The trapped electron mode (TEM) and ion temperature gradient (ITG) mode may couple into one hybrid mode or coexist simultaneously, depending on the regime of tokamak plasma parameters. A gyrokinetic integral eigenvalue equation is applied to investigate the coupling of TEM and ITG mode in the presence of tungsten (W) impurity in tokamak geometry of reversed magnetic shear (RMS). Systematic analysis of W impurity effects on the mode characteristics and induced quasi-linear particle flux has been performed in a wide regime of plasma parameters such as density gradient , charge concentration , and charge number of impurity ions, and poloidal wave number spectrum. It is found that both RMS and the impurity ions with inwardly peaked density profile and high charge concentration have strongly stabilizing effects on the modes. Furthermore, the increasing tends to decouple the hybrid mode into coexisting modes or dominating TEM/ITG mode in different parameter regions. The significance of the results for the particle transport of impurity and main ions as well as electrons in advanced tokamaks with W components is discussed.

取决于托卡马克等离子体参数的范围，捕获电子模式（TEM）和离子温度梯度（ITG）模式可以耦合为一种混合模式或同时共存。运用动力学动力学积分特征值方程，研究了在反向磁剪切（RMS）的托卡马克几何形状中存在钨（W）杂质的情况下TEM和ITG模式的耦合。已在各种等离子体参数（例如密度梯度，电荷浓度，杂质离子的电荷数和极性波数）的广泛范围内，系统分析了W杂质对模式特性和诱导的准线性粒子通量的影响。光谱。结果发现，均方根值和具有向内峰值密度分布和高电荷浓度的杂质离子均对模式具有很强的稳定作用。此外，这种增加趋向于将混合模式解耦为共存模式或在不同参数区域中主导TEM / ITG模式。讨论了该结果对于具有W成分的先进托卡马克中杂质和主要离子以及电子的粒子传输的意义。