A high granularity timing detector for the ATLAS Phase-II upgrade: Project overview and status

Abstract

A High Granularity Timing Detector (HGTD) has been proposed for the ATLAS Phase-II upgrade to mitigate the pile-up effects at the High-Luminosity Large Hadron Collider (HL-LHC). The HGTD is based on silicon devices, Low Gain Avalanche Detectors (LGAD), aiming to provide 30–50 ps time resolution per track. Significant progress has been made in the development of various detector components, particularly the radiation-resistant sensor and readout chip. This proceeding concisely summarizes the project overview and current status of the HGTD project.