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A comparison of H-mode pedestal characteristics in MAST as a function of magnetic configuration and ELM type

机译：MAST中H模式基座特性与磁配置和ELM类型的函数比较

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摘要

The H-mode pedestal characteristics on MAST are measured in a variety of connected double null (CDN) and single null divertor (SND) discharges. In CDN discharges the edge density pedestal width in spatial co-ordinates is similar on both the high and the low field sides suggesting that the width may be determined by neutral penetration. However, in SND discharges the density pedestal width appears to be a flux surface quantity, which suggests that the scrape-off-layer may have a role to play in determining the density pedestal width. In both CDN and SND discharges the temperature pedestal width appears to be a flux surface quantity. The pedestal characteristics and edge stability have been studied as a function of the ELM type. The edge temperature pedestal is found to have a weak dependence on rho*(pol), but increases with beta(pol) as Delta(Te) proportional to (beta(pol)) 0.5.
机译：MAST上的H模式基座特性是在各种连接的双零点（CDN）和单零点分流器（SND）放电中测量的。在CDN放电中，高场侧和低场侧的空间坐标中的边缘密度基座宽度相似，这表明宽度可以由中性穿透确定。然而，在SND放电中，密度基座宽度似乎是助焊剂表面量，这表明刮除层可能在确定密度基座宽度方面发挥作用。在CDN和SND放电中，温度基座宽度似乎是助焊剂表面量。研究了基座特性和边缘稳定性与ELM类型的关系。发现边缘温度基座对rho *（pol）的依赖性较弱，但随着β（pol）的增加，Delta（Te）与（β（pol））0.5成正比。

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