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 | : λ/ Δλ > 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.