https://doi.org/10.1140/epjp/s13360-024-05159-2
Regular Article
Numerical exploration of electromagnetic electron whistler-cyclotron instability in Vasyliunas–Cairns distributed non-thermal plasmas: A kinetic theory approach
1
Department of Physics and Applied Mathematics (DPAM), PIEAS, 45650, P.O. Nilore, Islamabad, Pakistan
2
Center of Mathematical Sciences (CMS), PIEAS, 45650, P.O. Nilore, Islamabad, Pakistan
3
Department of Nuclear Engineering (DNE), PIEAS, 45650, P.O. Nilore, Islamabad, Pakistan
4
Department of Physics, Government College University (GCU), 54000, Lahore, Pakistan
5
Theoretical Physics Division (TPD), PINSTECH, 45650, P.O. Nilore, Islamabad, Pakistan
Received:
21
July
2023
Accepted:
4
April
2024
Published online:
10
May
2024
A natural compression/expansion in the extended plasma systems generates the temperature anisotropy in the particle distribution. Such a kinetic anisotropy acts as source of free energies to instigate the generation of a variety of instabilities. These microinstabilities in turn are extensively involved in the enhancement of electromagnetic fluctuations and scatter the particles to reach the quasistable states, with relatively lower anisotropies. One of them is the instability associated with right hand circularly polarized electromagnetic electron whistler-cyclotron mode which significantly contributes to checking/defining the perpendicular electron temperature in large scale extended space plasmas. Its transverse dielectric response function in hybrid non-thermal Vasyliunas–Cairns distributed plasmas (which simultaneously incorporates the characteristics of both type of non-thermalities, i.e., 
and 
) is calculated by using the well-known dispersion relation presented by Gary, 1993 [1]. The obtained dielectric response function is solved numerically to procure the real and imaginary frequencies of whistler instability. The impact of important physical parameters, i.e., non-thermality parameters and 
for different temperature anisotropy A and plasma beta 
is studied on the numerically calculated real frequency and growth rate of whistler instability. Both the real and imaginary frequencies are found sensitive to the respective instability thresholds. It is also investigated that the real frequency and growth rate are remarkably supported by the hybrid non-thermality of and . Contemporary analysis is highly pertinent to comprehend the various magnetized space plasma environments where mixed non-thermal distributions are in frequently existent.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
