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  1. Article ; Online: Electron energy distribution in a dusty plasma: analytical approach.

    Denysenko, I B / Kersten, H / Azarenkov, N A

    Physical review. E, Statistical, nonlinear, and soft matter physics

    2015  Volume 92, Issue 3, Page(s) 33102

    Abstract: Analytical expressions describing the electron energy distribution function (EEDF) in a dusty plasma are obtained from the homogeneous Boltzmann equation for electrons. The expressions are derived neglecting electron-electron collisions, as well as ... ...

    Abstract Analytical expressions describing the electron energy distribution function (EEDF) in a dusty plasma are obtained from the homogeneous Boltzmann equation for electrons. The expressions are derived neglecting electron-electron collisions, as well as transformation of high-energy electrons into low-energy electrons at inelastic electron-atom collisions. At large electron energies, the quasiclassical approach for calculation of the EEDF is applied. For the moderate energies, we account for inelastic electron-atom collisions in the dust-free case and both inelastic electron-atom and electron-dust collisions in the dusty plasma case. Using these analytical expressions and the balance equation for dust charging, the electron energy distribution function, the effective electron temperature, the dust charge, and the dust surface potential are obtained for different dust radii and densities, as well as for different electron densities and radio-frequency (rf) field amplitudes and frequencies. The dusty plasma parameters are compared with those calculated numerically by a finite-difference method taking into account electron-electron collisions and the transformation of high-energy electrons at inelastic electron-neutral collisions. It is shown that the analytical expressions can be used for calculation of the EEDF and dusty plasma parameters at typical experimental conditions, in particular, in the positive column of a direct-current glow discharge and in the case of an rf plasma maintained by an electric field with frequency f=13.56MHz.
    Language English
    Publishing date 2015-09
    Publishing country United States
    Document type Journal Article
    ISSN 1550-2376
    ISSN (online) 1550-2376
    DOI 10.1103/PhysRevE.92.033102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Transmission of electromagnetic waves through a two-layer plasma structure with spatially nonuniform electron density.

    Denysenko, I B / Ivko, S / Smolyakov, A / Azarenkov, N A

    Physical review. E, Statistical, nonlinear, and soft matter physics

    2012  Volume 86, Issue 5 Pt 2, Page(s) 56402

    Abstract: Transmission of a p-polarized electromagnetic wave through a two-layer plasma structure with spatially nonuniform distributions of electron density in the layers is studied. The case, when the electromagnetic wave is obliquely incident on the structure ... ...

    Abstract Transmission of a p-polarized electromagnetic wave through a two-layer plasma structure with spatially nonuniform distributions of electron density in the layers is studied. The case, when the electromagnetic wave is obliquely incident on the structure and is evanescent in both plasma layers, is considered. The conditions for total transparency of the two-layer structure are found for the thin slab case and when the plasma inhomogeneity is weak. It is shown that the transmission coefficient of the p-polarized wave can be about unity, even if the plasma inhomogeneity is large. The effects of plasma inhomogeneity on transparency of the structure are more important if the slabs are thick, comparing with the case of thin layers.
    MeSH term(s) Computer Simulation ; Electromagnetic Fields ; Models, Chemical ; Models, Molecular ; Nonlinear Dynamics ; Plasma Gases/chemistry
    Chemical Substances Plasma Gases
    Language English
    Publishing date 2012-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1550-2376
    ISSN (online) 1550-2376
    DOI 10.1103/PhysRevE.86.056402
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Discharging of dust particles in the afterglow of plasma with large dust density.

    Denysenko, I B / Stefanović, I / Sikimić, B / Winter, J / Azarenkov, N A

    Physical review. E, Statistical, nonlinear, and soft matter physics

    2013  Volume 88, Issue 2, Page(s) 23104

    Abstract: The discharging of dust particles in the afterglow of plasma with large dust density is studied. We used measured electron and metastable dependencies to calculate the rate describing collection of electrons by dust particles by solving the electron ... ...

