https://doi.org/10.1051/epjconf/202328801001
A High-Granularity Timing Detector for the ATLAS Phase-II upgrade
Institut National de Physique nucléaire et de Physique des particules (IN2p3)
Published online: 21 November 2023
The High Luminosity Large Hadron Collider (HL-LHC) will reach an integrated luminosity up to 4 000 fb-1 from 2029 to 2039. The number of collisions per bunch crossing will significantly increase, rising a challenge in terms of pileup mitigation that will have a severe impact on the ATLAS detector performance. Therefore, the HighGranularity Timing Dectector (HGTD) will be installed in front of the Liquid Argon Calorimeter (LAr) covering the forward region with a pseudo-rapity from 2.4 to 4.0. HGTD will provide a time measurement of the time for Minimum Ionizing Particles (MIP) with a 30 ps per track resolution and will be coupled to the futur tracking detector (ITk) to assign each particle to a vertex. HGTD will be composed of 3.6 million readout channels, including a Low Gain Avalanche Diode (LGAD) based technology sensors and a front-end readout chip (ASIC) based on the 130 nm CMOS technology. These latest will be combined and assembled to produce a module, that will be installed and glued on a support unit. This article presents a general overview of the HGTD project, its status and some highlights of sensitive components.
Key words: HL-LHC / ATLAS / HGTD / timing detector
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
