The 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 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 non-linear 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, i.e. neutrals enhance the transport via the reduction of ZF, 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,...

中文翻译：

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中性对异常边缘等离子体传输的影响及其与偏滤器等离子体脱离的关系

考虑了中性点对异常边缘等离子体传输和纬向流（ZF）的影响。例如，假设边缘等离子体湍流是由电阻漂移波（RDW）的不稳定性驱动的。发现中性点的实际作用与抑制不稳定性本身无关，而是由于对ZF的影响。特别是表明，尽管中性粒子对RDW不稳定的线性增长率几乎没有影响，但它们可以大大减少非线性阶段的纬向流生成，从而导致总体异常等离子体传输增强。尽管仅考虑了RDW的不稳定性，但中性分子对异常边缘等离子体传输的影响（即中性分子通过降低ZF来增强传输）似乎具有非常普遍的特征。