Author/Authors :
Mahout، نويسنده , , G and Pearce، نويسنده , , M and Andrieux، نويسنده , , M-L and Arvidsson، نويسنده , , C-B and Charlton، نويسنده , , D.G and Dinkespiler، نويسنده , , B and Dowell، نويسنده , , J.D and Gallin-Martel، نويسنده , , L and Homer، نويسنده , , R.J. and Jovanovic، نويسنده , , P and Kenyon، نويسنده , , I.R and Kuyt، نويسنده , , G and Lundquist، نويسنده , , J and Mandi?، نويسنده , , I and Martin، نويسنده , , O and Shaylor، نويسنده , , H.، نويسنده ,
Abstract :
The radiation tolerance of three multimode optical fibres has been investigated to establish their suitability for the use in the front-end data links of the ATLAS experiment. Both gamma and neutron irradiation studies are reported. A step-index fibre with a pure silica core showed an induced attenuation of ∼0.05 dB/m at 330 kGy(Si) and 1×1015 n(1 MeV Si)/cm2 and is suitable for use with the inner detector links which operate at 40–80 Mb/s. A graded-index fibre with a predominantly germanium-doped core exhibits an induced attenuation of ∼0.1 dB/m at 800 Gy(Si) and 2×1013 n(1 MeV Si)/cm2 and is suitable for the calorimeter links which operate at 1.6 Gb/s. Measurements of the dose rate dependence of the induced attenuation indicate that the attenuation in ATLAS will be lower.
Keywords :
Multimode , ATLAS , optical fibres , Radiation tolerance
