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Abstract
| The TileCal is a sampling hadronic calorimeter covering the central region of the ATLAS experiment, with steel as absorber and plastic scintillators as active medium. The scintillators are read out by wavelength shifting fibres to PMTs at the back of each wedge-shaped calorimeter module. The analogue signals from the PMTs are amplified, shaped, and digitized on the detector every 25 ns, and stored on detector in digital pipeline buffers until a trigger decision is received. The data are then read out to the off-detector systems for further processing. The TileCal employs several calibration systems that, together with the collected collision data, provide the basis for response equalisation and monitoring at each stage of the readout path from scintillation light production to energy and time reconstruction. Furthermore, the calorimeter performance has been established with large samples of proton-proton collision data during LHC Run 1 and Run 2. The high-momentum isolated muons have been used to study and validate the electromagnetic scale, while the hadronic response has been probed with isolated hadrons. We present and summarise results of the calorimeter calibration and performance. |