In this work, we discuss the physics behind the excitation of non‐linear streamer flows in drift wave turbulence and how to selectively excite these flows. Streamer flows are modelled as a non‐linear, radially elongated convective cell in drift wave turbulence. It is shown that density modulation is key for exciting streamer flows. We show that streamer flows have a finite frequency, albeit smaller than that of drift waves. Streamers propagate in the ion direction. These theoretical predictions are compared against experimental data, which shows reasonable agreement. Finally, the scrape‐off layer width set by streamer flows is calculated, and a scaling law against macroscopic plasma parameters is obtained.

中文翻译：

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非线性流光在漂移波湍流中设定的刮擦层宽度

在这项工作中，我们讨论了在漂移波湍流中激发非线性拖缆流动的物理原理，以及如何有选择地激发这些流动。拖缆流被建模为漂移波湍流中的非线性径向延长的对流单元。结果表明，密度调制是激发流光的关键。我们显示出拖缆流具有有限的频率，尽管小于漂移波的频率。拖缆沿离子方向传播。将这些理论预测与实验数据进行比较，实验结果显示出合理的一致性。最后，计算由拖缆流量设定的刮除层宽度，并获得针对宏观等离子体参数的缩放定律。