论文标题
空间等离子体中的电磁离子离子不稳定性：超热种群的影响
Electromagnetic Ion-Ion Instabilities in Space Plasmas: Effects of Suprathermal Populations
论文作者
论文摘要
在空间的碰撞等离子体中，可以通过沿背景磁场的质子梁来驱动三个不同的离子离子不稳定性：左手谐振，非谐振和右手共振的不稳定性。一般而言，这些不稳定性仅考虑具有麦克斯韦速度分布的理想化质子梁，并且忽略了通常由卡帕幂律复制的超颗粒人群的含义。此外，假设它们各向同性和麦克斯韦分布，现有的理论最大程度地减少了电子的动力学效应。为了克服这些局限性，在本文中，我们介绍了对离子不稳定性进行扩展研究的结果，这些结果表明它们的分散性和稳定性（例如增长率，波浪频率和不稳定的波浪数）对上皮种群和Anisotropic电子的影响非常敏感。这些结果为增强的低频波动的起源提供了有价值的解释，这在空间等离子体中经常观察到，并与质子束相关。
In collision-poor plasmas from space, three distinct ion-ion instabilities can be driven by the proton beams streaming along the background magnetic field: left-hand resonant, non-resonant, and right-hand resonant instabilities. These instabilities are in general investigated considering only idealized proton beams with Maxwellian velocity distributions, and ignoring the implications of suprathermal populations, usually reproduced by the Kappa power-laws. Moreover, the existing theories minimize the kinetic effects of electrons, assuming them isotropic and Maxwellian distributed. In an attempt to overcome these limitations, in the present paper we present the results of an extended investigation of ion-ion instabilities, which show that their dispersion and stability properties (e.g. growth rates, wave frequencies, and the unstable wave numbers) are highly sensitive to the influence of suprathermal populations and anisotropic electrons. These results offer valuable explanations for the origin of the enhanced low-frequency fluctuations, frequently observed in space plasmas and associated with proton beams.
