标题： 磁化几何中由次级不稳定性引起的纬向流的非线性增长 显示英文标题

标题： Nonlinear growth of zonal flows by secondary instability in general magnetic geometry

摘要： 我们提出了一种关于磁化等离子体湍流中纬向流非线性增长的理论，该理论是通过次级不稳定性机制提出的。 该理论适用于一般的磁几何结构，因此既适用于托卡马克装置也适用于 stellarators。 预测的增长率与非线性gyrokinetic模拟结果相比表现出良好的一致性，误差大小符合理论中小参数的预期比例。 显示英文摘要

摘要： We present a theory of the nonlinear growth of zonal flows in magnetized plasma turbulence, by the mechanism of secondary instability. The theory is derived for general magnetic geometry, and is thus applicable to both tokamaks and stellarators. The predicted growth rate is shown to compare favorably with nonlinear gyrokinetic simulations, with the error scaling as expected with the small parameter of the theory.