Speaker
Description
SPring-8 is a large-scale 3rd-generation synchrotron facility, exploiting several high-energy beamlines up to 115 keV. Direct photon-counting detectors, equipped with Cadmium Telluride sensors, are widely used in this context. However, some limitations have been identified during beamline tests, such as a non-uniform time-dependent response during irradiation and a persistent signal after irradiation, which make the use of CdTe sensors challenging for certain applications. To systematically and quantitatively study the time-dependent response of detectors equipped with high-Z sensors, a specific protocol has been developed in our laboratory, using photons with energies up to 49 keV. This protocol will be presented at the workshop, along with a concrete example of results obtained from the study of the persistent signal observed in CdTe sensors after irradiation, as well as the associated decay time.