Potential around a dust grain placed in the plasma sheath

D. Tskhakaya, P.K. Shukla, B. Eliasson

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a theory for potential distributions around a charged dust grain in a plasma with flowing ions. For this purpose, we account for absorption of ions by the grain surface and derive a kinetic ion density response for ion flow speed lying between the electron and ion thermal speeds. Poisson's equation is then solved to obtain the potential distribution close and far from the dust grain. It is found that at distances smaller than half the Debye radius, the potential remains spherically symmetric, while at large distances the potential becomes asymmetric.
LanguageEnglish
Pages404-408
Number of pages5
JournalPhysics Letters A
Volume331
Issue number6
Early online date25 Sep 2004
DOIs
Publication statusPublished - 1 Nov 2004

Fingerprint

plasma sheaths
dust
ions
Poisson equation
radii
kinetics
electrons

Keywords

  • dust grain
  • potential
  • plasma sheath
  • kinetic theory

Cite this

Tskhakaya, D. ; Shukla, P.K. ; Eliasson, B. / Potential around a dust grain placed in the plasma sheath. In: Physics Letters A. 2004 ; Vol. 331, No. 6. pp. 404-408.
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Potential around a dust grain placed in the plasma sheath. / Tskhakaya, D.; Shukla, P.K.; Eliasson, B.

In: Physics Letters A, Vol. 331, No. 6, 01.11.2004, p. 404-408.

Research output: Contribution to journalArticle

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AU - Tskhakaya, D.

AU - Shukla, P.K.

AU - Eliasson, B.

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AB - We present a theory for potential distributions around a charged dust grain in a plasma with flowing ions. For this purpose, we account for absorption of ions by the grain surface and derive a kinetic ion density response for ion flow speed lying between the electron and ion thermal speeds. Poisson's equation is then solved to obtain the potential distribution close and far from the dust grain. It is found that at distances smaller than half the Debye radius, the potential remains spherically symmetric, while at large distances the potential becomes asymmetric.

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KW - plasma sheath

KW - kinetic theory

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