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The main purpose of this thesis was to evaluate and develop a new surface temperature measurement system. It works in the near infrared range (890 nm) and is designed to complete the existing thermographic diagnostic of TORE-SUPRA. By using the radiation laws (for a blackbody and the plasma) and the laboratory calibration one can estimate the surface temperature of the observed object. We evaluate the performances and limits of such a device in the harsh conditions encountered in a Tokamak environment. On the one hand, in a quasi ideal situation, this analysis shows that the range of measurement is 600 C to 2500 C. On the other hand, when one takes into account the plasma radiation (with an averaged central plasma density of 6.10{19}m{-3}), we find that the minimum surface temperature rise is to 900 C instead of 700 C. In the near future, according to the development of IR-CCD cameras working in the near infrared range up to 2 micrometres, we will be able to keep the good spatial resolution with an improved lower limit for the temperature down to 150 C.

Additional information

Authors: MOREAU F, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Article: CEN Cadarache Laboratory Report (1996) EUR-CEA-FC-1580
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