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1D Model Study on the Effect of Impurity Radiation Cooling in LHD SOL Plasma

机译：LHD SOL等离子体中杂质辐射冷却效应的一维模型研究

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摘要

Increasing heat load to plasma-facing walls in future fusion devices and reactors could exceed the engineering limit of the material if simple scaling is applied in size of device to realize sufficient energy confinement time. One of possible means to remove the heat in plasma is impurity gas puffing. In order to investigate the plasma response to the radiation cooling, a one dimensional steady-state two-fluid model has been developed to describe SOL plasma of LHD. Model equations were solved numerically for various neon density and three types of SOL plasma. Maximum neon density above which plasma does not sustain is found. Significant reduction of temperature and heat flux onto the divertor plate are found. It is confirmed that the neon gas puffing is an effective technique to reduce the heat load onto divertor plates.
机译：如果在设备尺寸上进行简单缩放以实现足够的能量限制时间，则在未来的聚变设备和反应堆中，面对等离子体壁的热负荷增加可能会超过材料的工程极限。去除等离子体中热量的一种可能的方法是吹入杂质气体。为了研究等离子体对辐射冷却的响应，已开发了一个一维稳态两流体模型来描述LHD的SOL等离子体。针对各种氖浓度和三种类型的SOL等离子体对模型方程进行了数值求解。找到了最大氖气密度，高于该密度将无法维持等离子体。发现到分流板上的温度和热通量显着降低。可以肯定的是，霓虹灯吹气是减少分流板上热负荷的有效技术。

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