Radioluminescence behaviour for electron irradiated KS-4V

KS-4V, a low OH silica, is being considered for use in different fusion applications such as diagnostic windows and remote handling optical transmission components. For these applications radioluminescence (RL) is an important issue. A systematic study of RL as a function of temperature, dose rate and dose has been made using 1.8 MeV electron irradiations. The behaviour has been compared with KU1 quartz glass (high OH content) and the results indicate that KU1 is much better than KS-4V in terms of RL. Intense RL bands associated with self trapped excitons are observed for KS-4V but not for KU1. Furthermore the KS-4V RL exhibits a complex dependence on irradiation temperature, however the RL intensity decreases with irradiation dose.