Kappa分布空间磁化等离子体漂移波动理学理论

空间等离子体是普遍具有密度、温度不均匀性的无碰撞等离子体。在这种等离子体中漂移波是一个重要的物理现象。传统理论基于麦克斯韦速度分布讨论等离子体中的漂移波，取得了巨大成功。然而越来越多的观测表明，Kappa速度分布广泛存在于各种各样的空间等离子体中。作为一种非麦克斯韦分布，Kappa分布可以用于描述密度、温度服从多方状态方程的非均匀等离子体。因此，对于这一类不均匀等离子体，传统漂移波理论不再适用。为了解决这一问题，本项目准备利用Kappa分布研究空间等离子体中的漂移波现象，建立具有密度、温度两种不均匀性的Kappa分布磁化等离子体中静电漂移波的动理学理论，得到其色散关系的理论表达式，分析漂移波的不稳定性。本项目的研究可以使我们更清楚的理解不均匀等离子体中漂移波，因此具有重要物理意义。

Space plasma is a kind of collisionless plasma with inhomogeneous density and temperature. In such plasmas, the drift wave is an important physical phenomenon. Conventional theory studies the physical properties of the drift wave based on Maxwellian distribution and has acquired great success. However, more and more observations indicate that the Kappa distribution widely exists in various space plasmas. As a non-Maxwellian distribution, it can model the non-uniform plasma following the density-temperature polytropic equation of state. Therefore, the traditional drift wave theory is not suitable in this case. In order to solve this problem, this project plans to study the drift waves of kappa-distributed space plasmas. We will establish the kinetic theory of electrostatic drift waves in kappa-distributed plasmas with inhomogeneous density and temperature, derive the analytic dispersion relation, and analyze the instabilities. This research will improve the understanding of the drift waves in inhomogeneous plasmas. Therefore, this project is of great physical significance.