标题： 具有不均匀磁化等离子体中高频静电漂移波的激发的色散关系的详细分析研究 显示英文标题

标题： Excitation of high frequency electrostatic drift waves in inhomogeneous magnetized plasma investigated with detailed analysis of dispersion relation

摘要： 一个具有变系数的二阶非线性方程已被推导出来，用于描述在(2 + 1)时空维度的运动参考系中，不均匀磁化等离子体中高频静电漂移波的动力学行为。 一个具有复系数的三次色散关系已被推导出来，该关系利用流体模型方程解释了高频静电漂移波的激发，以及耦合的离子回旋和漂移波。 通过三次色散关系在参数空间中的三个精确根进行了详细研究，结果表明，由于密度梯度的存在，耦合的高频静电漂移波和离子回旋波会变得不稳定，而在没有碰撞效应的情况下，未耦合的高频静电漂移波是稳定的。 在某些实验室和天体物理等离子体系统（包括托卡马克和太阳日冕）的背景下，探讨了未耦合的高频静电漂移波的激发可能性，这些系统中更有可能存在更陡峭的密度梯度。 显示英文摘要

摘要： A second order nonlinear equation with variable coefficients has been derived to govern the dynamics of high frequency electrostatic drift waves in an inhomogeneous magnetized plasma in a moving frame of (2 + 1) spatio-temporal dimensions. A cubic dispersion relation having complex coefficients has been derived using the fluid model equations which explains the excitation of the high frequency electrostatic drift waves in addition to coupled ion cyclotron and drift waves. This has been studied in detail using the three exact roots of the cubic dispersion relation in the parameter space implying that the coupled high frequency electrostatic drift and ion cyclotron wave becomes unstable solely due to density gradient whereas the uncoupled high frequency electrostatic drift waves are stable in absence of collisional effects. The possibilities of excitation of the uncoupled high frequency electrostatic drift waves have been explored in context of certain laboratory and astrophysical plasma systems including tokamaks and solar corona where existence of steeper density gradients is more probable.