Investigation of lower hybrid current drive during H-mode in EAST tokamak

H-mode discharges with lower hybrid current drive （LHCD） alone are achieved in EAST divertor plasma over a wide parameter range. These H-mode discharges are characterized by a sudden drop in Da emission and a spontaneous rise in main plasma density. Good lower hybrid （LH） coupling during H-mode is o...

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Bibliographic Details
Published in:Chinese physics B 2011-12, Vol.20 (12), p.298-304
Main Author: 李妙辉 丁伯江 孔二华 张磊 张新军 钱金平 颜宁 韩效锋 单家方 刘甫坤 王茂 徐旵东 万宝年
Format: Article
Language:English
Subjects:
Antennas
Density
Deposition
Emission
H模式放电
Joining
Pipe
Plasma (physics)
Plasma density
Tokamak devices
东亚
低杂波电流驱动
参数范围
托卡马克
模式耦合
电流驱动器
等离子体密度
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Summary:H-mode discharges with lower hybrid current drive （LHCD） alone are achieved in EAST divertor plasma over a wide parameter range. These H-mode discharges are characterized by a sudden drop in Da emission and a spontaneous rise in main plasma density. Good lower hybrid （LH） coupling during H-mode is obtained by putting the plasma close to the antenna and by injecting D2 gas from a pipe near the grill mouse. The analysis of lower hybrid current drive properties shows that the LH deposition profile shifts off axis during H-mode, and current drive （CD） efficiency decreases due to the increase in density. Modeling results of H-mode discharges with a general ray trueing code GENRAY are reported.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/20/12/125202