Detector Seminar: Monolithic Silicon Detector Applications at UniGe

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Overview

The use of MAPS has an enormous potential in the next decades in many fields. After several years of successful R&D with monolithic pixel detector with excellent timing resolution obtained using 130nm SiGe BiCMOS technology, UniGe is implementing this technology in two projects.

1. The FASER experiment at the LHC will be instrumented with a high precision W-Si preshower to identify and reconstruct electromagnetic showers produced by two O(TeV) photons at distances down to 200µm. The new detector features a monolithic silicon ASIC with hexagonal pixels of 65 µm side, extended dynamic range for the charge measurement and capability to store the charge information for thousands of pixels per event. A description of the pre-shower and its expected performance will be presented together with the design of the monolithic ASIC and the lab and test beam results of the pre-production ASIC.
2. Together with the University Hospital of Luzern and the École Polytechnique Fédérale de Lausanne, the University of Geneva has launched the 100µPET project that aims to produce a small-animal PET scanner with ultra-high resolution. This prototype, which will use a stack of 60 monolithic silicon pixel sensors as a detection medium, will provide volumetric spatial resolution one order of magnitude better than today’s best operating PET scanners. The R&D on the optimisation of the monolithic pixel ASIC, the readout system and the mechanics, as well as the simulation of the scanner performance, will be presented.