Title of article :
Induced optical absorption of silicate glasses due to gamma irradiation at high temperatures
Author/Authors :
Gusarov، نويسنده , , A. and Huysmans، نويسنده , , S. and Berghmans، نويسنده , , F. and Glebova، نويسنده , , L. and Glebov، نويسنده , , L. and Hodgson، نويسنده , , E.R.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Abstract :
Gamma radiation-induced optical absorption in 75SiO2–22Na2O–3CaO (wt.%) multi-component glass and in the same glass additionally doped with 0.05 wt.% CeO2 has been studied, with irradiations performed at 70, 200, and 350 °C, 25 kGy/h up to a dose of 0.6 MGy. For the undoped glass irradiation at 70 °C produces strong optical absorption from 700 nm down to the UV. Irradiation at 200 °C gives a lower level of optical absorption with a similar band composition. No induced optical absorption has been detected after irradiation at 350 °C. Annealing at 200 °C for 24 h completely suppresses the induced optical absorption. Introduction of cerium increases the level of induced absorption in the UV range for irradiation at 70 °C, and also creates bands stable up to 350 °C. The results show that silica and sapphire, which are considered as main candidate materials for ITER diagnostic windows and other optical components, can potentially be complemented with multi-component silicate glasses. These materials may allow one to control the radioluminescence, and in addition provide a range of refractive indices required for achromatic lenses.
Keywords :
Silicate glass , High temperature irradiation , Annealing , Radiation-induced transmission degradation , ITER
Journal title :
Fusion Engineering and Design
Journal title :
Fusion Engineering and Design