Development of multiwavelength-range fine-resolution spectrometer for hydrogen emissions and its application to large helical device periphery plasmas

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3356730· OSTI ID:22053938

Fujii, K; Mizushiri, K; Nishioka, T; Shikama, T; Hasuo, M ^[1]; Iwamae, A ^[2]; Goto, M; Morita, S ^[3]; Kado, S ^[4]; Sawada, K ^[5]

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1. Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 606-8501 (Japan)
2. Fusion Research and Development Directorate, Japan Atomic Energy Agency, Naka 311-0193 (Japan)
3. National Institute for Fusion Science, Toki 509-5292 (Japan)
4. Department of Nuclear Engineering and Management, School of Engineering, University of Tokyo, Tokyo 113-8656 (Japan)
5. Department of Applied Physics, Faculty of Engineering, Shinshu University, Nagano 380-8553 (Japan)

We developed a spectrometer specialized for simultaneous observation of the hydrogen Balmer-{alpha}, -{beta}, -{gamma} lines and the Fulcher-{alpha} v'=v''=2 rovibronic transition band. The spectrometer was optimized for the light input coupled by nine optical fibers having 400 {mu}m core diameters. The spectral resolutions were 0.02-0.03 nm for these wavelength ranges at the entrance slit width of 20 {mu}m. The polarization resolved spectra of these emissions from the peripheral region of large helical device (LHD) plasmas were measured simultaneously and showed the polarization dependence coming from the magnetic field in the LHD plasma.

• OSTI ID: 22053938
• Journal Information: Review of Scientific Instruments, Vol. 81, Issue 3; Other Information: (c) 2010 American Institute of Physics; 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
EMISSION
HYDROGEN
LHD DEVICE
MAGNETIC FIELDS
OPTICAL FIBERS
PLASMA
POLARIZATION
RESOLUTION
SPECTRA
SPECTROMETERS
WAVELENGTHS