Slow test charge response in a dusty plasma with Kappa distributed electrons and ions

S Ali, B Eliasson

Research output: Contribution to journalArticle

Abstract

The electrostatic potential around a slowly moving test charge is studied in a dusty plasma where the ions and electrons follow a powerlaw Kappa distribution in velocity space. A test charge moving with a speed much smaller than the dust thermal speed gives rise to a short-scale Debye-Hueckel potential as well as a long-range far-field potential decreasing as inverse cube of the distance to the test charge along the propagation direction. The potentials are significantly modified in the presence of high-energy tails, modeled by lower spectral indices in the ion and electron Kappa distribution functions. Plasma parameters relevant to laboratory dusty plasmas are discussed.
LanguageEnglish
Article number084003
Number of pages6
JournalPhysica Scripta
Volume92
Issue number8
DOIs
Publication statusPublished - 17 Jul 2017

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dusty plasmas
Plasma
Charge
Electron
ions
electrons
Far Field
Electrostatics
Regular hexahedron
High Energy
Tail
Power Law
Distribution Function
Propagation
far fields
dust
distribution functions
electrostatics
Range of data
propagation

Keywords

  • test charge
  • dusty plasma

Cite this

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Slow test charge response in a dusty plasma with Kappa distributed electrons and ions. / Ali, S; Eliasson, B.

In: Physica Scripta, Vol. 92, No. 8, 084003, 17.07.2017.

Research output: Contribution to journalArticle

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AU - Ali, S

AU - Eliasson, B

PY - 2017/7/17

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N2 - The electrostatic potential around a slowly moving test charge is studied in a dusty plasma where the ions and electrons follow a powerlaw Kappa distribution in velocity space. A test charge moving with a speed much smaller than the dust thermal speed gives rise to a short-scale Debye-Hueckel potential as well as a long-range far-field potential decreasing as inverse cube of the distance to the test charge along the propagation direction. The potentials are significantly modified in the presence of high-energy tails, modeled by lower spectral indices in the ion and electron Kappa distribution functions. Plasma parameters relevant to laboratory dusty plasmas are discussed.

AB - The electrostatic potential around a slowly moving test charge is studied in a dusty plasma where the ions and electrons follow a powerlaw Kappa distribution in velocity space. A test charge moving with a speed much smaller than the dust thermal speed gives rise to a short-scale Debye-Hueckel potential as well as a long-range far-field potential decreasing as inverse cube of the distance to the test charge along the propagation direction. The potentials are significantly modified in the presence of high-energy tails, modeled by lower spectral indices in the ion and electron Kappa distribution functions. Plasma parameters relevant to laboratory dusty plasmas are discussed.

KW - test charge

KW - dusty plasma

UR - http://iopscience.iop.org/1402-4896/92/8/084003

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JO - Physica Scripta

T2 - Physica Scripta

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