Line Spectrum of Tungsten Ions at Low Ionization Stages in Large Helical Device in Wavelength Range of 300 - 2400 Å Measured Using 20 cm Normal Incidence VUV Spectrometers

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  • OISHI Tetsutarou
    National Institute for Fusion Science Department of Fusion Science, Graduate University for Advanced Studies
  • MORITA Shigeru
    National Institute for Fusion Science Department of Fusion Science, Graduate University for Advanced Studies
  • HUANG Xianli
    Department of Fusion Science, Graduate University for Advanced Studies
  • ZHANG Hongming
    Department of Fusion Science, Graduate University for Advanced Studies
  • GOTO Motoshi
    National Institute for Fusion Science Department of Fusion Science, Graduate University for Advanced Studies
  • the LHD Experiment Group
    National Institute for Fusion Science

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抄録

<p>Vacuum ultraviolet (VUV) spectra of emissions released from tungsten ions at lower ionization stages were measured in the Large Helical Device (LHD) using three 20 cm normal incidence spectrometers in the wavelength range of 300 to 2400 Å. Tungsten ions were introduced in the LHD plasma by injecting a pellet consisting of a small piece of tungsten metal and polyethylene tube. The VUV spectroscopy revealed that WVI 639.683 Å, 677.722 Å, and 639.683 × 2 Å lines were useful lines for monitoring tungsten ion behaviors because they had large intensities and were isolated from other intrinsic impurity lines.</p>

収録刊行物

  • Plasma and Fusion Research

    Plasma and Fusion Research 10 (0), 3402031-3402031, 2015

    一般社団法人 プラズマ・核融合学会

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