| Accueil > CERN Experiments > LHC Experiments > ATLAS > ATLAS Preprints > Irradiation studies of multimode optical fibres for use in ATLAS front-end links |
| Article | |
| Title | Irradiation studies of multimode optical fibres for use in ATLAS front-end links |
| Author(s) | Mahout, G ; Pearce, M ; Andrieux, M L ; Arvidsson, C B ; Charlton, D G ; Dinkespiler, B ; Dowell, John D ; Gallin-Martel, L ; Homer, R James ; Jovanovic, P ; Kenyon, Ian Richard ; Kuyt, G ; Lundqvist, J M ; Mandic, I ; Martin, O ; Shaylor, H R ; Stroynowski, R ; Troska, Jan K (Imperial Coll., London) ; Wastie, R L ; Weidberg, A R ; Wilson, J A ; Ye, J |
| Affiliation | (Sch of Phys & Astron, Birmingham Univ) |
| Publication | 2000 |
| In: | Nucl. Instrum. Methods Phys. Res., A 446 (2000) 426-34 |
| DOI | 10.1016/S0168-9002(99)01275-9 |
| Subject category | Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| 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*10/sup 15/ n(1 MeV Si)/cm/sup 2/ 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*10/sup 13/ n(1 MeV Si)/cm/sup 2/ 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. (30 refs). |