Relativistic Landau resonances

Evangelidis, E. A. and Botha, Gert (2005) Relativistic Landau resonances. Journal of Geophysical Research, 110 (A2). A02216. ISSN 0148-0227

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The possible interactions between plasma waves and relativistic charged particles are considered. An electromagnetic perturbation in the plasma is formulated as an elliptically polarized wave, and the collisionless plasma is described by a distribution in phase space, which is realized in cylindrical coordinates. The linearized Vlasov equation is solved in the semi-relativistic limit, to obtain the distribution function in the rest frame of the observer. The perturbed currents supported by the ionized medium are then calculated, so that an expression can be written for the total amount of energy available for transfer through the Landau mechanism. It is found that only certain modes of the perturbed current are available for this energy transfer. The final expressions are presented in terms of Stokes parameters, and applied to the special cases of a thermal as well as a nonthermal plasma. The thermal plasma is described by a Maxwellian distribution, while two nonthermal distributions are considered: the kappa distribution and a generalized Weibull distribution.

Item Type: Article
Additional Information: E. A. Evangelidis, G. J. J. Botha, (2006), Relativistic Landau resonances, Journal of Geophysical Research, 110, A2, doi: 10.1029/2004JA010756. To view the published open abstract, go to
Subjects: F300 Physics
F500 Astronomy
G100 Mathematics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Dr Gert Botha
Date Deposited: 16 Jan 2013 10:31
Last Modified: 17 Dec 2023 14:04

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