标题： 电子温度梯度驱动湍流中调制不稳定性激发带状流 显示英文标题

标题： Excitation of zonal flow by the modulational instability in electron temperature gradient driven turbulence

摘要： 在电子温度梯度(ETG)驱动的湍流模型中，考虑由小尺度静电漂移波产生大尺度区域能流。产生机制基于有限振幅单色漂移波的调制不稳定性。得到了该不稳定性以及区域能流最优空间尺度的阈值和增长率。 显示英文摘要

摘要： The generation of large-scale zonal flows by small-scale electrostatic drift waves in electron temperature gradient(ETG) driven turbulence model is considered. The generation mechanism is based on the modulational instability of a finite amplitude monochromatic drift wave. The threshold and growth rate of the instability as well as the optimal spatial scale of zonal flow are obtained.