Recent Results of LHCD Experiments in EAST

DING Bojiang; KONG Erhua; LI Miaohui; QIN Yongliang; ZHANG Lei; A. EKEDAHL; Y. PEYSSON; WANG Mao; XU Handong; HU Huaichuan; HUANG Yiyun; XU Guosheng; SHAN Jiafang; LIU Fukun; ZHAO Yanping; GAO Xiang

Plasma Science and Technology > 2011 > 13(2): 153-156.

DING Bojiang, KONG Erhua, LI Miaohui, QIN Yongliang, ZHANG Lei, A. EKEDAHL, Y. PEYSSON, WANG Mao, XU Handong, HU Huaichuan, HUANG Yiyun, XU Guosheng, SHAN Jiafang, LIU Fukun, ZHAO Yanping, GAO Xiang. Recent Results of LHCD Experiments in EAST[J]. Plasma Science and Technology, 2011, 13(2): 153-156.

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Recent Results of LHCD Experiments in EAST

Funds: supported by National Natural Science Foundation of China (Nos. 10875149, 10928509), the National Magnetic Confinement Fusion Science Program of China (No. 2010GB105004), the Core University Program between Japan and China, and the Dean Foundation of Hefei Institute of Physical Science, Chinese Academy of Science.

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Abstract

Abstract

Lower hybrid wave (LHW)-plasma coupling and lower hybrid current drive (LHCD) experiments in divertor, including single-null and double-null, and limiter configurations were conducted systematically in EAST. A maximum power for launched LHW is 1.4 MW and the plasma current with LHCD is about 1 MA. It is indicated that the coupling is best in limiter configuration, then in single-null one, while worst in double-null one. Study in current drive efficiency by a least squares fit shows that there is no obvious difference in drive efficiency between the double-null and the single-null cases, whereas the efficiency is a slightly lower in the limiter case. The effect of plasma density on the current drive efficiency is due to the influence of density on impurity concentration.
- LHCD,
- LHW-plasma coupling,
- configuration

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