Speaker
Mr
Junghee Kim
(Republic of Korea)
Description
It has been found that toroidally rotating plasmas exhibit beneficial effects such as suppression or reformation of magnetohydrodynamic (MHD) instabilities. In KSTAR plasmas, it is found that sawtooth period lengthens significantly as the toroidal rotation speed increases. Stability analysis reveals the critical rotation speed to reach the marginal stability, suppressing the growth of the ideal internal kink instability. This means sufficiently fast toroidal rotation gives a complete stabilization of n=1 internal kink mode as well as suppression of the sawtooth with the condition of q_0 below than unity.
Country or International Organization of Primary Author
Korea
Primary author
Mr
Junghee Kim
(Republic of Korea)
Co-authors
Dr
H. S. Han
(National Fusion Research Institute (NFRI))
Ms
J. W. Yoo
(University of Science and Technology (UST))
Dr
K. I. You
(National Fusion Research Institute (NFRI))
Dr
S. W. Yoon
(National Fusion Research Institute (NFRI))
Dr
Sang Gon Lee
(National Fusion Research Institute)
