VUV Spectrometer for Main Plasma
[Objectives]
-Impurity species monitoring for plasma operation.
-Density measurement of light impurities such as carbon, oxygen
and boron.
-Study of impurity behavior.
[Detectors, Diagnostic Method]
-Flat-field grazing incidence spectrometer with a holographic
grating.
-Spectral lines are detected by a multi-channel detector composed
of a micro channel plate (MCP), a fiber plate and a 1024 ch array
sensor.
-The sensitivity of this spectrometer is calibrated by the branching
ratio method relatively.
[Specifications]
| -Wavelength range |
: |
0.5 nm - 40 nm |
| -Wavelength resolution |
: |
 /
> 50 (at 5nm) |
| -Time resolution |
: |
20 ms |
[Reference]
[1] T. Sugie et al., Kakuyugo Kenkyu 59, supplement (1988)
157.
[2] H. Kubo et al., Rev. Sci. Instr. 59 (1988) 1515.
[3] H. Nagata et al., Nucl. Instrum & Methods A294
(1990) 292.