The results of irradiation tests on Ce-doped sol-gel silica using x- and γ-rays up to 10 kGy are reported in order to investigate the radiation hardness of this material for high-energy physics applications. Sol-gel silica fibers with Ce concentrations of 0.0125 and 0.05 mol. % are characterized by means of optical absorption and attenuation length measurements before and after irradiation. The two different techniques give comparable results, evidencing the formation of a main broad radiation-induced absorption band, peaking at about 2.2 eV, related to radiation-induced color centers. The results are compared with those obtained on bulk silica. This study reveals that an improvement of the radiation hardness of Ce-doped silica fibers can be achieved by reducing Ce content inside the fiber core, paving the way for further material development.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
Cova, F., Moretti, F., Fasoli, M., Chiodini, N., Pauwels, K., Auffray, E., Lucchini, M. T., Baccaro, S., Cemmi, A., Bártová, H., & Vedda, A. (2018). Radiation hardness of Ce-doped sol-gel silica fibers for high energy physics applications. Optics Letters, 43(4), 903 - 906. https://doi.org/10.1364/OL.43.000903