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Author Liu, Y. ♦ Zhang, H. M. ♦ Morita, S. ♦ Oishi, T. ♦ Goto, M. ♦ Huang, X. L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ♦ PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ ASYMMETRY ♦ AVAILABILITY ♦ DIAGNOSTIC TECHNIQUES ♦ DISTRIBUTION ♦ EMISSION ♦ EMISSIVITY ♦ EXTREME ULTRAVIOLET RADIATION ♦ IMPURITIES ♦ LHD DEVICE ♦ PLASMA ♦ SPACE ♦ SPECTRA ♦ SYMMETRY ♦ TUNGSTEN ♦ ULTRAVIOLET SPECTROMETERS ♦ WAVELENGTHS
Abstract Two space-resolved extreme ultraviolet spectrometers working in wavelength ranges of 10-130 Å and 30-500 Å have been utilized to observe the full vertical profile of tungsten line emissions by simultaneously measuring upper- and lower-half plasmas of LHD, respectively. The radial profile of local emissivity is reconstructed from the measured vertical profile in the overlapped wavelength range of 30-130 Å and the up-down asymmetry is examined against the local emissivity profiles of WXXVIII in the unresolved transition array spectrum. The result shows a nearly symmetric profile, suggesting a good availability in the present diagnostic method for the impurity asymmetry study.
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-11-15
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 87
Issue Number 11


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