Development of divertor IR thermography for ITER

Takeuchi, Masaki; Sugie, Tatsuo; Ogawa, Hiroaki; Ishikawa, Masao; Shimada, Takahiko; Itami, Kiyoshi

In ITER project, Divertor IR Thermography which Japan will procure has been developed. The system design, optical design and evaluation of detected photons were performed based on the measurement requirement. Detected system consists of two color system and spectroscopic system. The derivation of the surface temperature on the divertor plate will be calculated from the combination of the obtained data by the detected system. There are two optical paths consisted of three parts for the observation of outer and inner divertors to be satisfied the spatial resolution of 3 mm. Higher photons than the bremsstrahlung light which was calculated in the case of ITER operation scenario 2 are expected to be obtained, excluding the low temperature range.