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Jeon, Y M; Park, J-K; Yoon, S W; Ko, W H; Lee, S G; Lee, K D; Yun, G S; Nam, Y U; Kim, W C; Kwak, Jong-Gu; Lee, K S; Kim, H K; Yang, H L
Physical review letters, 07/2012, Volume: 109, Issue: 3Journal Article
Edge localized modes (ELMs) in high-confinement mode plasmas were completely suppressed in KSTAR by applying n=1 nonaxisymmetric magnetic perturbations. Initially, the ELMs were intensified with a reduction of frequency, but completely suppressed later. The electron density had an initial 10% decrease followed by a gradual increase as ELMs were suppressed. Interesting phenomena such as a saturated evolution of edge T(e) and broadband changes of magnetic fluctuations were observed, suggesting the change of edge transport by the applied magnetic perturbations.
