Timepix4 characterization with monochromatic X-rays at the Elettra synchrotron facility

Timepix4 is the latest generation application-specific integrated circuit (ASIC) of the Medipix family, developed by the Medipix4 Collaboration. A characterization of a Timepix4 assembly bump-bonded to a planar 300 m thick silicon pixelated sensor has been performed by using monochromatic X-rays at the Elettra synchrotron facility (Trieste, Italy). In particular, a calibration of the ToT against the energy released in the Si detector has been performed for each pixel, to optimize energy resolution. A preliminary analysis to estimate the detector photon counting linearity and pixel readout dead time was also carried out.