Guided by the recent experimental finding of the key role played by the ion heat channel in the transition from low (L) to high (H) confinement mode (Ryter et al 2014 Nucl. Fusion 54 083003, Schmidtmayr et al 2018 Nucl. Fusion 58 056003), the present phenomenological model of the power threshold for the L-H transition is developed by combining the energy equipartition between electrons and ions, and the L-mode scaling of the energy confinement time. This heuristic model describes with continuity the transition of the power threshold from the low- to the high-density branches and clarifies the origin of the main dependence of the power threshold on the plasma current in the low density branch.

中文翻译：

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LH过渡功率阈值的启发式模型

在最近的实验发现指导下，离子热通道在从低（L）到高（H）限制模式的转变中发挥了关键作用（Ryter等人2014 Nucl.Fusion 54 083003，Schmidtmayr等人2018 Nucl.Fusion 58 056003），目前的LH跃迁功率阈值的现象学模型是通过结合电子和离子之间的能量均分以及能量限制时间的L模式缩放而建立的。该启发式模型连续地描述了功率阈值从低密度分支到高密度分支的转变，并阐明了功率阈值对低密度分支中的等离子体电流的主要依赖性的起源。