Suppression of the m/n=2/1 tearing mode by electron cyclotron resonance heating on J-TEXT  

作　　者：方建港 陈忠勇 严伟 王能超 毛飞越 罗蔷 玄子健 陈曦璇 任正康 张峰 黄梅 夏冬辉 杨州军 陈志鹏 丁永华 the J-TEXT Team Jiangang FANG;Zhongyong CHEN;Wei YAN;Nengchao WANG;Feiyue MAO;Qiang LUO;Zijian XUAN;Xixuan CHEN;Zhengkang REN;Feng ZHANG;Mei HUANG;Donghui XIA;Zhoujun YANG;Zhipeng CHEN;Yonghua DING;the J-TEXT Team(State Key Laboratory of Advanced Electromagnetic Technology,International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China;Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China)

机构地区：[1]State Key Laboratory of Advanced Electromagnetic Technology,International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China [2]Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第8期8-17,共10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.2019YFE03010004);the Hubei Provincial Natural Science Foundation of China(No.2022CFA072);National Natural Science Foundation of China(No.51821005)。

摘　　要：Stabilization of tearing modes and neoclassical tearing modes is of great importance for tokamak operation.Electron cyclotron waves(ECWs)have been extensively used to stabilize the tearing modes with the virtue of highly localized power deposition.Complete suppression of the m/n=2/1 tearing mode(TM)by electron cyclotron resonance heating(ECRH)has been achieved successfully on the J-TEXT tokamak.The effects of ECW deposition location and power amplitude on the 2/1 TM suppression have been investigated.It is found that the suppression is more effective when the ECW power is deposited closer to the rational surface.As the ECW power increases to approximately 230 k W,the 2/1 TM can be completely suppressed.The island rotation frequency is increased when the island width is reduced.The experimental results show that the local heating inside the magnetic island and the resulting temperature perturbation increase at the O-point of the island play dominant roles in TM suppression.As the ECW power increases,the 2/1 island is suppressed to smaller island width,and the flow shear also plays a stabilizing effect on small magnetic islands.With the stabilizing contribution of heating and flow shear,the 2/1 TM can be completely suppressed.

关 键 词：tearing mode electron cyclotron resonant heating tearing mode suppression 

分 类 号：TL631.24[核科学技术—核技术及应用]