ELM control experiments in the KSTAR device
SCIE
SCOPUS
- Title
- ELM control experiments in the KSTAR device
- Authors
- Kim, J; Jeon, YM; Xiao, WW; Yoon, SW; Park, JK; Yun, GS; Ahn, JW; Kim, HS; Yang, HL; Kim, HK; Park, S; Jeong, JH; Jung, M; Choe, GH; Ko, WH; Lee, SG; Nam, YU; Bak, JG; Lee, KD; Na, HK; Hahn, SH; Diamond, PH; Rhee, T; Kwon, JM; Sabbagh, SA; Park, YS; Park, HK; Na, YS; Kim, WC; Kwak, JG
- Date Issued
- 2012-11
- Publisher
- IOP PUBLISHING LTD,
- Abstract
- The fourth KSTAR campaign in 2011 concentrated on active edge-localized mode (ELM) control by various methods such as non-axisymmetric magnetic perturbations, supersonic molecular beam injection (SMBI), vertical jogs of the plasma column and edge electron heating. The segmented in-vessel control coil (IVCC) system is capable of applying n <= 2 perturbed field with different phasing among top, middle and bottom coils. Application of an n = 1 perturbed field showed a desirable ELM suppression result. Fast vertical jogs of the plasma column achieved ELM pace-making and ELMs locked to 50 Hz vertical jogs were observed with a high probability of phase locking. A newly installed SMBI system was used for ELM control and the state of mitigated ELMs was sustained by the optimized repetitive SMBI pulse for a few tens of ELM periods. A change in ELM behaviour was seen due to edge electron heating although the effect of ECH launch needs supplementary analyses. The ECEI images of suppressed/mitigated ELM states showed apparent differences when compared with natural ELMy states. Further analyses are ongoing to explain the observed ELM control results.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15617
- DOI
- 10.1088/0029-5515/52/11/114011
- ISSN
- 0029-5515
- Article Type
- Article
- Citation
- NUCLEAR FUSION, vol. 52, no. 11, page. 114011 - 114011, 2012-11
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- There are no files associated with this item.
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