Speaker
Description
AstroPix is a novel monolithic High-Voltage CMOS (HV-CMOS) active pixel sensor designed for use in medium-range gamma-ray observatories like AMEGO-X. To meet mission requirements, the sensor must demonstrate low power consumption (< 1.5 mW/cm2) and deliver a required dynamic range between 25 and 700 keV with an energy resolution below 10% at 122 keV. The third sensor version features a pixel matrix of 35x35 pixels with a 500 um pitch. A coordinate readout scheme is implemented by connecting pixels via logical OR lines along both rows and columns. This provides independent row and column signals which are matched to pinpoint the event location. To maximize the absorption probability of the photons, full depletion of the sensor is critical. We are evaluating the device performance, including detection efficiency, spatial resolution, and depletion depth, in a dedicated testbeam environment at the DESY II Testbeam Facility. Utilizing a reference tracking telescope, we can precisely analyze the device-under-test performance by direct data comparison under controlled conditions. This talk will present the integration of the AstroPix v3 sensor within the beam telescope at the DESY II Testbeam Facility, along with first experimental results from the recent beamtime.