SOLPS analysis of the necessary conditions for detachment cliff

SOLPS analysis of the necessary conditions for detachment cliff
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脱离悬崖必要条件的SOLPS分析

DOI:
10.1088/1741-4326/ab77e6
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发表时间:
2020-03
期刊:
影响因子:
3.3
通讯作者:
Wang Dezhen
Wang Dezhen
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Du Hailong;Zheng Guoyao;Guo Houyang;Jaervinen Aaro E.;Duan Xuru;Bonnin Xavier;Eldon David;Wang Dezhen

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首次使用包括全交叉场漂移的SOLP建模来再现在先前用UEDGE(Jairvinen等人2018年物理)模拟的DIII-D托卡马克中观察到的阶梯式脱离开始。莱特牧师。075001),并进一步研究潜在的物理过程。SOLP分析表明,在DIII-D中,E×B漂移驱动流与碳辐射之间存在很强的相互作用。模拟结果表明,高约束的H模有利于形成这样的脱层悬崖,因为它具有较窄的溶胶宽度和较大的径向梯度,从而增强了极向的E×B漂移。此外,SOLP模拟还表明,在没有额外杂质播种的情况下,碳辐射在DIII-D中脱离悬崖的形成中也起到了关键作用。这些发现对高功率聚变装置稳态运行中偏滤器分离的控制和维护具有重要意义。
SOLPS modeling including full cross-filed drifts is used, for the first time, to reproduce the step-like detachment onset observed in the DIII-D tokamak previously simulated with UEDGE (Jaervinen et al 2018 Phys. Rev. Lett. 121 075001), and to further investigate the underlying physics processes. The SOLPS analysis reveals a strong interplay between the E × B drift-driven flows and carbon radiation in DIII-D. The modeling shows that the high confinement H-mode facilitates the formation of such a detachment cliff due to the narrow SOL width and hence steep radial gradients near the separatrix, which enhances the poloidal E × B drift. Furthermore, the SOLPS modeling indicates that carbon radiation also plays a key role in the formation of the detachment cliff in DIII-D without additional impurity seeding. These findings may have significant implications for the control and maintenance of divertor detachment for the steady-state operation of high power fusion devices.
DOI: 10.1088/1741-4326/ab34d2
发表时间: 2019-10-01
期刊: NUCLEAR FUSION
影响因子: 3.3
作者:
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DOI: 10.1103/physrevlett.121.075001
发表时间: 2018-08
影响因子: 8.6
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期刊: NUCLEAR FUSION
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影响因子: 3.1
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