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

作　　者：Hao WANG Yunfeng LIANG Shuai XU Zhonghe JIANG Yuhe FENG A KNIEPS P DREWS Jie YANG Xin XU Ting LONG Shaodong JIAO Xiaolong ZHANG Zhigang HAO Qinglong YANG Zhipeng CHEN Zhongyong CHEN Nengchao WANG Zhoujun YANG Xiaoqing ZHANG Yonghua DING Yuan PAN the J-TEXT Team 王灏;梁云峰;徐帅;江中和;冯玉和;A KNIEPS;P DREWS;阳杰;徐鑫;龙婷;焦少东;张晓龙;郝志刚;杨庆龙;陈志鹏;陈忠勇;王能超;杨州军;张晓卿;丁永华;潘垣;the J-TEXT Team(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 Technology,Wuhan 430074,People's Republic of China;Forschungszentrum Julich GmbH,Institut fur Energie-und Klimaforschung-Plasmaphysik,Partner of the Trilateral Euregio Cluster(TEC),52425 Jiilich,Germany;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China;Max-Planck-Institut fur Plasmaphysik,EURATOM Association,17491 Greifswald,Germany;Southwestern Institute of Physics,Chengdu 610041,People's Republic of China;Advanced Energy Research Center,Shenzhen University,Shenzhen 518060,People's Republic of China)

机构地区：[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 Technology,Wuhan 430074,People's Republic of China [2]Forschungszentrum Julich GmbH,Institut fur Energie-und Klimaforschung-Plasmaphysik,Partner of the Trilateral Euregio Cluster(TEC),52425 Jiilich,Germany [3]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China [4]Max-Planck-Institut fur Plasmaphysik,EURATOM Association,17491 Greifswald,Germany [5]Southwestern Institute of Physics,Chengdu 610041,People's Republic of China [6]Advanced Energy Research Center,Shenzhen University,Shenzhen 518060,People's Republic of China

出　　处：《Plasma Science and Technology》2021年第12期42-54,共13页等离子体科学和技术（英文版）

基　　金：supported by the National Magnetic Confinement Fusion Energy R&D Program of China (Nos.2018YFE0301104 and 2018YFE0309100);National Natural Science Foundation of China (No. 51821005).

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 2.73×10^(19)m^(-3) to 6.49×10^(19)m^(-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.

关 键 词：edge plasma transport divertor configuration EMC3-EIRENE 

分 类 号：TL631.24[核科学技术—核技术及应用]