Universal characteristics of ion-acoustic wave dynamics in magnetized plasmas with emphasis on Tsallis distribution |
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Authors: | M Akbari-Moghanjoughi |
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Institution: | 1. Faculty of Sciences, Department of Physics, Azarbaijan University of Tarbiat Moallem, 51745-406, Tabriz, Iran
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Abstract: | Using the extended Poincaré-Lighthill-Kuo (PLK) reductive perturbation method, which incorporates the phase-shift variations,
it is shown that common features on propagation and head-on collisions of ion-acoustic waves exist for a magnetized plasmas
of different inertial-less particle distributions. For instance it is remarked that, the soliton amplitude is always independent
of magnetic field strength while strictly depends on its angle regarding the propagation direction. Both types of solitons
(compressive or rarefactive) are shown to exist which are defined through the critical angle γ=π/2 or other critical values depending on plasma fractional parameters. These critical plasma parameter values also define
the sign of head-on collision phase shift. Furthermore, it is proved that for a given set of plasma parameters there is always
a relative angle of propagation regarding to that of the magnetic-field for which the soliton width is maximum. Current findings
apply to a wide range of magnetized plasmas including those containing background dust ingredients or two-temperature inertial-less
particles and may be used to study laboratory or astrophysical magnetoplasmas. |
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Keywords: | |
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