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首页> 外文期刊>Plasma physics and controlled fusion >Reduction of edge plasma turbulence via cross-phase decrease by zonal fields
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Reduction of edge plasma turbulence via cross-phase decrease by zonal fields

机译:通过Zonal田地通过交叉阶段减少减少边缘等离子体湍流

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摘要

Transport of the near-adiabatic plasma is simulated numerically. The zonal flow (ZF) V along the poloidal direction is found to emerge self-consistently from the non-zonal turbulence. Zonal fields are found to feed back to turbulence by reducing the cross phase. As a result the turbulence is localized with depressed peaks. Turbulence is very low and the cross phase delta is negative near V = 0, where the gradient V' (vorticity) of ZF along the radial direction is large. The fluctuations are almost localized where the zonal-density gradient (n) over bar' is a positive peak and V is locally large. Positive ( n) over bar' or positive V '' is shown to reduce the cross phase between the electric potential and the density fluctuation.
机译:数值模拟近绝压等离子体的运输。 发现沿各个方向的区流(ZF)V从非扎带湍流中始终出来。 通过减少交叉阶段,发现区域磁场通过减少交叉阶段来送回湍流。 结果,湍流是用凹陷峰的局部化。 湍流非常低,交叉阶段δ为负接近v = 0,其中沿径向径向的Zf的梯度V'(涡度)大。 波动几乎是本地化的,其中rel rad'是正峰,V是局部大的。 显示正(n)rad'或正v'',以减少电位与密度波动之间的交叉相位。

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