The new monolithic ASIC of the preshower detector for di-photon measurements in the FASER experiment at CERN

TL;DR

This paper introduces a new monolithic ASIC-based preshower detector for the FASER experiment at CERN, offering enhanced spatial and temporal resolution for detecting light, weakly-interacting particles.

Contribution

It presents the design, fabrication, and initial testing results of a novel monolithic ASIC for the FASER preshower detector, improving detection capabilities.

Findings

Prototype chip demonstrates high spatial resolution

Achieved large charge dynamic range

Initial tests show promising performance

Abstract

The ForwArd Search ExpeRiment (FASER) is an experiment searching for new light and weakly-interacting particles at CERN's Large Hadron Collider. FASER is composed of different sub-detectors, including silicon microstrip detectors, scintillator counters and an electromagnetic calorimeter. In this paper, a new preshower detector for the FASER experiment is presented. The new detector, based on monolithic pixel ASICs, will provide excellent spatial and time resolutions and a large charge dynamic range. First results from a prototype chip produced by IHP in 130 nm SiGe BiCMOS technology are shown.