[Objectives]
- Impurity species monitoring for plasma operation.
- Radiation power measurement of light impurities such as carbon, oxygen and boron in the divertor region.
- Study of impurity generation and behavior in the divertor region.
[Detectors, Diagnostic Method]
- Flat-field grazing incidence spectrometer with a holographic grating
- Normal incidence spectrometer.
- 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 had been calibrated by a standard light source.
[Specifications]
-Wavelength range & Wavelength resolution | : | 2.5 nm - 130 nm (Grazing incidence spectrometer) λ/Δλ > 400 (at 100nm) 97 nm - 155 nm (Normal incidence spectrometer) λ/Δλ~1000 (at 150nm) |
-Time resolution | : | 20 ms |
Reference
[1] H. Kubo et al., Nuclear Fusion 33 (1993) 1427.