|Title||Two-Dimensional Visualization of Growth and Burst of the Edge-Localized Filaments in KSTAR H-Mode Plasmas|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||G.S Yun, W. Lee, M.J Choi, J. Lee, H.K Park, B. Tobias, C.W. Domier, NC Luhmann, Jr., A.JH Donne, J.H Lee|
|Journal||Physical Review Letters|
|Type of Article||Article|
|Keywords||DYNAMICS, ELMs, PEDESTAL, TOKAMAKS, TRANSPORT|
The filamentary nature and dynamics of edge-localized modes (ELMs) in the KSTAR high-confinement mode plasmas have been visualized in 2D via electron cyclotron emission imaging. The ELM filaments rotating with a net poloidal velocity are observed to evolve in three distinctive stages: initial linear growth, interim quasisteady state, and final crash. The crash is initiated by a narrow fingerlike perturbation growing radially from a poloidally elongated filament. The filament bursts through this finger, leading to fast and collective heat convection from the edge region into the scrape-off layer, i.e., ELM crash.
|Alternate Title||Phys. Rev. Lett.|
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