Edge profile measurements using Thomson scattering on the KSTAR tokamak

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4890258· OSTI ID:22303828

Ko, W. H. ^[1]; Oh, S.; Lee, W. R.; Kim, K. P.; Lee, K. D.; Jeon, Y. M.; Yoon, S. W.; Cho, K. W. ^[1]; Narihara, K.; Yamada, I.; Yasuhara, R. ^[2]; Hatae, T.; Yatsuka, E.; Ono, T. ^[3]; Hong, J. H. ^[4]

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1. National Fusion Research Institute, Daejeon (Korea, Republic of)
2. National Institute for Fusion Science, Nagoya (Japan)
3. Japan Atomic Energy Agency, Naka (Japan)
4. Department of Physics, KAIST (Korea, Republic of)

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.

• OSTI ID: 22303828
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

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