托卡马克芯部等离子体微观不稳定性研究

在Weiland模型的基础上,考虑碰撞效应的双流体方程,获得了托卡马克等离子体芯部区域ITG（离子温度梯度模）和TEM（捕获电子模）的色散关系,分析了归一化温度梯度和密度梯度以及归一化径向坐标对这两种模式增长率的影响。计算结果表明等离子体密度梯度对离子温度梯度模有致稳作用,而对捕获电子模模有促进作用。两种模的增长率都随各自温度梯度和归一化径向坐标的增大而不同程度增大。

Study of Microinstability in Tokamak Core Plasma

With the dispersion relation of the ion temperature gradient mode（ ITG） and the trapped electron mode（ TEM） derived from the Weiland model,where the two fluid equations with the collision term are used,the effects of the normalized temperature gradient,the normalized density gradient and the normalized radial coordiante on the growth rates of these two modes are analyzed. The computation results indicate that the ion temperature gradient modes are stablized by the plasma density gradient and the traped electron mode is destabilized by the density gradient. The growth rate of both modes increase with plasma temperature gradient and the radial coordinate.