Effects of ion motion on linear Landau damping

Xu, Hui and Sheng, Zheng-Ming and Kong, Xiang-Mu and Su, Fu-Fang (2017) Effects of ion motion on linear Landau damping. Physics of Plasmas, 24 (2). 022101. ISSN 1070-664X (https://doi.org/10.1063/1.4975020)

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Abstract

The effects of ion motion on Landau damping has been studied by the use of one-dimensional Vlasov-Poisson simulation. It is shown that the ion motion may significantly change the development of the linear Landau damping. When the ion mass is multiple of proton mass, its motion will halt the linear Landau damping at some time due to the excitation of ion acoustic waves. The latter will dominate the system evolution at the later stage and hold a considerable fraction of the total energy in the system. With very small ion mass, such as in electron-positron plasma, the ion motion can suppress the linear Landau damping very quickly. When the initial field amplitude is relatively high such as with the density perturbation amplitude δn/n0 > 0.1, the effect of ion motion on Landau damping is found to be weak or even ignorable.

  • Item type:Article
    ID code:59829
    Dates:
    Date
    Event
    2 February 2017
    Published
    12 January 2016
    Accepted
    Notes:This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Xu, H., Sheng, Z-M., Kong, X-M., & Su, F-F. (2017). Effects of ion motion on linear Landau damping. Physics of Plasmas, 24(2), [022101] and may be found at https://dx.doi.org/10.1063/1.4975020.
    Subjects:Science > Physics > Plasma physics. Ionized gases
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:16 Feb 2017 10:15
    Last modified:11 Apr 2024 01:16
    URI:https://strathprints.strath.ac.uk/id/eprint/59829
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