Abstract Understanding the influence of edge toroidal rotation in confined plasmas on the L-H transition is important for improving the plasma performance of future fusion devices. We report the results of experiments on the Experimental Advanced Superconducting Tokamak (EAST) to study this relationship. We used edge toroidal charge exchange recombination spectroscopy (eCXRS) as a diagnostic to study edge toroidal rotation. By analyzing the contribution of each term in the radial electric field, our experimental results show how the L-H transition depends on the edge toroidal rotation. Generally, the power of the transition increases with increasing edge toroidal rotation. The observed reduction of injected power can be explained by the change of the edge radial electric field. This reduced power threshold at lower toroidal rotation could provide an important benefit for inherently low-rotation plasma devices such as ITER and the China Fusion Engineering Test Reactor (CFETR).

中文翻译：

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EAST 上 CXRS 诊断的边缘环形旋转分析

摘要 了解受限等离子体中边缘环形旋转对 LH 跃迁的影响对于提高未来聚变装置的等离子体性能非常重要。我们报告了实验先进超导托卡马克 (EAST) 的实验结果，以研究这种关系。我们使用边缘环形电荷交换重组光谱 (eCXRS) 作为研究边缘环形旋转的诊断方法。通过分析径向电场中每一项的贡献，我们的实验结果表明 LH 转变如何取决于边缘环形旋转。通常，过渡的功率随着边缘环形旋转的增加而增加。观察到的注入功率的减少可以通过边缘径向电场的变化来解释。