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Chin. Phys. B, 2017, Vol. 26(11): 115203    DOI: 10.1088/1674-1056/26/11/115203
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES Prev   Next  

Toroidal rotation induced by 4.6 GHz lower hybrid current drive on EAST tokamak

Xiang-Hui Yin(尹相辉)1,2, Jun Chen(陈俊)1,2, Rui-Ji Hu(胡睿佶)1,2, Ying-Ying Li(李颖颖)1, Fu-Di Wang(王福地)1, Jia Fu(符佳)1, Bo-Jiang Ding(丁伯江)1, Mao Wang(王茂)1, Fu-Kun Liu(刘甫坤)1, Qing Zang(臧庆)1, Yue-Jiang Shi(石跃江)1,3, Bo Lyu(吕波)1, Bao-Nian Wan(万宝年)1, EAST team1
1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
2. School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China;
3. Department of Nuclear Engineering, Seoul National University, Seoul 151-742, Korea
Abstract  

Using a tangentially viewing x-ray imaging crystal spectrometer, substantial co-current rotation driven by lower hybrid current drive (LHCD) at 4.6 GHz is observed on EAST tokamak. This study presents plasma rotation behaviors with 4.6 GHz LHCD injection. Typically, the 10-20 km/s co-current rotation change and the transport of rotation velocity from edge to core are observed. The relationship between plasma parameters and rotation is also investigated, indicating that rotation decreases with increasing internal inductance (li) and increases with increasing safety factor (q0). Hysteresis between rotation and Te plasma stored energy is observed, suggesting different response times between the electron heating and rotation acceleration by LHCD. A comparison between the rotations driven by 4.6 G LHCD and 2.45 G LHCD on EAST is also presented, in which higher frequency LHCD could induce more rotation changes.

Keywords:  intrinsic rotation      lower hybrid current drive (LHCD)     
Received:  09 February 2017      Published:  05 November 2017
PACS:  52.30.-q (Plasma dynamics and flow)  
  52.35.Hr (Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid))  
Fund: 

Project supported by the National Magnetic Confinement Fusion Science Program of China (Grant Nos. 2013GB112004 and 2015GB103002), the National Natural Science Foundation of China (Grant Nos. 11405212 and 11261140328), and the Major Program of Development Foundation of Hefei Center for Physical Science and Technology China (Grant No. 2016FXZY008).

Corresponding Authors:  Bo Lyu     E-mail:  blu@ipp.ac.cn

Cite this article: 

Xiang-Hui Yin(尹相辉), Jun Chen(陈俊), Rui-Ji Hu(胡睿佶), Ying-Ying Li(李颖颖), Fu-Di Wang(王福地), Jia Fu(符佳), Bo-Jiang Ding(丁伯江), Mao Wang(王茂), Fu-Kun Liu(刘甫坤), Qing Zang(臧庆), Yue-Jiang Shi(石跃江), Bo Lyu(吕波), Bao-Nian Wan(万宝年), EAST team Toroidal rotation induced by 4.6 GHz lower hybrid current drive on EAST tokamak 2017 Chin. Phys. B 26 115203

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