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Description
The ALICE Collaboration is preparing for the next phase of its physics program with a full overhaul of its detector, also called ALICE 3, which will be installed during Long Shutdown 4 of the Large Hadron Collider (LHC).
The ALICE 3 tracking system will rely exclusively on Monolithic Active Pixel Sensors (MAPS) fabricated using TPSCo’s 65 nm CMOS imaging process. To investigate how design parameters influence the performance of the sensor, several sensor prototypes have been developed to study properties such as in-pixel efficiencies, detection efficiency, and spatial resolution. Among these, the Analogue Pixel Test Structure (APTS), designed within the ITS3 project, serves to evaluate the analogue performance of the sensor technology.
For the characterization of the APTS, test beam measurements were performed at the Electron Stretcher Facility (ELSA) in Bonn using a babyMOSS telescope, based on Monolithic Stitched Sensor (MOSS) technology and representing the first full-scale prototype of the ITS3 sensor family.
During these measurement campaigns, selected APTS devices were irradiated at Bonn’s Isochronous Cyclotron, enabling studies of radiation damage.
This contribution presents the methodology and results of these test beam measurements. This work is supported by BMFTR.