Relativistic effect on synergy of electron cyclotron and lower hybrid waves on EAST

被引：0
作者：
Ma, Longhao [1 ,2 ]
Xiang, Nong [1 ]
Huang, Yueheng [3 ,4 ]
Hu, Yemin [1 ]
Zhai, Xuemei [1 ]
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
[3] Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
[4] Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China
来源：
PLASMA SCIENCE & TECHNOLOGY | 2021年 / 23卷 / 12期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
electron cyclotron waves; lower hybrid waves; synergy effect; relativistic effect; CURRENT-DRIVEN PLASMA; CURRENT GENERATION; SHIFTED FREQUENCY; ABSORPTION; EFFICIENCY; DIFFUSION;
D O I：
10.1088/2058-6272/ac2249
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
In recent experiments on EAST, the electron temperature at the center can be raised to 9.7 keV by injecting electron cyclotron (EC) and lower hybrid (LH) waves simultaneously. With such strong core electron heating, the relativistic effect could play an important role in the interactions between the plasma and waves. In order to explore the relativistic effect on synergy between the EC and LH waves on EAST, ray-tracing/Fokker-Planck simulations are conducted to investigate electron heating for a typical discharge with a center electron temperature of 9.7 keV. It is found that the relativistic effect can cause the EC wave to deposit its power deeper in the plasma core, where the synergy between the EC and LH waves occurs and enhances the absorption of the LH waves. As a result, a high center electron temperature can be achieved.
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页数：10
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