Quasi 3D ECE imaging system for study of MHD instabilities in KSTARa

A second electron cyclotron emission imaging (ECEI) system has been installed on the KSTAR tokamak, toroidally separated by 1/16th of the torus from the first ECEI system. For the first time, the dynamical evolutions of MHD instabilities from the plasma core to the edge have been visualized in quasi...

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Bibliographic Details
Published in:Review of scientific instruments 2014-11, Vol.85 (11)
Main Authors: Yun, G S, Lee, W, Choi, M J, Lee, J, Kim, M, Leem, J, Nam, Y, Choe, G H, Park, H K, Park, H, Woo, D S, Kim, K W, Domier, C W, Luhmann, N C, Ito, N, Mase, A, Lee, S G
Format: Article
Language:English
Subjects:
Cyclotrons
Diagnostic systems
Emission analysis
Imaging
Magnetohydrodynamics
Scientific apparatus & instruments
Tokamak devices
Toruses
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Summary:A second electron cyclotron emission imaging (ECEI) system has been installed on the KSTAR tokamak, toroidally separated by 1/16th of the torus from the first ECEI system. For the first time, the dynamical evolutions of MHD instabilities from the plasma core to the edge have been visualized in quasi-3D for a wide range of the KSTAR operation (B0 = 1.7∼3.5 T). This flexible diagnostic capability has been realized by substantial improvements in large-aperture quasi-optical microwave components including the development of broad-band polarization rotators for imaging of the fundamental ordinary ECE as well as the usual 2nd harmonic extraordinary ECE.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4890401