Two-dimensional visualization of growth and burst of the edge-localized filaments in KSTAR H-mode plasmas

G.S. Yun; Woochang Lee; M.J. Choi; J. Lee; H.K. Park; B.J. Tobias; C.W. Domier; N.C. Luhmann; A.J.H. Donné; J.H. Lee

doi:10.1103/PhysRevLett.107.045004

Two-dimensional visualization of growth and burst of the edge-localized filaments in KSTAR H-mode plasmas

G.S. Yun, Woochang Lee, M.J. Choi, J. Lee, H.K. Park, B.J. Tobias, C.W. Domier, N.C. Luhmann, A.J.H. Donné, J.H. Lee

Science and Technology of Nuclear Fusion

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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	https://doi.org/10.1103/PhysRevLett.107.045004
Publication status	Published - 2011

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title = "Two-dimensional visualization of growth and burst of the edge-localized filaments in KSTAR H-mode plasmas",

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.",

author = "G.S. Yun and Woochang Lee and M.J. Choi and J. Lee and H.K. Park and B.J. Tobias and C.W. Domier and N.C. Luhmann and A.J.H. Donn{\'e} and J.H. Lee",

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doi = "10.1103/PhysRevLett.107.045004",

language = "English",

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T1 - Two-dimensional visualization of growth and burst of the edge-localized filaments in KSTAR H-mode plasmas

AU - Yun, G.S.

AU - Lee, Woochang

AU - Choi, M.J.

AU - Lee, J.

AU - Park, H.K.

AU - Tobias, B.J.

AU - Domier, C.W.

AU - Luhmann, N.C.

AU - Donné, A.J.H.

AU - Lee, J.H.

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.107.045004

DO - 10.1103/PhysRevLett.107.045004

M3 - Article

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VL - 107

SP - 045004-1/4

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 4

M1 - 045004

ER -

Two-dimensional visualization of growth and burst of the edge-localized filaments in KSTAR H-mode plasmas

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