Particle balance investigation with the combination of hydrogen barrier model and rate equations of hydrogen state in long duration discharges on all-metal plasma facing wall QUEST
Particle balance investigation with the combination of hydrogen barrier model and rate equations of hydrogen state in long duration discharges on all-metal plasma facing wall QUEST
复制标题
结合氢势垒模型和全金属等离子体面壁长时间放电氢态速率方程进行粒子平衡研究 QUEST
DOI：
10.1088/1741-4326/ab1858
复制
发表时间：
2019
期刊：
影响因子：
3.3
通讯作者：
K.Hanada,N.Yoshida,M.Hasegawa,H.Idei,Y.Nagashima,K.Nakamura,T.Onchi,O.Watanabe,H.Watanabe,K.Tokunaga,A.Higashijima,S.Kawasaki,T.Nagata,S.Shimagukuro,A.Hatayama,K.Okamoto,I.Takagi,T.Hirata,T.Shikama,S.Murakami,H.Long,Z.X.Wang,Y.Oya,S.Kojima,K.Gaku,M.Oya,M.
中科院分区：
文献类型：
--
作者：
田中雅一;石井美保;岩谷彩子;金谷美和;河西瑛里子;山本達也;ケイトリン・コーカー;熊田陽子;川村清志;砂川秀樹;深海菊絵;K.Hanada,N.Yoshida,M.Hasegawa,H.Idei,Y.Nagashima,K.Nakamura,T.Onchi,O.Watanabe,H.Watanabe,K.Tokunaga,A.Higashijima,S.Kawasaki,T.Nagata,S.Shimagukuro,A.Hatayama,K.Okamoto,I.Takagi,T.Hirata,T.Shikama,S.Murakami,H.Long,Z.X.Wang,Y.Oya,S.Kojima,K.Gaku,M.Oya,M.
研究了清华大学稳态球形托卡马克实验（QUEST）长持续放电过程中的燃料粒子平衡。QUEST有全金属等离子体面对墙（PFW），在实验过程中温度控制。通过氘等离子体核反应分析，证实了在等离子体诱导沉积层和金属基底之间的界面处存在氢（H）的输运势垒。利用壁面饱和的性质，提出了一种有效的方法来评估PFW的整体氢通量。燃料粒子的流出通量从PFW后的等离子体终止是成比例的壁存储H的平方，这表明，增强重组的溶解氢在动态保留中发挥了至关重要的作用，并与预测的H-势垒模型。结合壁面模型和H态速率方程的简单计算表明，壁面模型对等离子体密度的时间响应有显著影响。因此，一个适当的壁模型，包括创建H势垒的沉积层的影响，需要开发，即使是全金属PFW设备。
The fuel particle balance during long duration discharges in the Q-shu University Experiment with steady state spherical tokamak (QUEST) was investigated. QUEST has all-metal plasma facing walls (PFWs) that were temperature controlled during the experiments. The presence of a transport barrier for hydrogen (H) at the interface between a plasma-induced deposition layer and metallic substrate was confirmed by nuclear reaction analysis with exposing deuterium plasma. An effective method to evaluate global hydrogen flux to PFWs is proposed, taking advantage of the nature of wall saturation. The outgoing flux of fuel particles from the PFWs just after the plasma termination was proportional to the square of wall-stored H, which indicates that enhanced recombination of solved hydrogen played an essential role in dynamic retention and was in agreement with predictions from the H-barrier model. A simple calculation based on the combination of wall modelling and rate equations of the H states denoted a significant impact of wall modelling on the time response of the plasma density. Hence, a proper wall model including the effects of the deposition layer creating the H barrier is required to be developed, even for all-metal PFW devices.