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Title: Line spectrum and ion temperature measurements from tungsten ions at low ionization stages in large helical device based on vacuum ultraviolet spectroscopy in wavelength range of 500–2200 Å

Vacuum ultraviolet spectra of emissions released from tungsten ions at lower ionization stages were measured in the Large Helical Device (LHD) in the wavelength range of 500–2200 Å using a 3 m normal incidence spectrometer. Tungsten ions were distributed in the LHD plasma by injecting a pellet consisting of a small piece of tungsten metal and polyethylene tube. Many lines having different wavelengths from intrinsic impurity ions were observed just after the tungsten pellet injection. Doppler broadening of a tungsten candidate line was successfully measured and the ion temperature was obtained.
Authors:
; ;  [1] ;  [2] ; ;  [3]
  1. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki 509-5292 (Japan)
  2. (Japan)
  3. Department of Fusion Science, Graduate University for Advanced Studies, 322-6, Oroshi-cho, Toki 509-5292 (Japan)
Publication Date:
OSTI Identifier:
22308946
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; DOPPLER BROADENING; ION TEMPERATURE; IONIZATION; LHD DEVICE; PELLET INJECTION; PLASMA; PLASMA IMPURITIES; POLYETHYLENES; TEMPERATURE MEASUREMENT; TUNGSTEN; TUNGSTEN IONS; ULTRAVIOLET SPECTRA; ULTRAVIOLET SPECTROMETERS; WAVELENGTHS