Long Pulse H-Mode Scenarios Sustained by RF Heating on EAST

Abstract EAST has demonstrated its capability of long pulse operation using RF heating （LHCD and ICRF） in past experiments. One key issue to realize the long pulse H-mode expert- meats is to sustain the plasma current for steady state operation. Based on the calculations of the transport code ONETWO...

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Published inPlasma science & technology Vol. 17; no. 6; pp. 448 - 453
Main Author 高翔 李国强 张涛 杨曜 龚先祖 刘子奚 任启龙 刘海庆 曾龙 余耀伟 刘少承 刘晓菊 张寿彪 蔡辉山 吴雪梅 李建刚
Format Journal Article
LanguageEnglish
Published 01.06.2015
Subjects
Cyclotron frequency
EAST
Heating
H模式等离子体
ICRF
Ion cyclotron radiation
Joining
LHCD
Mathematical analysis
Plasma currents
Steady state
Transport
低杂波电流驱动
射频加热
等离子体电流
长脉冲
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ISSN1009-0630
DOI10.1088/1009-0630/17/6/02

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Summary:Abstract EAST has demonstrated its capability of long pulse operation using RF heating （LHCD and ICRF） in past experiments. One key issue to realize the long pulse H-mode expert- meats is to sustain the plasma current for steady state operation. Based on the calculations of the transport code ONETWO and its coupled RF code GENRAY, two scenarios have been proposed to achieve the 10 s H-mode plasma with Ip=400 kA, 〈 ne 〉=4.5×1019 m-a, βN=2, and the 100 s H-mode plasma with Ip=280 kA, 〈 ne 〉=3.5×1019 m-a, βN=1.8 recently. The current drive of lower hybrid wave is an important issue in the two scenarios. An experimental result on lower hybrid current drive in H-mode plasmas on EAST is also presented.
Bibliography:GAO Xiang , LI Guoqiang , ZHANG Tao , YANG Yao , GONG Xianzu, LIU Zixi , REN Qilong , LIU Haiqing , ZENG Long , YU Yaowei , LIU Shaocheng , LIU Xiaoju , ZHANG Shoubiao, CAI Huishan, WU Xuemei , LI Jiangang , and the EAST team （Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China 2Department of Modern Physics, School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China 3Department of Physics, Soochow University, Soochow 215006, China）
long pulse H-mode； RF heating； ONETWO
34-1187/TL
Abstract EAST has demonstrated its capability of long pulse operation using RF heating （LHCD and ICRF） in past experiments. One key issue to realize the long pulse H-mode expert- meats is to sustain the plasma current for steady state operation. Based on the calculations of the transport code ONETWO and its coupled RF code GENRAY, two scenarios have been proposed to achieve the 10 s H-mode plasma with Ip=400 kA, 〈 ne 〉=4.5×1019 m-a, βN=2, and the 100 s H-mode plasma with Ip=280 kA, 〈 ne 〉=3.5×1019 m-a, βN=1.8 recently. The current drive of lower hybrid wave is an important issue in the two scenarios. An experimental result on lower hybrid current drive in H-mode plasmas on EAST is also presented.
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ISSN:1009-0630
DOI:10.1088/1009-0630/17/6/02