论文标题

异常的边缘等离子体传输,中性和分离等离子体脱离

Anomalous edge plasma transport, neutrals, and divertor plasma detachment

论文作者

Zhang, Yanzeng, Krasheninnikov, Sergei I., Masline, Rebecca, Smirnov, Roman D.

论文摘要

中立对异常边缘血浆转运和区域流动(ZF)的影响。例如,假定边缘等离子体湍流是由电阻漂移波(RDW)不稳定驱动的。发现中性物的实际效应与抑制不稳定性\ textit {se},而是由于对ZF的影响。尤其是,尽管中性元对RDW不稳定性的线性生长速度几乎没有影响,但它们可以在非线性阶段大大减少纬向流量产生,从而增强了整体异常等离子体的运输。即使仅考虑了RDW的不稳定性,似乎中性对异常边缘传输的影响具有非常通用的特征。可以想象,这种中性诱导的异常血浆转运的增强是在分离的分离转运方案中通过实验观察到的,并伴随着中性密度的强烈增加。

An impact of neutrals on anomalous edge plasma transport and zonal flow (ZF) is considered. As an example, it is assumed that edge plasma turbulence is driven by the resistive drift wave (RDW) instability. It is found that the actual effect of neutrals is not related to a suppression of the instability \textit{per se}, but due to an impact on the ZF. Particularly, it is shown that, whereas the neutrals make very little impact on the linear growth rate of the RDW instability, they can largely reduce the zonal flow generation in the nonlinear stage, which results in an enhancement of the overall anomalous plasma transport. Even though only RDW instability is considered, it seems that such an impact of neutrals on anomalous edge plasma transport has a very generic feature. It is conceivable that such neutral induced enhancement of anomalous plasma transport is observed experimentally in a detached divertor regime, which is accompanied by a strong increase of neutral density.

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