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The optimum shielding around a test charge in plasmas containing two negative ions
Department of Physics, Faculty of Science, Port Said University, Port Said, Egypt .
Theoretical Physics Group, Department of Physics, Faculty of Science, Mansoura University, Damietta Branch, New Damietta 34517, Egypt.
Umeå University, Faculty of Science and Technology, Department of Physics. UB International Chair, International Center for Advanced Studies in Physical Sciences, Faculty of Physics & Astronomy, Ruhr University Bochum, D-44780 Bochum, Germany.
2011 (English)In: Journal of Plasma Physics, ISSN 0022-3778, E-ISSN 1469-7807, Vol. 77, no 5, 663-673 p.Article in journal (Refereed) Published
Abstract [en]

This paper focuses on the progress in understanding the shielding around a test charge in the presence of ion-acoustic waves in multispecies plasmas, whose constituents are positive ions, two negative ions, and Boltzmann distributed electrons. By solving the linearized Vlasov equation with Poisson equation, the Debye-Huckel screening potential and wakefield (oscillatory) potential distribution around a test charge particle are derived. It is analytically found that both the Debye-Huckel potential and the wakefield potential are significantly modified due to the presence of two negative ions. The present results might be helpful to understand and to form new materials from plasmas containing two negative ions such as Xe(+) - F(-) - SF(6)(-) and Ar(+) - F(-) - SF(6)(-) plasmas, as well as to tackle extension of the test charge problem in multinegative ions' coagulation/agglomeration.

Place, publisher, year, edition, pages
Cambridge University Press, 2011. Vol. 77, no 5, 663-673 p.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:umu:diva-48957DOI: 10.1017/S0022377811000055ISI: 000295599400008OAI: oai:DiVA.org:umu-48957DiVA: diva2:453100
Available from: 2011-11-01 Created: 2011-10-28 Last updated: 2017-12-08Bibliographically approved

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