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Boundary plasma and divertor phenomena in MAST

机译:MAST中的边界等离子体和偏角现象

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The boundary and divertor plasma of a large spherical tokamak (ST), with significant auxilliary heating, is explored in detail for the first time. The extreme geometry of the ST is found to play a key role, giving rise to strong asymmetries in the transport of heat and particle fluxes (including those during ELMs) towards the outer divertor targets. Preliminary modelling reveals the very significant contribution of magnetic flux expansion to the particle flux balance of the ST scrape-off layer. Divertor detachment at the inboard targets is observed in L-mode at moderate core densities for plasmas with up to 1 MW of auxilliary heating. [References: 11]
机译:首次对具有明显辅助加热的大型球形托卡马克(ST)的边界和偏向等离子体进行了详细研究。人们发现,ST的极端几何形状起着关键作用,导致热量和颗粒通量(包括ELM期间)朝着外部偏滤器目标的传递过程中出现了强烈的不对称性。初步建模表明,磁通膨胀对ST刮除层的颗粒通量平衡具有非常重要的作用。对于辅助加热高达1 MW的等离子体,在中等密度的L型下,在L型模式下观察到内侧目标处的分流器脱离。 [参考:11]

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