The High-Granularity Timing Detector for ATLAS at HL-LHC

by Joaquim Piñol

Wednesday 15 Jan 2025, 13:00 → 14:00 Europe/Madrid

IFAE Seminar Room (In-person)

The increased particle flux expected at the HL-LHC poses a serious challenge for the ATLAS detector performance, especially in the forward region which has reduced detector granularity. The High-Granularity Timing Detector (HGTD), featuring novel Low-Gain Avalanche Detector silicon technology, will provide pile-up mitigation and luminosity measurement capabilities, and augment the new all-silicon Inner Tracker in the pseudo-rapidity range from 2.4 to 4.0. Two double-sided layers will provide a timing resolution better than 50ps/track for MIPs throughout the HL-LHC running period, and provide a new timing-based handle to assign particles to the correct vertex. The LGAD technology provides suitable gain to reach the required signal-to-noise ratio, and a granularity of 1.3 × 1.3 mm2 (3.6 M channels in total). The talk will be focused on general HGTD presentation and more specifically on test beam setup and data analysis.