|Título||Ion firehose instability in plasmas with plasma particles described by product bi-kappa distributions
Santos, Michel Silva dos
Ziebell, Luiz Fernando
|Abstract||We investigate the dispersion relation for low frequency electromagnetic waves propagating parallel to the ambient magnetic field, considering that the velocity distributions of ions and electrons can be either bi-Maxwellian of product bi-kappa distributions. The effect of the anisotropy and non-thermal features associated to the product-bi-kappa distributions on the firehose instability are numerically investigated. The general conclusion to be drawn from the results obtained is that the increase in non-thermal features which is consequence of the decrease of the j indexes in the ion distribution contributes to increase the instability in magnitude and wave number range, in comparison with bi- Maxwellian distributions with similar temperature anisotropy, and that the increase of non-thermal features in the electron distribution contributes to the quenching of the instability, which is nevertheless driven by the anisotropy in the ion distribution. Significant differences between results obtained either considering product-bi-kappa distributions or bi-kappa distributions are also reported.
|Contido em||Physics of plasmas. Melville. Vol. 21, no. 11 (Nov 2014), 112102, 12 p.
Instabilidade em plasmas
Processos de transporte em plasmas
Propagacao de ondas eletromagneticas em plasmas
Relações de dispersão
Temperatura de plasmas
|Tipo||Artigo de periódico
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