Speaker
Description
ALICE 3 is pursued as the next-generation heavy-ion detector for LHC Run 5. Its design is driven by the need to achieve unprecedented vertexing performance, tracking over a wide range of transverse momenta combined with good particle identification over an extended pseudorapidity range. In order to achieve a pointing resolution better than 10 µm for transverse momenta of 200 MeV/c, three layers of monolithic pixel sensors with a position resolution of 2.5 µm and a material budget of 0.1% of a radiation length per layer will be installed in a secondary vacuum within the beam pipe. The proximity to the interaction point poses an important challenge in terms of particle hit rate and in turn bandwidth and radiation load. The vertex detector will be surrounded by tracking layers and disks. Particular effort has to be made to achieve spatial and temporal resolution, without exceeding a material budget of ~1% of a radiation length per layer throughout the detector acceptance to achieve the required momentum resolution.
This presentation discusses the design considerations for the Inner Tracker, reviews the performance studies and presents the R&D activities towards the ALICE 3 Inner Tracker.