论文标题
$ \ nabla t_e $驱动的CTEM流体模型中的线性分析和跨相动态
Linear analysis and crossphase dynamics in the $\nabla T_e$-driven CTEM fluid model
论文作者
论文摘要
无碰撞捕获的电子模式（CTEM）湍流是融合装置中热和颗粒传输的重要原因。由于涉及大量的传输通道，例如粒子和离子/电子热传输。 $ \ nabla t_e $驱动的CTEM流体模型[Anderson等，等离子体物理。控制。 Fusion 48，651（2006）]提供了一个简化的模型，在与电子温度梯度驱动器相比（$ \ nabla t_e $）相比，密度梯度驱动器可忽视的制度。这提供了一个有趣的模型，用于研究与线性波相关的机制，例如跨相动态，以及其在$ e \ times b $楼梯形成中的可能作用。在这里，$ \ nabla t_e $驱动的CTEM流体模型是从更通用的ITG/TEM模型中得出的，首先对其线性动力学进行了分析，并将其与CTEM Gyrokinetic Simulations与CTEM gyrokinetic模拟进行比较，而无效的动力学动力学将留下非线性分析的未来工作。线性ITG光谱的比较也与其他分析模型进行。
Collisionless trapped-electron mode (CTEM) turbulence is an important contributor to heat and particle transport in fusion devices. The ITG/TEM fluid models are rarely treated analytically, due to the large number of transport channels involved, e.g. particle and ion/electron heat transport. The $\nabla T_e$-driven CTEM fluid model [Anderson et al, Plasma Phys. Control. Fusion 48, 651 (2006)] provides a simplified model, in the regime where the density gradient drive is negligeable compared to the electron temperature gradient drive ($\nabla T_e$). This provides an interesting model to study mechanisms associated to linear waves, such as crossphase dynamics, and its possible role in the formation of $E\times B$ staircase. Here, the $\nabla T_e$-driven CTEM fluid model is rigourously derived from the more general ITG/TEM model, and its linear dynamics is first analyzed and compared with CTEM gyrokinetic simulations with bounce-averaged kinetic electrons, while nonlinear analysis is left for future work. Comparisons of linear ITG spectrum are also made with other analytical models.
