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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Core Plasma Rotation Characteristics of RF-Heated H-Mode Discharges on EAST

Oct 15, 2014, 8:30 AM
4h
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 3

Speaker

Dr Bo Lyu (Institute of Plasma Physics, Chinese Academy of Sciences)

Description

Access to high-confinement plasmas on the EAST tokamak was readily achieved through LHCD, ICRF, or their combined application along with improved wall conditioning and wave-plasma coupling capabilities. Using a tangentially viewing X-ray crystal spectrometer, core plasma rotation profiles and their temporal evolutions were obtained. This paper presented typical plasma rotation behaviors for non-stationary and stationary H-mode discharges generated with concurrent LHCD and ICRF heating. A substantial increase of the co-current core rotation was observed at L-H transitions. For unsteady discharges with multiple L-H and H-L transitions, central rotation velocity varied as the plasma entered and left the H-mode phase. For stationary ELMy H-mode discharges, the rotation increases at an L-H transition and core plasma rotation profile remains very stable during the entire H-mode phase, although the occurrence of ELMs tended to slow down the core rotation. Changes of the steady-state core rotation at L-H transitions were found to be dependent on the plasma parameters for different ELM types. A linear relation between the rotation and stored energy, similar to the Rice scaling was obtained for both ELM-free and ELMy H-mode discharges; and for ELMy-free discharges the slope was by a factor of 1.75 steeper. This work was supported by National Magnetic Confinement Fusion Science Program of China (No. 2011GB101004, 2011GB107001 and 2013BG112004), National Science Foundation of China (No. 11175208, 11305212 and 11375235) and JSPS-NRF-NSFC A3 Foresight Program in the field of Plasma Physics (No. 11261140328).
Country or International Organisation China
Paper Number EX/P3-5

Primary author

Dr Bo Lyu (Institute of Plasma Physics, Chinese Academy of Sciences)

Co-authors

Dr Baonian Wan (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Fudi Wang (Institute of Plasma Physics, Chinese Academy of Sciences) Mr Hongming Zhang (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Jia Fu (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Kenneth Hill (Princeton Plasma Physics Laboratory) Dr Manfred Bitter (Princeton Plasma Physics Laboratory) Mr Mao Wang (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Sang Gon Lee (National Fusion Research Institute) Dr Xinjun Zhang (Institute of Plasma Physics Chinese Academy of Sciences (ASIPP)) Mr Yanwei Xiong (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Yingying Li (Institute of Plasma Physics, Chinese Academy of Sciences) Mr Yongcai Shen (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Yuejiang SHI (National Fusion Research Institute)

Presentation materials