Characterization of a hybrid photon-counting detector based on Timepix4 with a quasi-monochromatic source for spectral X-ray imaging applications

Photon-counting technology offers the potential for substantial transformations in the field of X-ray medical imaging by the implementation of spectral techniques. Hybrid photon-counting detectors, based on a Timepix4 ASIC coupled with a silicon sensor, were studied. A preliminary characterization of the X-ray energy response was performed using a quasi-monochromatic X-ray irradiation setup. This system, developed at University of Ferrara, is based on Bragg’s diffraction by a mosaic crystal and it is capable of providing X-rays with energy tunable between 8 and 35 keV. This contribution presents the characterization of the irradiation system and preliminary tests to study the detector response to radiation.