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

Measurement of Apparent Poloidal Rotation of Ion-Scale Turbulence with the KSTAR Microwave Imaging Reflectometer

Oct 17, 2014, 2:00 PM
4h 45m
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 8

Speaker

Dr Woochang Lee (POSTECH)

Description

Mean apparent poloidal rotations of ion-scale density fluctuations in the laboratory frame were observed with the microwave imaging reflectometer (MIR) system in KSTAR ohmic and neutral beam (NB) heated L-mode plasmas. The estimated apparent poloidal velocities are 1-2 km/s at r/a ~ 0.5 in the electron diamagnetic direction for ohmic plasmas, and 8-10 km/s at r/a ~ 0.6 and 5-6 km/s at r/a ~ 0.7 in the ion diamagnetic direction for NB heated L-mode plasmas. For NB heated L-mode plasmas, the apparent poloidal velocities often deviate from the poloidally projected toroidal velocities of carbon ions and the difference is 2-3 km/s. Possible sources of the measured difference are under investigation including difference in toroidal velocity between the carbon and main deuterium ions.
Country or International Organisation Korea, Republic of
Paper Number EX/P8-13

Primary author

Dr Woochang Lee (POSTECH)

Co-authors

Dr Calvin W. Domier (UC Davis) Prof. Gunsu Yun (POSTECH) Prof. Hyeon K. Park (UNIST) Dr J. H. Jeong (NFRI) Mr June-Eok Leem (POSTECH) Prof. Neville C. Luhmann (UC Davis) Dr Won Ha Ko (Korea, Republic of) Dr Yong Un Nam (NFRI) Dr Young Soon Bae (NFRI) Dr Young-Seok Park (Columbia University) Prof. Young-chul Ghim (KAIST)

Presentation materials