Abstract
The Tile Calorimeter (TileCal) is the central scintillator-steel sampling hadronic calorimeter of the ATLAS experiment at the LHC . Jointly with other calorimeters it is designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. The scintillation light produced in the scintillator tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The analog signals from the PMTs are amplified, shaped and digitized by sampling the signal every 25 ns. The TileCal frontend electronics reads out the signals produced by about 10000 channels measuring energies ranging from ∼30 MeV to ∼2 TeV . Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The performance of the calorimeter has been established with cosmic ray muons and the large sample of the proton-proton collisions. The response of high momentum isolated muons is used to study the energy response at the electromagnetic scale, isolated hadrons are used as a probe of the hadronic response and its modelling by the Monte Carlo simulations. The calorimeter time resolution is studied with multijet events. Results on the calorimeter operation and performance are presented, including the calibration, stability, absolute energy scale, uniformity and time resolution. These results show that the TileCal performance is within the design requirements and has given essential contribution to reconstructed objects and physics results.
Highlights
ATLAS detectorHadronic Tile Calorimeter 12 m ATLAS is the multipurpose detector at the LHC. Tile Calorimeter is the hadronic sampling detector within ATLAS Consists of internal tracker, Located at the outer barrel of the electromagnetic and hadronic calorimeters, ATLAS calorimetry system and external muon spectrometer. Allows a wide spectrum of high energy physics studies both within the Standard Model and Beyond. Intended for energy measurements of jets, single hadrons, tau-particles and missing transverse energyTile Calorimeter structureLong barrel (LB) η < 1. 0 Extended barrel (EB) 0. 8 < η < 1. 7
Tile Calorimeter is the sampling detector made of plastic scintillator and steel as absorber
Cs source moved through all the cells allows to equalise scintillator response (CQY)
Summary
Tile Calorimeter structureLong barrel (LB) η < 1. 0 Extended barrel (EB) 0. 8 < η < 1. 7. Tile Calorimeter is the hadronic sampling detector within ATLAS Tile Calorimeter is the sampling detector made of plastic scintillator and steel as absorber (scintillator only in crack/gap cells) Performed using various calibration systems (with precision of 1% of the cell response)
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