Operation and performance of the ATLAS tile calorimeter in LHC Run 2

Abstract

The ATLAS tile calorimeter (TileCal) is the hadronic sampling calorimeter covering the central region of the ATLAS detector at the Large Hadron Collider (LHC). This paper gives an overview of the calorimeter's operation and performance during the years 2015-2018 (Run 2). In this period, ATLAS collected proton-proton collision data at a centre-of-mass energy of 13 TeV and the TileCal was $99.65\%$ efficient for data-taking. The signal reconstruction, the calibration procedures, and the detector operational status are presented. The performance of two ATLAS trigger systems making use of TileCal information, the minimum-bias trigger scintillators and the tile muon trigger, is discussed. Studies of radiation effects allow the degradation of the output signals at the end of the LHC and HL-LHC operations to be estimated. Finally, the TileCal response to isolated muons, hadrons and jets from proton-proton collisions is presented. The energy and time calibration methods performed excellently, resulting in good stability and uniformity of the calorimeter response during Run 2. The setting of the energy scale was performed with an uncertainty of $2\%$. The results demonstrate that the performance is in accordance with specifications defined in the Technical Design Report.

arXiv comment79 pages in total, author list starting page 62, 36 figures, 4 tables, published in Eur. Phys. J. C 84 (2024) 1313. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TCAL-2021-01/

References in corpus (10)

• A Brief Introduction to PYTHIA 8.1
• Parton distributions for the LHC Run II
• Event Generation with Sherpa 2.2
• Operation of the ATLAS trigger system in Run 2
• The ATLAS beam pick-up based timing system
• The ATLAS Data Quality Defect Database System
• The Cesium Source Calibration and Monitoring System of the ATLAS Tile Calorimeter: Design, Construction and Results
• A PMT-Block test bench
• Optics robustness of the ATLAS Tile Calorimeter
• The High Voltage distribution system of the ATLAS Tile Calorimeter and its performance during data taking

Cited by in corpus (1)

• Study of the Radiation Hardness of the ATLAS Tile Calorimeter Optical Instrumentation with Run 2 data