Recent Progress in Modeling of CFETR Plasma Profiles from Core to Edge
Recent Progress in Modeling of CFETR Plasma Profiles from Core to Edge
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DOI：
10.1007/s10894-021-00292-7
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发表时间：
2021-03
影响因子：
1.1
通讯作者：
Jiale Chen;G. Jia;N. Xiang
中科院分区：
文献类型：
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作者：
Jiale Chen;G. Jia;N. Xiang
在CFETR物理设计的基础上，对核心等离子体和边缘等离子体进行了模拟研究，以适应从核心到边缘的等离子体分布。描述了核等离子体模型和边缘等离子体模型之间的耦合。分别介绍了堆芯-基座一体化模拟堆芯等离子体和SOLPS模拟堆芯-SOL-偏滤器区等离子体的最新进展。在堆芯等离子体性能的优化研究中发现，在CFETR混合方案中，中等的基座顶部Zeff（~ 2.2）和高的分界线密度与基座密度之比（nsep/nped~ 0.5）有利于获得高的聚变增益。用SOLPS程序对边缘等离子体进行了数值模拟，结果表明，采用氖或氩杂质籽晶可以使偏滤器靶上的稳态功率密度降低到可接受的水平（< 10 MW/m2），但Zeff仍然很高（Zeff~ 3）。未来的工作，以提高核心和边缘等离子体的模拟之间的一致性进行了讨论。
Simulation studies of core plasmas and edge plasmas are performed in ASIPP to accommodate plasma profiles from core to edge based on physics modeling for the CFETR physics design. The coupling between the modeling for core plasmas and edge plasmas are described. The recent progress of the integrated core-pedestal simulations for core plasmas and the SOLPS simulations for plasmas in pedestal-SOL-divertor region are presented, respectively. In the optimization study for core plasma performance, moderateZeff(~ 2.2) at pedestal top and a high ratio of density at separatrix to density at pedestal (nsep/nped~ 0.5) are found to be beneficial for the achievement of a high fusion gain in CFETR hybrid scenarios. The edge plasma simulations using the SOLPS code show that using either neon or argon impurity seeding can reduce the stationary power density on the divertor target to an acceptable level (< 10 MW/m2) butZeffat pedestal top is still high (Zeff~ 3). Future works to improve the consistence between the simulations of core and edge plasmas are discussed.