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在KT-5C托卡马克上,利用外加驱动的静电探针调制等离子体边缘湍动的实验研究,不仅验证TEXT装置上的结果:外部激发的扰动能沿着磁场长距离传播,而横向传播尺度很短。并且还通过新的实验,观察到扰动传播的方向性和粒子种类相关性,显示了这种扰动沿着磁力线方向的长程传播实际上是由于对电子运动的调制而发生,是一种粒子模式。由动力学分析表明,在托卡马克等离子体中传播的这种模式可以用弹道模理论给出与实验结果完全一致的解释。
In the KT-5C tokamak, the experimental study of plasma edge turbulence using an externally driven electrostatic probe not only verifies the results on a TEXT device: the external excitation perturbation can propagate long distances along the magnetic field, while the transverse propagation scale very short. And through the new experiment, the perturbation propagation direction and particle type correlation are observed. It shows that the long-distance propagation of this disturbance in the direction of the magnetic flux is actually a particle mode due to the modulation of electron motion. Kinetic analysis shows that this mode of propagation in tokamak plasma can be completely consistent with the experimental results using ballistic theory.