    Abstract The discharging of dust particles in the afterglow of plasma with large dust density is studied. We used measured electron and metastable dependencies to calculate the rate describing collection of electrons by dust particles by solving the electron balance equation. This rate is compared with the rate calculated using the orbital motion limited (OML) theory. It is found that the OML theory may not be applied for description of dust charging at large afterglow times, and the energetic electrons generated in metastable-metastable collisions significantly affect charging of dust particles. The time dependence for dust charge is calculated by two different approaches: first, the "standard" approach is used, which assumes that ion and electron fluxes to the dust particles are different in the afterglow. Second, the dust charge is calculated by assuming that desorption of electrons from dust particles is very fast. Both approaches gave similar results for dust charging. In addition, the effects of secondary emission due to ion-dust and metastable-dust collisions on dust discharging are investigated. The main source of dust charging in the late afterglow of plasma with large dust density are the energetic electrons generated in Ar(m) metastable-metastable collisions.
    Language English
    Publishing date 2013-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1550-2376
    ISSN (online) 1550-2376
    DOI 10.1103/PhysRevE.88.023104
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Low-pressure diffusion equilibrium of electronegative complex plasmas.

    Ostrikov, K / Denysenko, I B / Vladimirov, S V / Xu, S / Sugai, H / Yu, M Y

    Physical review. E, Statistical, nonlinear, and soft matter physics

    2003  Volume 67, Issue 5 Pt 2, Page(s) 56408

    Abstract: A self-consistent fluid theory of complex electronegative colloidal plasmas in parallel-plate low-pressure discharge is presented. The self-organized low-pressure diffusion equilibrium is maintained through sources and sinks of electrons, positive and ... ...

    Abstract A self-consistent fluid theory of complex electronegative colloidal plasmas in parallel-plate low-pressure discharge is presented. The self-organized low-pressure diffusion equilibrium is maintained through sources and sinks of electrons, positive and negative ions, in plasmas containing dust grains. It is shown that the colloidal dust grain subsystem strongly affects the stationary state of the discharge by dynamically modifying the electron temperature and particle creation and loss processes. The model accounts for ionization, ambipolar diffusion, electron and ion collection by the dusts, electron attachment, positive-ion-negative-ion recombination, and relevant elastic and inelastic collisions. The spatial profiles of electron and positive-ion-negative-ion number densities, electron temperature, and dust charge in electronegative SiH4 discharges are obtained for different grain size, input power, neutral gas pressure, and rates of negative-ion creation and loss.
    Language English
    Publishing date 2003-05
    Publishing country United States
    Document type Journal Article
    ISSN 1539-3755
    ISSN 1539-3755
    DOI 10.1103/PhysRevE.67.056408
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Parameters and equilibrium profiles for large-area surface-wave sustained plasmas.

    Denysenko, I B / Gapon, A V / Azarenkov, N A / Ostrikov, K N / Yu, M Y

    Physical review. E, Statistical, nonlinear, and soft matter physics

    2002  Volume 65, Issue 4 Pt 2B, Page(s) 46419

    Abstract: The equilibrium profiles of the plasma parameters of large-area rf discharges in a finite-length metal-shielded dielectric cylinder are computed using a two-dimensional fluid code. The rf power is coupled to the plasma through edge-localized surface ... ...

    Abstract The equilibrium profiles of the plasma parameters of large-area rf discharges in a finite-length metal-shielded dielectric cylinder are computed using a two-dimensional fluid code. The rf power is coupled to the plasma through edge-localized surface waves traveling in the azimuthal direction along the plasma edge. It is shown that self-consistent accounting for axial plasma diffusion and radial nonuniformity of the electron temperature can explain the frequently reported deviations of experimentally measured radial density profiles from that of the conventional linear diffusion models. The simulation results are in a good agreement with existing experimental data obtained from surface-wave sustained large-diameter plasmas.
    Language English
    Publishing date 2002-04
    Publishing country United States
    Document type Journal Article
    ISSN 1539-3755
    ISSN 1539-3755
    DOI 10.1103/PhysRevE.65.046419
    Database MEDical Literature Analysis and Retrieval System OnLINE

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