Göttingen 2025 – scientific programme
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T: Fachverband Teilchenphysik
T 27: Silicon Detectors III (ATLAS + CMS production)
T 27.7: Talk
Tuesday, April 1, 2025, 17:45–18:00, VG 0.111
Module assembly for the ATLAS High Granularity timing detector — •Hendrik Smitmanns1, Jessica Höfner1, Annika Stein1, Frederic Maximilian Matthias Silvan Fischer1, Lucia Masetti1, Theodorus Manoussos1, Jan Ehrecke1, Andrea Brogna2, Atila Kurt2, Fabian Piermaier2, Antonin Zeman2, Quirin Weitzel2, and Steffen Schoenfelder2 — 1University Mainz, Insitut for Physics — 2University Mainz, PRISMA+ Detector Lab
To meet the challenges of the High Luminosity Large Hadron Collider (HL-LHC), especially the increase of pile-up interactions, the ATLAS detector will need to be upgraded. One of the foreseen upgrades is the installation of the High-Granularity Timing Detector (HGTD). The HGTD will mitigate the effects of pile-up in the ATLAS forward region, providing a time resolution of about 30-50 ps per track. The active area consists of 2 double-sided disks per end-cap. Two 2x2 cm2 Low Gain Avalanche Detectors (LGAD) bump-bonded to two ASICs and glued to a flexible PCB form the HGTD basic unit, the so-called module. Multiple modules are glued onto a support unit to form a detector unit, which will be built into the final detector at CERN. Pre-production started at the beginning of 2025 and over the next two years around 1000 modules, 10% of the total detector, will be assembled at Johannes Gutenberg University Mainz, as one of the six production sites. The full module assembly procedure with focus on wire bonding, metrology and the initial testing of the assembled modules is presented.
Keywords: HGTD; ATLAS; LGAD; HL-LHC