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박현거

Park, Hyeon Keo
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Toroidal mode number transition of the edge localized modes in the KSTAR plasmas

Author(s)
Lee, J.E.Yun, GunsuKim, M.Lee, JisanLee, WoochangPark, Hyeon KeoDomier, Calvin W.Luhmann, Neville C.Ko, W.H.
Issued Date
2015-11
DOI
10.1088/0029-5515/55/11/113035
URI
https://scholarworks.unist.ac.kr/handle/201301/17870
Fulltext
http://iopscience.iop.org/article/10.1088/0029-5515/55/11/113035/meta
Citation
NUCLEAR FUSION, v.55, no.11, pp.113035
Abstract
Rapid transitions of the toroidal mode number (n) have been often detected during the evolution of the edge localized modes (ELMs) in the inter-ELM-crash periods of the KSTAR tokamak plasmas. The mode number transitions accompany changes of the mode frequency (f(mode)) (e.g. n changed from 8 to 5 while f(mode) changed from similar to 32 to 9 kHz). The observed transition phenomena have been diverse including small and large increase (or decrease) in the mode number and multiple transitions during a single inter-ELM-crash period. Two classes of the mode transitions were identified: non-overlapping transition and overlapping transition. The former case is characterized by the absence of coherent filamentary structure during the transition and the latter case is characterized by co-existence of two coherent filamentary structures with different mode numbers. Each transition process typically lasts a few hundreds to thousands of mu s.
Publisher
INT ATOMIC ENERGY AGENCY
ISSN
0029-5515
Keyword (Author)
ECEIELMsKSTARnonlinear interactiontoroidal mode number
Keyword
ELMSJET

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