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Title: Quasi 3D ECE imaging system for study of MHD instabilities in KSTAR

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 (B{sub 0} = 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.
Authors:
; ; ; ; ; ;  [1] ; ;  [2] ; ; ;  [3] ; ;  [4] ;  [5] ;  [6] ;  [7]
  1. Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of)
  2. Ulsan National Institute of Science and Technology, Ulsan 689-798 (Korea, Republic of)
  3. School of Electrical Engineering, Kyungpook National University, Daegu 702-701 (Korea, Republic of)
  4. Department of Electrical and Computer Engineering, University of California, Davis, California 95616 (United States)
  5. KASTEC, Kyushu University, Kasuga-shi, Fukuoka 812-8581 (Japan)
  6. Ube National College of Technology, Ube-shi, Yamaguchi 755-8555 (Japan)
  7. National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22308926
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ELECTRON CYCLOTRON-RESONANCE; ELECTRON EMISSION; IMAGES; MAGNETOHYDRODYNAMICS; MICROWAVE RADIATION; PLASMA INSTABILITY; POLARIZATION; TOKAMAK DEVICES