杂质对等离子体平行速度剪切及离子温度梯度不稳定性的影响

Effects of impurity on parallel velocity shear and ion temperature gradient instabilities in plasmas

为综合分析影响磁约束等离子体不稳定性的重要因素，研究了磁剪切平板模型下，同时具有杂质离子及平行流速剪切效应的离子温度梯度（ＩＴＧ）不稳定性的准线性流体理论。分析表明，主要离子与杂质离子的平行流速剪切对不稳定性的影响性质相同。杂质离子的流速剪切及反向密度梯度分布增强了主要离子的温度梯度及流速剪切的驱动机制。

In order to systematically analyse the major driving mechanisms of the turbulence in plasmas, the instability driven by ion temperature gradient, mass flow shear, parallel to the magnetic field, and the impurity ion density gradient in plasmas with multiple ion species is studied in a sheared slab magnetic configuration. Velocity shear effects of impurities and the main ions are similar. The driving mechanisms such as temperature gradient and flow shear of the major ion component are shown to be enhanced by the shear flow and negative density gradient of the impurity ions. The correlations with Tokamak experimental observations arediscussed. 簦酰颍澹纾颍幔洌椋澹睿簦幔睿洌妫欤铮鳎螅瑁澹幔颍铮妫簦瑁澹恚幔辏铮颍椋铮睿悖铮恚穑.Hw/PW @E笮O`XKE`PPP'P/',Ww3;LDQDE=EPEEE3FF)G)G{GH,H.H0HQDE=EPEEE3FF)G Arialemperaturegradient