Year: 2025
Type: conference-paper
Abstract: The ALICE experiment at CERN is developing an upgrade to its vertexing detector in order to improve the impact parameter resolution at low transverse momenta, with a target timeline for installation during the third long shutdown of the LHC (2026–28). The concept consists in replacing the three innermost layers with wafer-scale monolithic active pixel sensors bent into truly cylindrical sensors wrapped around the beam pipe. The dramatic reduction in material budget (0.35% X$_0$ to 0.07% X$_0$ per layer), together with a thinner beam pipe (18 to 16.5 mm in radius) and a first layer closer to the interaction point (23 to 19 mm), are key features to increase the pointing resolution by at least a factor of 2 over all momenta. This contribution provides an overview on the plans, challenges and status of the design and validation of the first wafer-scale silicon detector for high energy physics.
DOI: 10.22323/1.468.0126
Author: Valerio Sarritzu
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W4409766090