Title

Induced Optical Absorption Of Silicate Glasses Due To Gamma Irradiation At High Temperatures

Keywords

Annealing; High temperature irradiation; ITER; Radiation-induced transmission degradation; Silicate glass

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. © 2009 Elsevier B.V. All rights reserved.

Publication Date

1-1-2010

Publication Title

Fusion Engineering and Design

Volume

85

Issue

1

Number of Pages

1-6

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.fusengdes.2009.04.007

Socpus ID

72149098553 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/72149098553

This document is currently not available here.

Share

COinS