Wide-spectral-band Spectrometer for Divertor
(Two-dimensional Spatial Measurement)

Wide-spectral-band Spectrometer for Divertor
(Two-dimensional Spatial Measurement)

[Objectives]
To observe visible spectra with two-dimensional spatial resolution in the divertor region. The spectrometer has 92 view channels (vertically 60 channels, horizontally 32 channels) with a spatial resolution of ~1cm. It covers a spectral range of 350 - 800nm. From the measurement, it is possible to obtain spatial distribution of spectra intensities using a computer tomography technique.

[Diagnostic method]
Light collected by lenses is transmitted through optical fivers (~300m) from JT-60U to the spectrometer placed in the diagnostic room. The light is dispersed to the spectrometer with camera lenses to suppress chromatic aberrations and astigmatism, and detected with a back-illuminated CCD camera.

[Specifications]