Open AccessDevelopment of multiwavelength-range fine-resolution spectrometer for hydrogen emissions and its application to large helical device periphery plasmas
Author(s) -
Keisuke Fujii,
K. Mizushiri,
T. Nishioka,
T. Shikama,
A. Iwamae,
M. Goto,
S. Morita,
S. Kado,
K. Sawada,
Masahiro Hasuo
Publication year - 2010
Publication title -
review of scientific instruments
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.605
H-Index - 165
eISSN - 1089-7623
pISSN - 0034-6748
DOI - 10.1063/1.3356730
Subject(s) - spectrometer , plasma , range (aeronautics) , large helical device , materials science , hydrogen , resolution (logic) , plasma diagnostics , atomic physics , optics , environmental science , physics , nuclear physics , computer science , artificial intelligence , composite material , quantum mechanics
We developed a spectrometer specialized for simultaneous observation of the hydrogen Balmer-α, -β, -γ lines and the Fulcher-α v' = v" = 2 rovibronic transition band. The spectrometer was optimized for the light input coupled by nine optical fibers having 400 μm core diameters. The spectral resolutions were 0.02–0.03 nm for these wavelength ranges at the entrance slit width of 20 μm. 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
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