Irradiation studies of multimode optical fibres for use in ATLAS front-end links
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 attenu...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Journal article |
| Idioma: | English |
| Publicado em: |
Elsevier
2000
|
| Resumo: | 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. |
|---|