Characteristics of the SOL ion-to-electron temperature ratio on the J-TEXT tokamak with different plasma configurations  

作　　者：李存凯 梁云峰 江中和 周松 华建坤 阳杰 杨庆虎 Alexander KNIEPS Philipp DREWS 徐鑫 毛飞越 谢伟 杨雨桐 郭金龙 李杨波 任正康 陈志鹏 王能超 the J-TEXT Team Cunkai LI;Yunfeng LIANG;Zhonghe JIANG;Song ZHOU;Jiankun HUA;Jie YANG;Qinghu YANG;Alexander KNIEPS;Philipp DREWS;Xin XU;Feiyue MAO;Wei XIE;Yutong YANG;Jinlong GUO;Yangbo LI;Zhengkang REN;Zhipeng CHEN;Nengchao WANG;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),Julich 52425,Germany;不详)

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 Jülich GmbH,Institut für Energie-und Klimaforschung—Plasmaphysik,Partner of the Trilateral Euregio Cluster(TEC),Julich 52425,Germany [3]不详

出　　处：《Plasma Science and Technology》2024年第2期13-21,共9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 (No.2018YFE0309100);National Natural Science Foundation of China (No.51821005)。

摘　　要：Accurate measurement of the average plasma parameters in the edge region,including the temperature and density of electrons and ions,is critical for understanding the characteristics of the scrape-off layer(SOL) and divertor plasma transport in magnetically confined fusion research.On the J-TEXT tokamak,a multi-channel retarding field analyzer(RFA) probe has been developed to study average plasma parameters in the edge region under various poloidal divertor and island divertor configurations.The edge radial profile of the ion-to-electron temperature ratio,τ_(i/e),has been determined,which gradually decreases as the SOL ion self-collisionality,v_(SOL)*,increases.This is broadly consistent with what has been observed previously from various tokamak experiments.However,the comparison of experimental results under different configurations shows that in the poloidal divertor configuration,even under the same v_(SOL)*,τ_(i/e) in the SOL region becomes smaller as the distance from the X-point to the target plate increases.In the island divertor configuration,τ_(i/e) near the O-point is higher than that near the X-point at the same v_(SOL)*,and both are higher than those in the limiter configuration.These results suggest that the magnetic configuration plays a critical role in the energy distributions between electrons and ions at the plasma boundary.

关 键 词：ion temperature island divertor poloidal divertor retarding field analyzer(RFA)probe 

分 类 号：TL631.24[核科学技术—核技术及应用]