Calibration Systems of the ATLAS Tile Calorimeter

TL;DR

This paper describes the calibration systems of the ATLAS Tile Calorimeter, detailing how various sources are used to monitor and ensure the accuracy and stability of the calorimeter's response in the LHC environment.

Contribution

It provides a comprehensive overview of the TileCal calibration systems and reports recent performance results in calibration accuracy and stability.

Findings

Calibration factors achieved high accuracy

System demonstrated stable performance over time

Multiple calibration sources effectively monitor response

Abstract

TileCal is the hadronic calorimeter covering the most central region of the ATLAS experiment at the LHC. This sampling calorimeter uses iron plates as absorber and plastic scintillating tiles as the active material. A multi-faceted calibration system allows to monitor and equalize the calorimeter response at each stage of the signal production, from scintillation light to digitization. This calibration system is based on signal generation from different sources: a Cs radioactive source, laser light, charge injection and minimum bias events produced in proton-proton collisions. A brief description of the different TileCal calibration systems is given and the latest results on their performance in terms of calibration factors, linearity and stability are presented.