Observation of Central Toroidal Rotation Induced by ICRF on EAST

Core plasma rotation of both L-mode and H-mode discharges with ion cyclotron range of frequency（ICRF） minority heating（MH） scheme was measured with a tangential X-ray imaging crystal spectrometer on EAST（Experimental Advanced Superconducting Tokamak）.Cocurrent central impurity toroidal rotation chan...

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Published inPlasma science & technology Vol. 18; no. 2; pp. 114 - 119
Main Author 潘夏云 王福地 张新军 吕波 陈俊 李颖颖 符佳 石跃江 余羿 叶民友 万宝年
Format Journal Article
LanguageEnglish
Published 01.02.2016
Subjects
Crystals
Cyclotron frequency
Heating
H模式等离子体
ICRF加热
Ion cyclotron radiation
Magnetic fields
Plasma currents
Superconductivity
Tokamak devices
中央
环形磁场
等离子体参数
等离子体旋转
等离子体电流
超导托卡马克装置
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Summary:Core plasma rotation of both L-mode and H-mode discharges with ion cyclotron range of frequency（ICRF） minority heating（MH） scheme was measured with a tangential X-ray imaging crystal spectrometer on EAST（Experimental Advanced Superconducting Tokamak）.Cocurrent central impurity toroidal rotation change was observed in ICRF-heated L-and H-mode plasmas.Rotation increment as high as 30 km/s was generated at ~1.7 MW ICRF power.Scaling results showed similar trend as the Rice scaling but with significant scattering,especially in L-mode plasmas.We varied the plasma current,toroidal field and magnetic configuration individually to study their effect on L-mode plasma rotation,while keeping the other major plasma parameters and heating unchanged during the scanning.It was found that larger plasma current could induce plasma rotation more efficiently.A scan of the toroidal magnetic field indicated that the largest rotation was obtained for on-axis ICRF heating.A comparison between lower-single-null（LSN）and double-null（DN） configurations showed that LSN discharges rendered a larger rotation change for the same power input and plasma parameters.
Bibliography:Core plasma rotation of both L-mode and H-mode discharges with ion cyclotron range of frequency（ICRF） minority heating（MH） scheme was measured with a tangential X-ray imaging crystal spectrometer on EAST（Experimental Advanced Superconducting Tokamak）.Cocurrent central impurity toroidal rotation change was observed in ICRF-heated L-and H-mode plasmas.Rotation increment as high as 30 km/s was generated at ~1.7 MW ICRF power.Scaling results showed similar trend as the Rice scaling but with significant scattering,especially in L-mode plasmas.We varied the plasma current,toroidal field and magnetic configuration individually to study their effect on L-mode plasma rotation,while keeping the other major plasma parameters and heating unchanged during the scanning.It was found that larger plasma current could induce plasma rotation more efficiently.A scan of the toroidal magnetic field indicated that the largest rotation was obtained for on-axis ICRF heating.A comparison between lower-single-null（LSN）and double-null（DN） configurations showed that LSN discharges rendered a larger rotation change for the same power input and plasma parameters.
PAN Xiayun, WANG Eudi, ZHANG Xinjun , LYU Bo ,CHEN Jun ,LI Yingying,FU Jia , SHI Yuejiang, YU Yi, YE Minyou , WAN Baonian （ 1School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China 2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China aHefei Science Center, Chinese Academy of Sciences, Hefei 230031, China 4Department of Nuclear Engineering, Seoul National University, Seoul 151-742, Korea）
central toroidal rotation ICRF flow drive minority heating X-ray imaging crystal spectrometer
34-1187/TL
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1009-0630
DOI:10.1088/1009-0630/18/2/03