Calibration and Performance of the ATLAS Tile Calorimeter

TL;DR

This paper discusses the calibration systems of the ATLAS Tile Calorimeter, detailing their performance and stability in measuring hadronic particles, jets, and missing energy at the LHC.

Contribution

It provides a comprehensive overview of the TileCal calibration systems and presents the latest performance results using cosmic muons and collision data.

Findings

Calibration factors and linearity are maintained within specifications.

The calorimeter demonstrates stable energy scale and time resolution.

Performance metrics meet the requirements for accurate physics measurements.

Abstract

The Tile Calorimeter (TileCal) is the hadronic calorimeter covering the most central region of the ATLAS experiment at the LHC. It is a key detector for the measurement of hadrons, jets, tau leptons and missing transverse energy. The TileCal calibration system comprises radioactive source, laser and charge injection elements and it allows to monitor and equalize the calorimeter response at each stage of the signal production, from scintillation light to digitization. This contribution presents a brief description of the different TileCal calibration systems as well as the latest results on their performance in terms of calibration factors, linearity and stability. The performance of the Tile Calorimeter with the cosmic muons and collision data is also presented, including the absolute energy scale, time resolution and associated stabilities.