Orateur
Description
The CERN proposed $e^+e^-$ Future Circular Collider (FCC-ee) is designed as an electroweak, flavour, Higgs and top factory with unprecedented luminosities. Many measurements at the FCC-ee will rely on the precise determination of the vertices, measured by dedicated vertex detectors.
All vertex detector designs use Monolithic Active Pixel Sensors (MAPS) with a single-hit resolution of ≈3 µm and a material budget as low as 0.25% $X/X0$ per detection layer, which is within specifications for most of the physics analyses.
This contribution presents the status of the R&D on fully engineered vertex detector, together with the challenges due to its cooling and integration with the collider beam pipe. Discussions on an ultra-light vertex detector layout using curved wafer-scale MAPS are also presented, which allows reducing the material budget by about a factor of four, at the expenses of some losses in efficiency.
