Langmuir probes and a Mach probe were used for measuring edge fluctuations and parallel plasma flow, respectively, on the CT-6B tokamak. A maximum radial gradient in parallel flow was observed to be located roughly at the maximum Er shear layer (or, namely, the poloidal velocity shear layer). Er shear is found to be very possibly consistent with a regulating effect on edge turbulence features. Non-linear analysis indicates that non-linear phase coupling in turbulence may be influenced by Er shear, or that there exist coherent structures induced by strong Er shear, and the phase coupling processes show an intermittent character. The results provide some new observations for a better understanding of the basic mechanisms of edge turbulence.
Langmuir探针和Mach探针被用于在CT-6B托卡马克上测量边缘涨落和平行等离子体流。观察到平行流的最大径向梯度位于Er剪切层（即极向速度剪切层）的最大值附近。发现Er剪切很可能与边缘湍流特性的调节作用一致。非线性分析表明，湍流中的非线性相位耦合可能受到Er剪切的影响，或者存在由强Er剪切诱导的相干结构，且相位耦合过程表现出间歇性特征。这些结果为深入理解边缘湍流的基本机制提供了新的观测依据。