Journal article Open Access

Radiation hardness of Ce-doped sol-gel silica fibers for High Energy Physics applications

Cova, Francesca; Moretti, Federico; Fasoli, Mauro; Chiodini, Norberto; Pauwels, Kristof; Auffray, Etiennette; Lucchini, Marco Toliman; Baccaro, Stefania; Cemmi, Alessia; Bartova, Hana; Vedda, Anna

The results of irradiation tests on Ce-doped sol-gel
silica using X- and g-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 mol% 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.

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