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Overview of the ATLAS High-Granularity Timing Detector: project status and result

The increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to L ≃ 7.5 × 1034 cm−2s−1 will have a severe impact on the ATLAS detector reconstruction and trigger performance. The end-cap and forward region where the liquid Argon calorimeter has coarser granularity and...

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Autor principal: El Ghazali, Yassine
Lenguaje:eng
Publicado: 2023
Materias:
Acceso en línea:http://cds.cern.ch/record/2860192
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author El Ghazali, Yassine
author_facet El Ghazali, Yassine
author_sort El Ghazali, Yassine
collection CERN
description The increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to L ≃ 7.5 × 1034 cm−2s−1 will have a severe impact on the ATLAS detector reconstruction and trigger performance. The end-cap and forward region where the liquid Argon calorimeter has coarser granularity and the inner tracker has poorer momentum resolution will be particularly affected. A High Granularity Timing Detector (HGTD) will be installed in front of the LAr end- cap calorimeters for pile-up mitigation and luminosity measurement. The HGTD is a novel detector introduced to augment the new all-silicon Inner Tracker in the pseudo-rapidity range from 2.4 to 4.0, adding the capability to measure charged-particle trajectories in time as well as space. Two silicon-sensor double-sided layers will provide precision timing information for minimum-ionising particles with a resolution as good as 30 ps per track in order to assign each particle to the correct vertex. Readout cells have a size of 1.3 mm × 1.3 mm, leading to a highly granular detector with 3.7 million channels. Low Gain Avalanche Detectors (LGAD) technology has been chosen as it provides enough gain to reach the large signal over noise ratio needed. The requirements and overall specifications of the HGTD will be presented as well as the technical design and the project status. The R&D effort carried out to study the sensors, the readout ASIC, and the other components, supported by laboratory and test beam results, will also be presented.
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spelling cern-28601922023-05-30T21:36:21Zhttp://cds.cern.ch/record/2860192engEl Ghazali, YassineOverview of the ATLAS High-Granularity Timing Detector: project status and resultParticle Physics - ExperimentThe increase of the particle flux (pile-up) at the HL-LHC with instantaneous luminosities up to L ≃ 7.5 × 1034 cm−2s−1 will have a severe impact on the ATLAS detector reconstruction and trigger performance. The end-cap and forward region where the liquid Argon calorimeter has coarser granularity and the inner tracker has poorer momentum resolution will be particularly affected. A High Granularity Timing Detector (HGTD) will be installed in front of the LAr end- cap calorimeters for pile-up mitigation and luminosity measurement. The HGTD is a novel detector introduced to augment the new all-silicon Inner Tracker in the pseudo-rapidity range from 2.4 to 4.0, adding the capability to measure charged-particle trajectories in time as well as space. Two silicon-sensor double-sided layers will provide precision timing information for minimum-ionising particles with a resolution as good as 30 ps per track in order to assign each particle to the correct vertex. Readout cells have a size of 1.3 mm × 1.3 mm, leading to a highly granular detector with 3.7 million channels. Low Gain Avalanche Detectors (LGAD) technology has been chosen as it provides enough gain to reach the large signal over noise ratio needed. The requirements and overall specifications of the HGTD will be presented as well as the technical design and the project status. The R&D effort carried out to study the sensors, the readout ASIC, and the other components, supported by laboratory and test beam results, will also be presented.ATL-HGTD-SLIDE-2023-198oai:cds.cern.ch:28601922023-05-30
spellingShingle Particle Physics - Experiment
El Ghazali, Yassine
Overview of the ATLAS High-Granularity Timing Detector: project status and result
title Overview of the ATLAS High-Granularity Timing Detector: project status and result
title_full Overview of the ATLAS High-Granularity Timing Detector: project status and result
title_fullStr Overview of the ATLAS High-Granularity Timing Detector: project status and result
title_full_unstemmed Overview of the ATLAS High-Granularity Timing Detector: project status and result
title_short Overview of the ATLAS High-Granularity Timing Detector: project status and result
title_sort overview of the atlas high-granularity timing detector: project status and result
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2860192
work_keys_str_mv AT elghazaliyassine overviewoftheatlashighgranularitytimingdetectorprojectstatusandresult