H-mode pedestal characteristics on MAST
H-mode pedestal characteristics on MAST
复制标题
MAST 上的 H 模式基座特性
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
H. Wilson
中科院分区：
文献类型：
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作者：
A. Kirk;G. Counsell;E. Arends;H. Meyer;D. Taylor;M. Valovic;M. Walsh;H. Wilson
测量了兆安球形托卡马克（MAST）在各种断开双零放电条件下的H模基座特性，研究了边缘局域模（ELMs）对基座的影响。空间坐标中的边缘密度基座宽度在内侧和外侧上是相似的。中性渗透可能能够解释密度基座宽度，但它本身不能解释温度基座的特性。来自MAST的数据可用于通过扩展由其他机器研究的基座碰撞性、磁场、延伸率和纵横比的范围来改进温度基座宽度定标。对流运输被发现占主导地位的能量损失在ELMs和基座能量的分数损失在MAST上的ELM与SOL离子渡越时间比与基座碰撞更好地相关。
The H-mode pedestal characteristics on the mega ampere spherical tokamak (MAST) are measured in a variety of disconnected double null discharges and the effect of edge localized modes (ELMs) on the pedestal is presented. The edge density pedestal width in spatial co-ordinates is similar on both the inboard and outboard sides. Neutral penetration may be able to explain the density pedestal width but it alone cannot explain the characteristics of the temperature pedestal. The data from MAST can be used to improve temperature pedestal width scalings by extending the ranges in pedestal collisionality, magnetic field, elongation and aspect ratio studied by other machines. Convective transport is found to dominate energy losses during ELMs and the fractional loss of pedestal energy during an ELM on MAST correlates better with SOL ion transit time than with pedestal collisionality.