Radiation-hardness measurements of high OH- content quartz fibres irradiated with 24 GeV protons up to 1.25 Grad


Cankoçak K., Bakirci M., ÇERÇİ S., Gülmez E., Merlo J., Onel Y., ...More

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol.585, no.1-2, pp.20-27, 2008 (SCI-Expanded) identifier

Abstract

We investigated the darkening of two high OH- content quartz fibres irradiated with 24 GeV protons at the Cern PS facility IRRAD. The two tested fibres have a 0.6 mm quartz core diameter, one with hard plastic cladding (qp) and the other with quartz cladding (qq). These fibres were exposed at about 1.25 Grad in 3 weeks. The fibres became opaque below 380 nm and in the range 580-650 nm. The darkening under irradiation and damage recovery after irradiation as a function of dose and time are similar to what we observed with electrons. The typical attenuation at 455 nm are 1.44 ± 0.22 and 2.20 ± 0.15 dB / m at 100 Mrad for qp and qq fibres, respectively. The maximum damage recovery is also observed near this wavelength. © 2007 Elsevier B.V. All rights reserved.