Author/Authors :
W and Cankocak، نويسنده , , K. and Bak?rc?، نويسنده , , M.N. and Cerçi، نويسنده , , S. and Gülmez، نويسنده , , E. and Merlo، نويسنده , , J.P. and Onel، نويسنده , , Y. and ?zok، نويسنده , , F. and Schmidt، نويسنده , , I. and S?nmez، نويسنده , , N.، نويسنده ,
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.
Keywords :
fibre , Attenuation , radiation , quartz
