This postdoctoral project focuses on the development of advanced nuclear instrumentation for dose and contamination measurement on decommissioning sites.
The approach is based in particular on online radiophotoluminescence measurement, in order to obtain sensitive radiological information that can be used in real time and adapted to constrained environments.
A major scientific challenge is to understand the physical mechanisms governing this measurement, from the creation of radiation-induced defects to their optical readout.
Silver-related defects play a central role, particularly their lifetime, temporal stability, and influence on signal reproducibility.
Controlling the excitation and emission processes, especially in the infrared range, is essential to improve sensitivity and the signal-to-noise ratio.
The project will aim to identify the limitations associated with weak signals, noise, drifts, component ageing, and disturbances specific to nuclear environments.
It will combine defect physics, optoelectronic instrumentation, acquisition electronics, ionising radiation metrology, and digital signal processing.
Filtering, drift correction, synchronisation, and anomaly detection methods will be developed to make online measurement more reliable.
System miniaturisation and integration will also be investigated to enable measurements as close as possible to the areas of interest.
The expected results will contribute to the experimental validation of the device and to the scientific dissemination of the project through publications, conferences, and supervision activities.