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首页> 外文期刊>Plasma physics and controlled fusion >A comparison of mid-plane scrape-off-layer measurements with model predictions in MAST and the calculation of cross-field transport coefficients
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A comparison of mid-plane scrape-off-layer measurements with model predictions in MAST and the calculation of cross-field transport coefficients

机译：MAST中的中面刮层测量与模型预测的比较以及跨场传输系数的计算

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摘要

The outboard mid-plane values of electron density (n(e)) and temperature (T-e) in the scrape-off-layer (SOL) of MAST are derived from target Langmuir probe measurements using OSM2-EIRENE and also using a simple two-point model. The values are compared with mid-plane measurements of n(e) and T-e from a reciprocating probe and a Thomson scattering system for Ohmic, L- and H-modes single-null divertor (SND) discharges. The cross-field heat (chi(perpendicular to)) diffusion coefficient at the low field side of SND discharges is derived both using the OSM2-EIRENE model and a two-point model coupled with a simple theory. The results are found to be similar within the errors. Typically chi(perpendicular to) values are found to lie in the range 0.5-2.0 m(2) s(-1) for L-mode and 0.1-0.5 m(2) s(-1) for H-mode. A comparison is made of the transport coefficients derived at the low and high field sides for a set of connected double-null discharges. These results are used to make preliminary observations of the effect of magnetic fields on SOL transport in MAST.
机译：MAST刮除层（SOL）的外侧中平面电子密度（n（e））和温度（Te）值是使用OSM2-EIRENE并使用简单的两个点模型。将这些值与往复式探头和Thomson散射系统对欧姆，L和H模式单零偏滤器（SND）放电的n（e）和T-e的中平面测量值进行比较。利用OSM2-EIRENE模型和结合简单理论的两点模型，得出了SND放电低场侧的跨场热（垂直）扩散系数。发现结果在错误范围内是相似的。通常，发现chi（垂直于）值在L模式下处于0.5-2.0 m（2）s（-1）的范围内，而在H模式下处于0.1-0.5 m（2）s（-1）的范围内。对一组相连的双零放电在低场侧和高场侧导出的传输系数进行了比较。这些结果可用于初步观察磁场对MAST中SOL传输的影响。

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