Visible spectroscopy in the DIII–D divertor

Spectroscopy measurements in the DIII–D divertor have been carried out with a survey spectrometer that provides simultaneous registration of the visible spectrum over the region 400–900 nm with a resolution of 0.25 nm. Broad spectral coverage is achieved through the use of a fiberoptic transformer a...

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Bibliographic Details
Published in:Review of Scientific Instruments 1997-01, Vol.68 (1), p.978-981
Main Authors: Brooks, N. H., Fehling, D., Hillis, D. L., Klepper, C. C., Naumenko, N. N., Tugarinov, S. N., Whyte, D. G.
Format: Article
Language:English
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Summary:Spectroscopy measurements in the DIII–D divertor have been carried out with a survey spectrometer that provides simultaneous registration of the visible spectrum over the region 400–900 nm with a resolution of 0.25 nm. Broad spectral coverage is achieved through the use of a fiberoptic transformer assembly to map the curved focal plane of a fast (f/3) Rowland-circle spectrograph [Tugarinov et al., Rev. Sci. Instrum. 66, 603 (1995)] into a rastered format on the rectangular sensor area of a two-dimensional charge-coupled device (CCD) camera. Vertical grouping of pixels during CCD readout integrates the signal intensity over the height of each spectral segment in the rastered image, minimizing readout time. For the full visible spectrum, readout time is 50 ms. Faster response time (
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1147730