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Investigation of electron cyclotron current drive efficiency on the J-TEXT tokamak

Plasma Science and Technology 2022年第12期24卷 183-189页

作者： Jiangang FANG Wei YAN Zhongyong CHEN Xiaobo ZHANG Xixuan CHEN Junli ZHANG Feiyue MAO You LI Lingke MOU Yu ZHONG Feng Li Weikang ZHANG Fanxi LIU Guinan ZOU Song ZHOU Da LI Li GAO Donghui XIA Zhoujun YANG Zhipeng CHEN Nengchao WANG Yonghua DING Yunfeng LIANG Yuan PAN the J-TEXT Team International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikD-52425 JülichGermany

Electron cyclotron current drive(ECCD) efficiency research is of great importance for the neoclassical tearing mode(NTM) *** ECCD efficiency is beneficial for the NTM stabilization and the ECCD power threshold *** efficiency has been investigated on the J-TEXT *** electron cyclotron wave(ECW) power scan was performed to obtain the current drive *** current drive efficiency is derived to be approximately η_(0)=(0.06-0.16)×10^(19)A m^(-2)W^(-1)on the J-TEXT *** effect of the residual toroidal electric field has been included in the determination of the current drive efficiency,which will enhance the ECCD *** the plasma current of I_(p)=100 kA and electron density of n_(e)=1.5×10^(19)m^(-3),the ratio of Spitzer conductivity between omhic(OH)and ECCD phases is considered and the experimental data have been *** correction results show that the current drive efficiency η_(1)caused by the fast electron hot conductivity decreases by approximately 79%.It can be estimated that the driven current is approximately 24 kA at 300 kW ECW power.

关键词： electron cyclotron current drive current drive efficiency residual toroidal electric field

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Numerical simulation of electron cyclotron current drive characteristics on EAST

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Chinese Physics B 2014年第5期23卷 385-391页

作者：韦维丁伯江张新军王晓洁李妙辉孔二华张磊 Institute of Plasma Physics Chinese Academy of Sciences Hefei University of Technology

Electron cyclotron current drive （ECCD） will be applied in the EAST tokamak during its the new campaign. In order to provide theoretical predictions for relevant physical experiments, some numerical simulations of ECCD with the parameters of EAST have been can＇ied out by using TORAY-GA code based on the understanding of ECCD mechanisms. ECCD efficiencies achieved in different plasma and electron cyclotron （EC） wave parameters are given. The dependences of ECCD characteristics on EC wave injection angle, toroidal magnetic field, plasma density, and temperature are presented and discussed.

关键词： EAST electron cyclotron current drive current drive efficiency

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