Study of temperature anisotropy and kappa distribution impacts on EMIC waves in multi-species magnetized plasma

Abstract. This research investigates the impact of temperature anisotropy on electromagnetic ion cyclotron (EMIC) waves in a multi-ion magneto-plasma environment composed of H+, He+, and O+ ions, with a particular emphasis on the role of the kappa distribution function. The study delves into how variations in temperature anisotropy influence the behavior and properties of EMIC wave propagation, considering the complex interplay between anisotropic thermal effects and the non-Maxwellian kappa distribution. Through a comprehensive analysis involving theoretical modeling and numerical simulations, the research elucidates how these factors alter wave dispersion relations, growth rates, and spatial structures of EMIC waves. The results reveal significant deviations from classical Maxwellian predictions, highlighting the necessity of incorporating kappa distributions for accurate descriptions of wave behavior in realistic plasma conditions. This enhanced understanding has broader implications for space physics, astrophysical phenomena, and laboratory plasma experiments, where non-equilibrium conditions and multiple ion species are prevalent. The results are analyzed in the context of the space-plasma-parameter-relevant region within Earth's magnetosphere.