Study on optimal scintillation detectors for ultrafast electron beam X-ray CT scanners

Currently, ROFEX systems rely on CZT detectors to convert X-rays directly into electric signals. Despite simplicity and high X-ray detection efficiency, the performance of the CZT detectors is limited as a consequence of polarization effects that saturate the detector output, and hence degrades the quality of the reconstructed image. Furthermore, CZT detectors require high bias voltage (1-2 KV) to operate besides manufacturing challenges due to the limited crystal growth of the CZT material. With the intention to overcome the above-stated problems, scintillation-based detectors have been suggested to replace the CZT detectors in ROFEX scanners. For the design of an optimal scintillation-based detector system, suitable scintillators, photodetectors as well as a suitable front-end have to be selected, analyzed and tested.