The core toroidal plasma intrinsic rotation has been studied by experiments and simulations in the Joint Texas Experimental Tokamak (J-TEXT). The direction of core intrinsic rotation in the J-TEXT plasma is counter-current. As the plasma density ramps up, the rotation velocity increases in the counter-current direction. By comparing four different electron densities, linear local gyrokinetic simulations have been performed by the Gyrokinetic Electromagnetic Numerical Experiment code for the first time on J-TEXT. It is found that the most dominant turbulence is the ion temperature gradient at $0.2a$ , where $a$ is the minor radius of the plasma and this is unchanged during the plasma density ramp up. By scanning the radial wave vectors, it is found that the residual stress term reverses from negative to positive when the plasma density exceeds a certain threshold. The pinch term is larger than the residual stress term at all four electron densities, which means that the pinch term is always dominant in the core of a J-TEXT plasma.

中文翻译：

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在联合德克萨斯实验托卡马克中，通过陀螺运动电磁数值实验代码研究固有旋转

已经通过联合德克萨斯实验托卡马克 (J-TEXT) 中的实验和模拟研究了核心环形等离子体固有旋转。J-TEXT 等离子体中核心固有旋转的方向是逆流的。随着等离子体密度的增加，旋转速度沿逆流方向增加。通过比较四种不同的电子密度，陀螺动力学电磁数值实验代码首次在 J-TEXT 上进行了线性局部陀螺动力学模拟。发现最主要的湍流是 $0.2a$ 处的离子温度梯度，其中 $a$ 是等离子体的小半径，这在等离子体密度上升期间保持不变。通过扫描径向波矢量，发现当等离子体密度超过一定阈值时，残余应力项由负反转为正。在所有四个电子密度下，夹点项都大于残余应力项，这意味着夹点项始终在 J-TEXT 等离子体的核心中占主导地位。