Influence of the X-point location on edge plasma transport in the J-TEXT tokamak with a high-field-side single-null divertor

被引：0
作者：
王灏 [1 ]
梁云峰 [1 ,2 ,3 ]
徐帅 [2 ]
江中和 [1 ]
冯玉和 [4 ]
A KNIEPS [2 ]
P DREWS [2 ]
阳杰 [1 ]
徐鑫 [1 ]
龙婷 [5 ]
焦少东 [1 ]
张晓龙 [6 ]
郝志刚 [1 ]
杨庆龙 [1 ]
陈志鹏 [1 ]
陈忠勇 [1 ]
王能超 [1 ]
杨州军 [1 ]
张晓卿 [1 ]
丁永华 [1 ]
潘垣 [1 ]
the J-TEXT Team [1 ]
机构：
[1] International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Tech
[2] Forschungszentrum Jülich Gmb H, Institut für Energie-und Klimaforschung-Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC)
[3] Institute of Plasma Physics, Chinese Academy of Sciences
[4] Max-Planck-Institut fur Plasmaphysik, EURATOM Association
[5] Southwestern Institute of Physics
[6] Advanced Energy Research Center, Shenzhen University
来源：
Plasma Science and Technology | 2021年 / 23卷 / 12期
基金：
中国国家自然科学基金;
关键词：
D O I：
暂无
中图分类号：
TL631.24 [];
学科分类号：
082701 ;
摘要：
High-density experiments in the high-field-side mid-plane single-null divertor configuration have been performed for the first time on J-TEXT. The experiments show an increase in the highest central channel line-averaged density from 2.73×1019m-3to 6.49×1019m-3, while the X-point moves away from the target by increasing the divertor coil current. The corresponding Greenwald fraction rises from 0.50 to 0.79. For the impurity transport, the density normalized radiation intensity(absolute extreme ultraviolet and soft x-ray) of the central channel density decreased significantly(>50%) with an increase in the plasma density. To better understand the underlying physics mechanisms, the 3 D edge Monte Carlo code coupled with EIRENE(EMC3-EIRENE) has been implemented for the first time on J-TEXT. The simulation results show good agreement with the experimental findings. As the X-point moves away from the target, the divertor power decay length drops and the scrape-off layer impurity screening effect is enhanced.
引用
收藏
页码：49 / 61
页数：13
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