Speaker
Description
The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment, using steel as the absorber and plastic scintillators as the active medium. The scintillation light is collected by wavelength-shifting fibres and read out by photomultiplier tubes (PMTs). The analogue signals are amplified, shaped, digitized at 40 MHz and stored on the detector until a trigger decision is received. The TileCal front-end electronics reads out the signals produced by about 9852 channels, measuring energies ranging from about 30 MeV to about 2 TeV.
The detector response is continuously monitored and calibrated at each stage, from scintillation light production to signal reconstruction. During the LHC Run 3, high-momentum isolated muons have been used to validate the electromagnetic energy scale, while isolated hadrons provide complementary studies of the hadronic response. The calorimeter time resolution is evaluated using multi-jet events.
This contribution presents the latest TileCal performance and operational experience from the LHC Run 3, including calibration, detector stability, absolute energy scale, response uniformity and time resolution.