A reproducible stationary improved confinement mode (I-mode) has been achieved recently in the Experimental Advanced Superconducting Tokamak (EAST), featuring good confinement without particle transport barrier. The microscopic mechanism of sustaining stationary I-mode, based on the coupling between turbulence transitions and the edge temperature oscillation, has been discovered for the first time. A radially localized edge temperature ring oscillation (ETRO) with azimuthally symmetric structure ( n = 0, m = 0) has been identified and it is accompanied by alternating turbulence transitions between an electron diamagnetic drift turbulence (ET) and an ion diamagnetic drift turbulence (IT). The transition is controlled by local electron temperature gradient and strong non-linear couplings between weak coherent mode (WCM) and ET could be identified near the pedestal top, suggesting the unique status of the pedestal top region in sustaining the stationary I-mode confinem...

中文翻译：

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边缘温度环振荡和基座顶部附近交替湍流过渡的实验识别，以维持平稳的I模式

最近在实验高级超导托卡马克（EAST）中实现了可重现的静态改进限制模式（I-mode），该模式具有良好的限制而没有粒子传输障碍。首次发现了基于湍流过渡和边缘温度振荡之间的耦合而维持静止I模式的微观机制。已经确定了具有方位角对称结构（n = 0，m = 0）的径向局部边缘温度环振荡（ETRO），并且伴随着电子反磁漂移湍流（ET）和离子反磁漂移湍流（它）。