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ELMs and asymmetries at the COMPASS-D boundary

机译：在COMPASS-D边界处的ELM和不对称

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In this paper we report the effect of both edge localized modes (ELMs) and drifts on divertor plasma parameters in COMPASS-D. Profile changes during ELMs are measured with high spatial resolution, and power and particle losses per ELM are estimated. The time evolution of the divertor parameters is shown to be consistent with the ELM being associated with a fast collapse of the transport barrier. Asymmetries between inboard and outboard divertor targets in L-mode plasmas are shown to depend on the plasma parameters, in particular the direction of the toroidal magnetic field, the average plasma density and the input power. In general, the outer divertor region receives more power than the inner one, the asymmetry increasing for ion del B drift away from the X-point, contrary to observation in other devices. The E x B drift together with scrape-off layer (SOL) currents are suggested as possible mechanisms causing the asymmetry. [References: 14]
机译：在本文中，我们报告了边缘局部模式（ELM）和漂移对COMPASS-D中偏滤器等离子体参数的影响。以高空间分辨率测量ELM期间的轮廓变化，并估算每个ELM的功率和颗粒损耗。显示了偏滤器参数的时间演变与ELM与运输壁垒的快速崩溃相一致。示出了L模式等离子体中的内侧和外侧偏滤器目标之间的不对称性取决于等离子体参数，特别是环形磁场的方向，平均等离子体密度和输入功率。通常，外部分流器区域比内部分流器区域接收的功率更多，与其他器件中观察到的相反，离子del B偏离X点的不对称性增加。建议使用E x B漂移和刮除层（SOL）电流作为引起不对称的可能机制。 [参考：14]

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