Author:
Ali S.,Arnold H.,Auwens S.L.,Beresford L.A.,Boumediene D.E.,Burger A.M.,Cadamuro L.,Castillo García L.,Corpe L.D.,Da Cunha Sargedas de Sousa M.J.,Dannheim D.,Dao V.,Gabrielli A.,El Ghazali Y.,El Jarrari H.,Gautam V.,Grinstein S.,Guimarães da Costa J.,Guindon S.,Jia X.,Kramberger G.,Liu Y.,Ma K.,Makovec N.,Manzoni S.,Nikolic I.,Perrin O.,Raskina V.,Robles Manzano M.,Rummler A.,Tayalati Y.,Trincaz-Duvoid S.,Visibile A.,Xin S.,Xu L.,Yang X.,Zheng X.
Abstract
Abstract
The High Granularity Timing Detector (HGTD) will be installed in the ATLAS experiment to
mitigate pile-up effects during the High Luminosity (HL) phase of the Large Hadron Collider (LHC)
at CERN. Low Gain Avalanche Detectors (LGADs) will provide high-precision measurements of the time
of arrival of particles at the HGTD, improving the particle-vertex assignment. To cope with the
high-radiation environment, LGADs have been optimized by adding carbon in the gain layer, thus
reducing the acceptor removal rate after irradiation. Performances of several carbon-enriched
LGAD sensors from different vendors, and irradiated with high fluences of
1.5 and 2.5 × 1015 neq/cm2, have been measured in beam test campaigns during the
years 2021 and 2022 at CERN SPS and DESY. This paper presents the results obtained with data
recorded by an oscilloscope synchronized with a beam telescope which provides particle position
information within a resolution of a few μm. Collected charge, time resolution and hit
efficiency measurements are presented. In addition, the efficiency uniformity is also studied as a
function of the position of the incident particle inside the sensor pad.
Subject
Mathematical Physics,Instrumentation
Cited by
5 articles.
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