TITLE

Shielding of absorbing objects in collisionless flowing plasma

AUTHOR(S)
Tyshetskiy, Yu.; Vladimirov, S. V.
PUB. DATE
October 2010
SOURCE
Physics of Plasmas;Oct2010, Vol. 17 Issue 10, p103701
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electrostatic shielding of a charged absorbing object (dust grain) in a flowing collisionless plasma is investigated by using the linearized kinetic equation for plasma ions with a point-sink term accounting for ion absorption on the object. The effect of absorption on the attractive part of the grain potential distribution in plasma is investigated. For subthermal ion flows, the attractive part of the grain potential in the direction perpendicular to the ion flow can be significantly reduced or completely destroyed, depending on the absorption rate. For superthermal ion flows, however, the effect of absorption on the grain attraction in the direction perpendicular to the ion flow is shown to be exponentially weak. It is thus argued that, in the limit of superthermal ion flows, the effect of ion absorption by the grain on the grain's shielding potential can be safely ignored for typical grain sizes relevant to complex plasmas.
ACCESSION #
54858504

 

Related Articles

  • Scattering of radiation in collisionless dusty plasmas. Tolias, P.; Ratynskaia, S. // Physics of Plasmas;Apr2013, Vol. 20 Issue 4, p043706 

    Scattering of electromagnetic waves in collisionless dusty plasmas is studied in the framework of a multi-component kinetic model. The investigation focuses on the spectral distribution of the scattered radiation. Pronounced dust signatures are identified in the coherent spectrum due to...

  • Plasma Response to a Single Grain/Electrostatic Interaction Between Grains. Lampe, Martin // AIP Conference Proceedings;2002, Vol. 649 Issue 1, p59 

    We review the physics of shielding around a single dust grain in a plasma, charging of the grain, and electrostatic interaction between two nearby grains. Orbital-motion-limited (OML) theory is found to be an acceptably accurate representation for the contribution of positive-energy ions to...

  • Effects of dust particles on the dynamics of blobs in the scrape off layer. Jovanović, D.; de Angelis, U.; Fedele, R.; Pegoraro, F. // Physics of Plasmas;Aug2007, Vol. 14 Issue 8, p083704 

    A numerical study is presented of the evolution of plasma blobs in the scrape-off layer of a tokamak, in the presence of dust. Appropriate fluid model equations for the nonlinear interchange mode in a dusty plasma are derived, accounting for the attachment of electrons and ions, as well as for...

  • New Kinetic Variables and the Effective Temperatures in Dusty Plasmas. Schram, Pieter P. J. M.; Trigger, Sergey A.; Zagorodny, Anatoly G. // AIP Conference Proceedings;2002, Vol. 649 Issue 1, p224 

    The kinetic theory of dusty plasmas is derived from first principles with regard to absorption of electrons and ions by dust particles. The charging process is shown to imply a considerable modification of properties in comparison with usual plasmas. Not only the electric charge, but also the...

  • Electrostatic twisted modes in multi-component dusty plasmas. Ayub, M. K.; Ali, S.; Ikram, M. // Physics of Plasmas;2016, Vol. 23 Issue 1, p1 

    Various electrostatic twisted modes are re-investigated with finite orbital angular momentum in an unmagnetized collisionless multi-component dusty plasma, consisting of positive/negative charged dust particles, ions, and electrons. For this purpose, hydrodynamical equations are employed to...

  • Kinetic effects on the Kelvin–Helmholtz instability in ion-to-magnetohydrodynamic scale transverse velocity shear layers: Particle simulations. Nakamura, T. K. M.; Hasegawa, H.; Shinohara, I. // Physics of Plasmas;Apr2010, Vol. 17 Issue 4, p042119 

    Ion-to-magnetohydrodynamic scale physics of the transverse velocity shear layer and associated Kelvin–Helmholtz instability (KHI) in a homogeneous, collisionless plasma are investigated by means of full particle simulations. The shear layer is broadened to reach a kinetic equilibrium when...

  • Nonlinear ion acoustic waves in a quantum degenerate warm plasma with dust grains. Dubinov, A.; Kolotkov, D.; Sazonkin, M. // Plasma Physics Reports;Jan2011, Vol. 37 Issue 1, p64 

    study is made of the propagation of ion acoustic waves in a collisionless unmagnetized dusty plasma containing degenerate ion and electron gases at nonzero temperatures. In linear theory, a dispersion relation for isothermal ion acoustic waves is derived and an exact expression for the linear...

  • Collisionless damping of dust-acoustic waves in a charge varying dusty plasma with nonextensive ions. Amour, Rabia; Tribeche, Mouloud // Physics of Plasmas;2014, Vol. 21 Issue 12, p1 

    The charge variation induced nonlinear dust-acoustic wave damping in a charge varying dusty plasma with nonextensive ions is considered. It is shown that the collisionless damping due to dust charge fluctuation causes the nonlinear dust acoustic wave propagation to be described by a damped...

  • Effects of vortex-like and non-thermal ion distribution on non-linear dust-acoustic waves. Mamun, A.A.; Cairns, R.A.; Shukla, P.K. // Physics of Plasmas;Jul96, Vol. 3 Issue 7, p2610 

    Reports on the incorporation of the effects of vortex-like and non-thermal ion distributions in the study of nonlinear dust-acoustic waves in an unmagnetized dusty plasma. Equations governing the dynamics of small but finite amplitude dust-acoustic waves; Effects of a generic non-thermal ion...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics