Direct measurements of the intrinsic torque profile in L-mode plasmas on the EAST tokamak have been performed using the balanced neutral beam injection. Co- and counter-current neutral beams are modulated to balance the intrinsic and externally injected torques, which result in the rotation profile close to zero and flat. The experimental results show that the intrinsic torque derived from momentum balance equations is found to be in the co-current direction, peaked in the plasma edge and negligibly small in the core.

中文翻译：

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EAST上固有转矩的初步实验结果

在EAST托卡马克上，对L型等离子体中的固有转矩分布进行了直接测量，方法是使用平衡的中性束注入。并流和逆流中性梁经过调制，以平衡固有和外部注入的扭矩，从而导致旋转曲线接近于零且平坦。实验结果表明，从动量平衡方程式导出的固有转矩在并流方向上，在等离子峰处达到峰值，而在堆芯中则可以忽略不计。