在纬向流动力学中紊流力和新古典粒子损失之间的相互作用
On the interplay between turbulent forces and neoclassical particle losses in Zonal Flow dynamics
摘要：
本文研究了TJ-Ⅱ仿星器中不同等离子体情况下径向电场、雷诺应力梯度和长程相关（LRC）之间的关系。蒙特卡罗模拟表明，径向电场的实验测量范围内的新古典轨道损失的影响。结果表明，尽管湍流加速度的量级与垂直流的新古典阻尼相当，但其与径向电场的依赖性与LRC振幅的演化无关，表明湍流加速度本身不能解释纬向流的动力学。这些结果与湍流和新古典机制之间的相互作用是边缘纬向流动力学的重要组成部分的预期是一致的。
英文摘要：
This study presents the investigation of the connection between radial electric field, gradient of Reynolds stress and Long Range Correlation (LRC), as a proxy for Zonal Flows (ZF), in different plasma scenarios in the TJ-II stellarator. Monte Carlo simulations were made showing that radial electric fields in the range of those experimentally measured have an effect on the neoclassical orbit losses. The results indicate that, despite the order of magnitude of turbulent acceleration is comparable to the neoclassical damping of perpendicular flows, its dependence with radial electric field is not correlated with the evolution of LRC amplitude, indicating that turbulent acceleration alone cannot explain the dynamics of Zonal Flows. These results are in line with the expectation that the interplay between turbulent and neoclassical mechanisms is a crucial ingredient of the dynamics of edge Zonal Flows.
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