmann equation electron energy distribution function is presented. Electrons and ions production in ionizing collisions their recombination dust particle surface were taken into account. The drift‐diffusion approximation was used. To obtain self‐consistent electric potential Poisson It shown that at high density electrons can exceed ionization region cloud. In this...

In this paper, a self‐consistent numerical model that describes the behavior of plasma around an isolated, highly charged dust particle is presented. Using developed model, distributions space charge density and potential in presence external electric field are obtained. These thoroughly analysed though Legendre decomposition. For different parameters, such as radius particle, amplitude field, mean free path ions, dipole moment ion cloud surrounding calculated. It turns out dependencies on...

A model of the positive column a DC glow discharge in argon with dust particles is presented. The based on solution non-local Boltzmann equation for electron energy distribution function (EEDF), drift-diffusion equations ions, and Poisson self-consistent electric field. radial density cloud calculated according to an equilibrium electrostatic field under action ion drag force. It shown that if center tube force larger than force, dust-free region (void) central part formed. Otherwise (for...

Abstract A self‐consistent kinetic model of a low pressure DC glow discharge with dust particles based on Boltzmann equation for electron energy distribution function is presented. The influence concentration N d gas and parameters were investigated. It shown that the increase leads to averaged electric field ion density, decrease particle charge in dusty cloud. absorption electrons ions surface does not lead depletion due adjustment (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

A new model for the formation of trapped ions around a negatively charged dust particle immersed in low-density non-equilibrium plasma gas discharge is presented. It shown that ionic coat leads to shielding proper charge particle. In experiments it only possible detect effective equal difference between and ions.

The formation of clouds dust nano-particles in a spherical dc glow discharge ethanol was observed. Nano-particles were formed process coagulation dissociation products plasma gas discharge. During the particles captured into electric potential wells strong striations Periodically, cloud experienced some sudden instability (explosion), and started to move cathode at high velocity. It proved that velocity particle an exponentially decaying function time as case dissipative solitary waves.