Observation of Central Toroidal Rotation Induced by ICRF on EAST

• Published in: Plasma 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
• Language: English
• 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
• ISSN: 1009-0630
• DOI: 10.1088/1009-0630/18/2/03

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.