Speaker
Dr
Sang Gon Lee
(National Fusion Research Institute)
Description
An investigation of toroidal rotation and momentum transport was carried out at KSTAR. The impurity toroidal rotation has been observed in the core region from the Doppler shift of helium-like argon x-ray line with various plasma discharges including a pure ohmic heating and neutral beam injection (NBI). In the ohmic plasmas, the direction and magnitude of the core rotation strongly depends on the initial plasma conditions during the plasma current ramp-up phase, and the measured ion thermal Mach number is proportional to the normalized plasma pressure. In the NBI heated plasmas, the core toroidal rotation is proportional to the ion temperature up to ~ 2.5 keV, and then it is saturated to ~ 250 km/sec with the ion temperature up to 4 keV. This observation is under consideration with the NUBEAM simulations focusing on the effects of the beam energy and momentum transport. This paper will describe the experimental results of the toroidal rotation and momentum transport studies in the KSTAR device.
| Country or International Organisation | Korea, Republic of |
|---|---|
| Paper Number | EX/P8-14 |
Primary author
Dr
Sang Gon Lee
(National Fusion Research Institute)
Co-authors
Dr
Hyungho Lee
(National Fusion Research Institute)
Dr
JaeChun Seol
(National Fusion Research Institute)
Ms
Jeong Won Yoo
(University of Science & Technology)
Dr
Kenneth Hill
(Princeton Plasma Physics Laboratory)
Dr
Laurent Terzolo
(National Fusion Research Institute)
Dr
Manfred Bitter
(Princeton Plasma Physics Laboratory)
Mr
Yong Seon Kim
(National Fusion Research Institute)
