Slowly moving test charge in a two-electron component non-Maxwellian plasma
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: https://orcid.org/0000-0001-6039-1574;-
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Item type: Article ID code: 54120 Dates: DateEvent21 August 2015Published5 August 2015AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 31 Aug 2015 11:10 Last modified: 23 Oct 2024 00:22 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/54120