The influence of m / n = 2/1 ( m and n are poloidal and toroidal mode numbers) tearing modes on plasma perpendicular flows and micro-fluctuations has been investigated in HL-2A neutral beam injection heated L-mode plasmas. It is found that the local perpendicular rotation velocity and turbulence energy are modulated by the alternation between the island X-point and O-point of the naturally rotating tearing modes. Cross-correlation analysis indicates that the modulation of density fluctuations by the tearing mode is not only limited to the island region, but also occurs in the edge region near the last closed flux surface. The turbulence exhibits distinct spectral characteristics inside and outside the island region. In addition, it is observed that the particle flux near the strike point is also significantly impacted by the tearing modes. The experimental evidence reveals that there are strong core-edge interactions between the core tearing modes and th...

中文翻译：

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HL-2A等离子体中撕裂模式与微湍流之间的多尺度相互作用

m / n = 2/1（m和n分别为极化和环形模数）的撕裂模式对等离子体垂直流和微波动的影响已在HL-2A中性束注入加热的L型等离子体中进行了研究。研究发现，自然旋转撕裂模的岛状X点和O点之间的交替调制了局部垂直旋转速度和湍流能量。互相关分析表明，撕裂模式对密度波动的调制不仅限于岛状区域，而且还发生在最后一个封闭通量表面附近的边缘区域。湍流在岛区域的内部和外部表现出独特的光谱特性。另外，观察到在冲击点附近的粒子通量也受到撕裂模式的显着影响。