Validation of plasma shape reconstruction by Cauchy condition surface method in KSTAR

Journal Article · Sat Mar 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4867493· OSTI ID:22251988

Miyata, Y.; Suzuki, T.; Ide, S. ^[1]; Hahn, S. H.; Chung, J.; Bak, J. G.; Ko, W. H. ^[2]

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1. Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 (Japan)
2. National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of)

Cauchy Condition Surface (CCS) method is a numerical approach to reconstruct the plasma boundary and calculate the quantities related to plasma shape using the magnetic diagnostics in real time. It has been applied to the KSTAR plasma in order to establish the plasma shape reconstruction with the high elongation of plasma shape and the large effect of eddy currents flowing in the tokamak structures for the first time. For applying the CCS calculation to the KSTAR plasma, the effects by the eddy currents and the ferromagnetic materials on the plasma shape reconstruction are studied. The CCS calculation includes the effect of eddy currents and excludes the magnetic diagnostics, which is expected to be influenced largely by ferromagnetic materials. Calculations have been performed to validate the plasma shape reconstruction in 2012 KSTAR experimental campaign. Comparison between the CCS calculation and non-magnetic measurements revealed that the CCS calculation can reconstruct the accurate plasma shape even with a small I{sub P}.

• OSTI ID: 22251988
• Journal Information: Physics of Plasmas, Vol. 21, Issue 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
EDDY CURRENTS
FERROMAGNETIC MATERIALS
PLASMA
SHAPE
SURFACES
TOKAMAK DEVICES
VALIDATION