Speaker
Description
In the research and development for ALICE’s LS3 upgrade, particular emphasis is placed on designing an innovative mechanical and cooling solution for the next generation of low-mass vertex detector. Assuming the use of next-generation monolithic active pixel sensors (MAPS) based on stitched technology, capable of covering large, bent-to-shape surfaces, the focus is on providing the lightest possible substrate with integrated cooling.
Within this development, shared with the CERN EP R&D program, the ALICE ITS3 relies on gas cooling methods trying to achieve a record minimum material budget (<0.09%X_0 per layer). The mechanical support employs carbon foam structures, which also serve as radiators to enhance heat exchange on the sensor area where significant power is dissipated (approximately 1 W/cm²). By the end of 2025, the project will include the production of new qualification models integrating real wafer-scale curved sensors. The successful qualification of these prototypes will enable the production of the final models to be installed in ALICE during LS3.
Carbon foam is also showing strong potential for broader applications in future detectors, including next-generation FCC-ee vertex.
In this context, the EP R&D program is evaluating how air-cooling strategies can be extended to the outer tracker layers, which cover larger areas. These solutions must be compatible with a modular detector design to facilitate the independent manufacturing and qualification of individual sensor modules, including their mechanical and thermal qualification aspects.
This talk presents the progress made in the development of ITS3, highlights key milestones, and explores potential future air-cooling approaches for larger tracking systems.
