Abstract
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.
| Original language | English |
|---|---|
| Article number | 045004 |
| Pages (from-to) | 045004-1/4 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 107 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2011 |
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Yun, G. S., Lee, W., Choi, M. J., Lee, J., Park, H. K., Tobias, B. J., Domier, C. W., Luhmann, N. C., Donné, A. J. H., & Lee, J. H. (2011). Two-dimensional visualization of growth and burst of the edge-localized filaments in KSTAR H-mode plasmas. Physical Review Letters, 107(4), 045004-1/4. [045004]. https://doi.org/10.1103/PhysRevLett.107.045004