Impacts of Lithium Injection Positions on Lithium Transport and Heat Flux on EAST with EMC3-EIRENE Modelling

IF 1.9 4区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Journal of Fusion Energy Pub Date : 2023-08-23 DOI:10.1007/s10894-023-00376-6

Z. X. Wen, G. D. Gao, B. Liu, Y. T. Chen, L. Z. Liu, S. Y. Dai

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Abstract

The modelling of the edge lithium (Li) transport and heat flux deposition on divertor targets under different poloidal Li injections has been performed on EAST with the three-dimensional (3D) edge transport code EMC3-EIRENE. Four injected positions of Li impurity (including divertor and upstream injections) are investigated to check the Li density distribution and its impacts on the heat flux deposition profiles. The simulation results show that the Li injections near the strike points lead to small spatial amounts of Li ions compared to the upstream injections. The energy dissipation by Li impurity for different poloidal injections has been analysed by varying the upstream electron density. It is found that the increased upstream electron density leads to a slightly enhanced exhausted power of Li impurity for upstream injections while an evidently reduced energy loss for divertor injections. Moreover, the asymmetric distributions of heat flux deposition on target plates are obtained for divertor injections, while the symmetric distributions of heat flux are attained for upstream injections.

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基于EMC3-EIRENE模型的注锂位置对东部锂输运和热通量的影响

利用三维边缘输运代码EMC3-EIRENE，在EAST上模拟了不同极性锂注入条件下，导流器靶上的锂离子边缘输运和热流沉积。研究了锂杂质注入的四个位置(包括导流器注入和上游注入)，考察了锂密度分布及其对热流沉积剖面的影响。模拟结果表明，与上游注入相比，靠近击打点的Li注入导致的空间Li离子量较小。通过改变上游电子密度，分析了锂杂质在不同极性注入下的能量耗散。发现上游电子密度的增加导致上游注入的锂杂质耗散功率略有增加，而分流剂注入的能量损失明显降低。此外，对于分流注入，靶板上的热流密度分布是不对称的，而对于上游注入，热流密度分布是对称的。

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来源期刊

Journal of Fusion Energy 工程技术-核科学技术

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

2.3 months

期刊介绍： The Journal of Fusion Energy features original research contributions and review papers examining and the development and enhancing the knowledge base of thermonuclear fusion as a potential power source. It is designed to serve as a journal of record for the publication of original research results in fundamental and applied physics, applied science and technological development. The journal publishes qualified papers based on peer reviews. This journal also provides a forum for discussing broader policies and strategies that have played, and will continue to play, a crucial role in fusion programs. In keeping with this theme, readers will find articles covering an array of important matters concerning strategy and program direction.