Enhancing energy and position resolution in charge-integrating pixel detectors with clustering and interpolation algorithms

If the pitch of a segmented X-ray detector is small enough, a single photon will induce signal in multiple neighbouring pixels. This effect in know as charge-sharing and leads to position resolution degradation and a low-energy tail in the energy spectrum. To benefit from the advantages of small pixel detectors (e.g. spatial resolution), charge-sharing must be addressed and corrected. We evaluate the performance of clustering and interpolation algorithms with identical reference data (flat-fields and knife-edge measurements) for two charge-integrating small pixel detectors: ePix100 (50x50 µm² pixels) and strixel JUNGFRAU (25x225 µm² pixels) with iLGAD sensor.