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Critical edge parameters for h-mode transition in DIII-D

机译：DIII-D中h模式转换的关键边缘参数

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摘要

Measurements in DIII-D of edge ion and electron temperatures (T-i and T-e) just prior to the transition to H-mode are presented. A fitting model based on a hyperbolic tangent function is used in the analysis. The edge temperatures are observed to increase during the L-phase with the application of auxiliary heating. The temperature rise is small if the H-mode power threshold is close to the ohmic power level in the absence of auxiliary heating and is large if the H-mode threshold is well above the ohmic power level. The edge temperatures just prier to the transition are approximately proportional to the toroidal magnetic field B-t, for the held either in the reversed or forward direction. However, for the reversed magnetic field, the temperatures are at least a factor of two higher than for the forward direction. [References: 6]
机译：提出了在DIII-D中边缘离子和电子温度（T-i和T-e）即将转变为H模式之前的测量结果。分析中使用了基于双曲正切函数的拟合模型。观察到边缘温度随着辅助加热的施加在L相期间升高。如果在没有辅助加热的情况下H模式功率阈值接近欧姆功率水平，则温度升高较小，而如果H模式阈值远高于欧姆功率水平，则温度升高较大。对于保持反向或正向，刚好过渡的边缘温度大约与环形磁场B-t成正比。但是，对于反向磁场，温度至少比正向温度高两倍。 [参考：6]

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