Irradiation studies of multimode optical fibres for use in ATLAS front-end links

Journal article

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 approximately 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 approximately 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.

Authors: Mahout, G; Pearce, M; Andrieux, M; Arvidsson, C; Charlton, D

• Publication status: Published
• Publisher: Elsevier
• Journal: NUCLEAR INSTRUMENTS and METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
• Volume: 446
• Issue: 3
• Pages: 426-434
• Publication date: 2000-05-21
• DOI: 10.1016/S0168-9002(99)01275-9
• ISSN: 0168-9002
• Language: English
• Keywords: ATLAS; multimode; radiation tolerance; optical fibres