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Title: Radiation effects in optical link components for future particle physics detectors
Author: Stejskal, Pavel
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2013
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Optical link components used in future particle physics experiments will typically be exposed to intense radiation fields during the lifetime of the experiment and the qualification of these components in terms of radiation tolerance is thus required. Data on semiconductor lasers and photodiodes for use in 10 Gb/s datalinks tested during high-fluence (in excess of 10[to the power of 15] particles/cm2) neutron and pion irradiation in 2009 and 2010 are presented with annealing data. In order to predict the behaviour of a laser irradiated with the different particle fluxes at different locations inside a particle physics experiment, radiation damage in lasers has been modelled. The model describes the degradation of the L-I characteristic of a semiconductor laser undergoing irradiation with the annealing processes taken into account. The robustness of the model has been checked against the experimental data. Additionally, the author’s method to estimate Single Event Upsets in photodetectors using GEANT4 is presented. Use of optoelectronic devices in digital data transmission systems in HEP detectors is also discussed.
Supervisor: Hall, Geoffrey Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral