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

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

DOI:https://doi.org/10.1063/1.4885470· OSTI ID:22308946

Morita, S.; Goto, M. ^[1]; Huang, X. L.; Zhang, H. M. ^[2]

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1. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki 509-5292 (Japan)
2. Department of Fusion Science, Graduate University for Advanced Studies, 322-6, Oroshi-cho, Toki 509-5292 (Japan)

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.

• OSTI ID: 22308946
• 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

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