Readiness of the ATLAS Tile Calorimeter for LHC collisions

TL;DR

This paper reviews the performance and calibration status of the ATLAS Tile Calorimeter during initial LHC operations, demonstrating its readiness and precision in detecting particle collisions.

Contribution

It provides a comprehensive overview of the calibration, operation, and performance validation of the Tile Calorimeter for LHC collisions, including calibration precision and energy scale determination.

Findings

Calibration systems' precision below 1%

Energy scale uncertainty of 4%

Successful operation during initial LHC runs

Abstract

The Tile hadronic calorimeter of the ATLAS detector has undergone extensive testing in the experimental hall since its installation in late 2005. The readout, control and calibration systems have been fully operational since 2007 and the detector successfully collected data from the LHC single beams in 2008 and first collisions in 2009. This paper gives an overview of the Tile Calorimeter performance as measured using random triggers, calibration data, data from cosmic ray muons and single beam data. The detector operation status, noise characteristics and performance of the calibration systems are presented, as well as the validation of the timing and energy calibration carried out with minimum ionising cosmic ray muons data. The calibration systems' precision is well below the design of 1%. The determination of the global energy scale was performed with an uncertainty of 4%.