2D/3D electron temperature fluctuations near explosive MHD instabilities accompanied by minor and major disruptions
SCIE
SCOPUS
- Title
- 2D/3D electron temperature fluctuations near explosive MHD instabilities accompanied by minor and major disruptions
- Authors
- Choi, M. J.; Park, H. K.; Yun, G. S.; Lee, W.; Luhmann, N. C., Jr.; Lee, K. D.; Ko, W. -H.; Park, Y. -S.; Park, B. H.; In, Y.
- Date Issued
- 2016-06
- Publisher
- IOP PUBLISHING LTD
- Abstract
- Minor and major disruptions by explosive MHD instabilities were observed with the novel quasi 3D electron cyclotron emission imaging (ECEI) system in the KSTAR plasma. The fine electron temperature (T-e) fluctuation images revealed two types of minor disruptions: a small minor disruption is a q similar to 2 localized fast transport event due to a single m/n = 2/1 magnetic island growth, while a large minor disruption is partial collapse of the q <= 2 region with two successive fast heat transport events by the correlated m/n = 2/1 and m/n = 1/1 instabilities. The m/n = 2/1 magnetic island growth during the minor disruption is normally limited below the saturation width. However, as the additional interchange-like perturbation grows near the inner separatrix of the 2/1 island, the 2/1 island can expand beyond the limit through coupling with the cold bubble formed by the interchange-like perturbation.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/96296
- DOI
- 10.1088/0029-5515/56/6/066013
- ISSN
- 0029-5515
- Article Type
- Article
- Citation
- NUCLEAR FUSION, vol. 56, no. 6, page. 066013, 2016-06
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- There are no files associated with this item.
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