The investigation of quasi coherent mode on EAST using Doppler reflectometry  

作　　者：Jiaxu JI Adi LIU Chu ZHOU Xi FENG Shouxin WANG Haiqing LIU Hailin ZHAO Yong LIU Jin ZHANG Zhaoyang LIU Xiaoming ZHONG Hongrui FAN Ge ZHUANG Jinlin XIE Tao LAN Wenzhe MAO Weixing DING Hong LI Zixi LIU Wandong LIU 季佳旭;刘阿娣;周楚;冯喜;王守信;刘海庆;赵海林;刘永;张津;刘朝阳;仲小明;范泓锐;庄革;谢锦林;兰涛;毛文哲;丁卫星;李弘;刘子奚;刘万东(School of Nuclear Sciences and Technology,University of Science and Technology of China,Hefei 230026,People's Republic of China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China)

机构地区：[1]School of Nuclear Sciences and Technology,University of Science and Technology of China,Hefei 230026,People's Republic of China [2]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China

出　　处：《Plasma Science and Technology》2021年第9期60-64,共5页等离子体科学和技术（英文版）

基　　金：supported in part by the National MCF Energy R&D Program of China(Nos.2018YFE0311200,2017YFE0301204 and 2017YFE0301700);National Natural Science Foundation of China(Nos.11635008,U1967206 and 11975231)。

摘　　要：An electrostatic Quasi coherent mode has been observed in density fluctuations and perpendicular velocity fluctuations with the frequency range of 3–80 k Hz on the Experimental Advanced Superconducting Tokamak using multi-channel Doppler reflectometry.It appears in the edge localized mode(ELM)-free period after L-H transition or in the inter-ELM period.The mode rotates almost together with the plasma with the poloidal wave number around 0.6cm-1 and its frequency chirps with plasma poloidal velocity.The mode can exist in a large radial coverage(ρ=0.75–0.98),and peaks near the top of pedestal,suggesting that it might be excited in the steep gradient pedestal region,and spread into the core area.

关 键 词：H-MODE TURBULENCE quasi coherent mode doppler reflectometry 

分 类 号：TL631.24[核科学技术—核技术及应用]