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α粒子灰在靶板上中性化后成为氦原子,一部分未被抽走,它们在偏滤器等离子体中扩散的平均自由程较长(～10cm)有可能再电离回到SOL,我们如果用RF场的有质动力势将这部分再电离的He~+反射回靶板附近,如同射频堵漏的机理,它的存在又不影响He~(++)继续流向靶板。这种射频有质动力同时又可以将氚离子从偏滤器喉管处反射回主体等离子体,既改善排灰效率又减少氚投料量。本文计算了对排灰效率的影响。
Alpha particle ash neutralizes on the target plate and becomes helium atoms, some of which are not extracted. The longer the average free path of diffusion (~ 10 cm) in the divertor plasma, it is possible to ionize back to SOL. If we use The mass-momentum of the RF field reflects this part of the ionized He ~ + back to the vicinity of the target plate. Like RF plugging mechanism, its presence does not affect He ~ (++) to continue to flow to the target plate. This radio-frequency, dynamic, and at the same time, tritium ions can be reflected back to the body plasma from the divertor throat to both improve ash discharge efficiency and reduce tritium loading. This paper calculates the effect on ash discharge efficiency.