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Resolving the uncertainties of non-axisymmetric fields in tokamaks

Author(s)
In, YongkyoonSeol, JKo, WHLee, SGYoon, SWLee, HHJeon, YMKim, JBak, JGPark, HPark, JKYun, GS
Issued Date
2015-11-18
URI
https://scholarworks.unist.ac.kr/handle/201301/34854
Fulltext
http://meetings.aps.org/Meeting/DPP15/Session/PO6.9
Citation
57th Annual Meeting of the APS Division of Plasma Physics
Abstract
Recent study suggests that KSTAR could be a benefactor of the extremely low level of intrinsic error field in n=1 resonant magnetic perturbation (RMP) driven edge localized modes (ELM) control [1]. Specifically, when the n=1 RMP currents increases in order to suppress/mitigate ELMs, a kink-resonant mode-locking is not usually invoked in KSTAR, unlike in other devices [2]. Besides we have discovered that the mid-plane RMP appeared much more effective than the off-midplane RMPs in affecting the ELMs with strong density pump-outs and enhanced ELM frequency. Presently, the enhanced understanding of non-axisymmetric field in tokamaks has been in great need, in particular, for the ITER RMP requirements [3]. As the prevailing design of in-vessel RMP coils in ITER is similar to that in KSTAR, we are keen to resolve the uncertainties of the non-axisymmetric fields on transport and stability, and their limits, contributing directly to ITER and beyond.
Publisher
American Physical Society

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