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

Study of Type III ELMs in the KSTAR Tokamak

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


Dr JaeChun Seol (National Fusion Research Institute)


In this paper, we report the characteristics of Type III ELM in KSTAR mostly focusing on the Type III ELM regime after L-H transition. In the KSTAR tokamak, Type III ELMs are frequently observed after the transition from L-mode to H-mode. The repetition frequency of the Type III ELMs is 200~1000 Hz. As the edge plasma pressure increases, ELM-free regime occurs, which is followed by Type I ELM regime. Type III ELM regime at the L-H transition occurs regardless of the input powers. A magnetic precursor oscillation observed before the Type III ELM crash in the low field side midplane while ELM bursts are observed in all toroidal and poloidal Mirnov coils. In this study, we perform the MHD stability analysis of the plasma edge with considering the density perturbation.
Paper Number EX/P8-7
Country or International Organisation Korea, Republic of

Primary author

Dr JaeChun Seol (National Fusion Research Institute)


Dr Ahmet Aydemir (The University of Texas at Austin, Institute for Fusion Studies) Dr Byung-Ho Park (National Fusion Research Institute) Dr Hyungho LEE (National Fusion Research Institute) Dr Jayhyun Kim (National Fusion Research Institute) Dr Jong-Gu Kwak (National Fusion Research Institute) Dr Sang Gon Lee (National Fusion Research Institute) Dr Yong-Un Nam (National Fusion Research Institute) Dr Young-chul Ghim (National Fusion Research Institue)

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