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Abstract: Recently CMOS-MAPS (Monolithic Active Pixel Sensor) sensors have found applications in High Energy Physics (HEP). Their performances made them a golden detector for vertexing. In particular the STAR experiment used them for the first time in HEP and the ALICE collaboration prooved the suitability of this technology for large and complex detectors. CMOS-MAPS are today foreseen for several future detector upgrades and facilities.
The ALICE experiment is preparing the ITS3, an upgrade of its Inner Tracking System for LHC Run 4. The three innermost layers will be replaced by wafer-scale, truly cylindrical, ultra-thin detector layers, made of MAPS. This innovative technology will permit to lower the material budget even further and to improve the tracking and vertexing capabilities. The core technology will be based on 65 nm CMOS sensors.
Moreover, the ALICE collaboration has foreseen a next-generation heavy-ion experiment for LHC Run 5, ALICE3. The idea is to exploit silicon technologies to build an ultra-thin and fast tracker with unprecedented vertexing capabilities in combination with excellent particle identification.