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Title: Edge profile measurements using Thomson scattering on the KSTAR tokamak

In the KSTAR Tokamak, a “Tangential Thomson Scattering” (TTS) diagnostic system has been designed and installed to measure electron density and temperature profiles. In the edge system, TTS has 12 optical fiber bundles to measure the edge profiles with 10–15 mm spatial resolution. These 12 optical fibers and their spatial resolution are not enough to measure the pedestal width with a high accuracy but allow observations of L-H transition or H-L transitions at the edge. For these measurements, the prototype ITER edge Thomson Nd:YAG laser system manufactured by JAEA in Japan is installed. In this paper, the KSTAR TTS system is briefly described and some TTS edge profiles are presented and compared against the KSTAR Charge Exchange Spectroscopy and other diagnostics. The future upgrade plan of the system is also discussed in this paper.
Authors:
;  [1] ;  [2] ; ; ; ; ; ; ;  [1] ; ; ;  [3] ; ; ;  [4] ;  [5]
  1. National Fusion Research Institute, Daejeon (Korea, Republic of)
  2. (UST), Daejeon (Korea, Republic of)
  3. National Institute for Fusion Science, Nagoya (Japan)
  4. Japan Atomic Energy Agency, Naka (Japan)
  5. Department of Physics, KAIST (Korea, Republic of)
Publication Date:
OSTI Identifier:
22303828
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:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCURACY; CHARGE EXCHANGE; ELECTRON DENSITY; ELECTRON TEMPERATURE; ITER TOKAMAK; NEODYMIUM LASERS; SPATIAL RESOLUTION; SPECTROSCOPY; THOMSON SCATTERING