Slowly moving test charge in a two-electron component non-Maxwellian plasma

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Ali, Shahid and Eliasson, Bengt (2015) Slowly moving test charge in a two-electron component non-Maxwellian plasma. Physics of Plasmas, 22 (8). 084508. ISSN 1070-664X (https://doi.org/10.1063/1.4928901)

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Abstract

Potential distributions around a slowly moving test charge are calculated by taking into account the dynamics of electron-acoustic waves (EAWs) in an unmagnetized plasma. The hot electrons are assumed to be suprathermal and obey the Kappa distribution function, whereas the cold inertial electrons are described by the Vlasov equation with a Maxwellian equilibrium distribution, and the positive ions form a static neutralizing background. The test charge moves slowly in comparison between both the hot and cold electron thermal speeds and is therefore shielded by the electrons. This gives rise to a short-range Debye-H�ückel potential decaying exponentially with distance and to a far field potential decaying as inverse third power of the distance from the test charge. The results are relevant for both laboratory and space plasma, where suprathermal hot electrons with power-law distributions have been observed.

ORCID iDs

Ali, Shahid and Eliasson, Bengt ORCID logoORCID: https://orcid.org/0000-0001-6039-1574;
  • Item type:Article
    ID code:54120
    Dates:
    Date
    Event
    21 August 2015
    Published
    5 August 2015
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:31 Aug 2015 11:10
    Last modified:22 Nov 2024 01:09
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/54120
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