Energy calibration and performance of thick CdTe sensor with 55μm pixel pitch Timepix detector

Julian Fey; Simon Procz; Michael Schütz; Michael Fiederle

doi:10.1117/12.2570496

20 August 2020 Energy calibration and performance of thick CdTe sensor with 55μm pixel pitch Timepix detector

Julian Fey, Simon Procz, Michael Schütz, Michael Fiederle

Author Affiliations +

Proceedings Volume 11494, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXII; 114940G (2020) https://doi.org/10.1117/12.2570496
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

This work presents the characterization and performance of the first 3 mm CdTe sensor connected to a readout chip of the Medipix/Timepix detector family. The integration and parameters of a developed cluster analysis are shown to fully utilize the detector configuration in a gamma camera. Spectroscopic measurements regarding the common radioactive sources 137Caesium, 152Europium and 241Americium are investigated. The absorption efficiency of the 3 mm CdTe sensor is compared to a 0.45 mm CdTe and a 1 mm CdTe detector configuration. The charge sharing effect is successfully reduced with cluster analysis and the thicker sensor profits greatly from the greater absorption efficiency, especially in higher energy ranges (> 100 keV). The information gain of the charge sharing effect regarding cluster size and shape can be further used for identification of the investigated isotopes.

Conference Presentation

Citation Download Citation

Julian Fey, Simon Procz, Michael Schütz, and Michael Fiederle "Energy calibration and performance of thick CdTe sensor with 55μm pixel pitch Timepix detector", Proc. SPIE 11494, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXII, 114940G (20 August 2020); https://doi.org/10.1117/12.2570496

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