Two-Dimensional Visualization of Growth and Burst of the Edge-Localized Filaments in KSTAR H-Mode Plasmas

TitleTwo-Dimensional Visualization of Growth and Burst of the Edge-Localized Filaments in KSTAR H-Mode Plasmas
Publication TypeJournal Article
Year of Publication2011
AuthorsG.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
JournalPhysical Review Letters
Volume107
Issue4
Pagination045004
Date PublishedJul
Type of ArticleArticle
ISBN Number0031-9007
KeywordsDYNAMICS, ELMs, PEDESTAL, TOKAMAKS, TRANSPORT
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.

DOI10.1103/PhysRevLett.107.045004
Division

FP

Department

TP

PID

0428aa45a7c64f4ad56518648d3a2003

Alternate TitlePhys. Rev. Lett.

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