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Comparison of H-mode pedestals in different confinement regimes in DIII-D

机译:DIII-D中不同限制条件下的H型基座比较

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摘要

A survey of global performance parameters and their correlation with pedestal parameters is performed for standard H-mode, QH-mode and the enhanced confinement regimes of VH-mode, hybrid and advanced tokamak in the DIII-D tokamak. This study shows that there is a trend for global confinement quality or global beta to increase as the pedestal electron pressure or beta increases. However, there are also improvements in core confinement and beta, observed at fixed pedestal pressure or beta, which indicate that factors other than pedestal parameters also contribute to the best core performance. Several other pedestal structure parameters are found to be similar among these regimes. The scale lengths for electron pressure in the pedestal are in the range 0.8-1.6 cm at the outer midplane, most 77, values are in the range 1-3 in the middle of the T-e pedestal and the T-e and n(e) pedestals tend to penetrate the same distance into the plasma.
机译:针对标准H模式,QH模式以及DIII-D托卡马克中VH模式,混合和高级托卡马克的增强约束机制,对全局性能参数及其与基座参数的相关性进行了调查。这项研究表明,随着基座电子压力或β的增加,整体限制质量或整体β的趋势也随之增加。但是,在固定的基座压力或beta下观察到的岩心约束和β值也有所改善,这表明除基座参数外的其他因素也有助于实现最佳的岩心性能。在这些方案中,发现其他几个基座结构参数也相似。基座中电子压力的标度长度在外中平面处在0.8-1.6 cm的范围内,最多77个,在Te基座的中间值在1-3的范围内,Te和n(e)基座趋于穿透相同距离的等离子体

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