Speaker
Description
The FASER experiment at CERN takes advantage of the enormous flux of hadrons produced at zero-angle at the ATLAS interaction point to perform the first search for low-mass, Long Lived Particles (LLPs) at the LHC.
The present design of the experiment is optimised to measure LLPs decaying into two charged leptons. To extend the discovery potential of the experiment to neutral particles in the final state, a tungsten-silicon pre-shower detector is under construction to enable the discrimination of two photons with O(TeV) energies and separation down to 200 µm.
The new pre-shower will be made of interleaved layers of tungsten absorbers and monolithic silicon pixel sensors in SiGe BiCMOS. The detector ASIC will have hexagonal pixels of 65 µm side, an extended dynamic range for the charge measurement and capability to store the charge information for hundreds of pixels per event with very limited dead area.
A summary of the project, including simulation results and a description of the monolithic ASIC will be presented.
