Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 115: Detectors 10 (semiconductors)
T 115.4: Talk
Friday, March 8, 2024, 09:45–10:00, Geb. 30.23: 2/1
Sensor Performance of the ATLAS High Granularity Timing Detector — •Theodoros Manoussos1, 2, Xiao Yang1, Guilherme Saito3, Xiangxuan Zheng4, Dominik Dannheim1, Gregor Kramberger5, Stefan Guindon1, Stefano Manzoni1, Giulia Di Gregorio1, and Lucia Masetti2 — 1CERN — 2Johannes Gutenberg-Universität Mainz, Deutschland — 3Universitade de São Paulo, Brasil — 4University of Science and Technology of China, Hefei, China — 5Institut Jožef Stefan, Ljubljana, Slovenia
The increase of the instantaneous luminosity at the HL-LHC will be a challenge for the ATLAS detector. The pile-up is expected to increase on average to 200 interactions per bunch crossing. To mitigate these effects a High Granularity Timing Detector (HGTD) will be integrated in the end-cap regions of ATLAS, covering a pseudo-rapidity range of 2.4 < |η| < 4.0. HGTD, which also serves as a luminosity monitor, aims for a single track time resolution for MIPs of 30 ps at the beginning of the lifetime, up to 50 ps after a maximum fluence of 2.5 × 1015 neq/cm2. The high precision timing information improves the assignment of tracks the correct vertex. HGTD sensors are based on the Low Gain Avalanche Detector (LGAD) technology. Each sensor is a 15 × 15 array of 1.3 × 1.3 mm LGAD pads. Along with the sensors, an equal amount of Quality Control-Test Structures is produced, to monitor the quality and uniformity of the sensors and extract technology parameters during the production. This contribution presents the status of the sensor quality control and the non-irradiated and irradiated LGAD performance obtained in a series of test-beam campaigns.
Keywords: ATLAS Phase II Upgrade; HGTD; LGAD; Sensor QA/QC; Test Beam