Abstract
The Tile Calorimeter (TileCal) is the central section of the ATLAS hadronic calorimeter at the Large Hadron Collider. Scintillation light produced in the tiles is readout by wavelength shifting fibers and transmitted to photomultiplier tubes (PMTs). The resulting electronic signals from approximately 10000 PMTs are measured and digitized before being further transferred to off-detector data-acquisition systems. Detailed simulations are described in this contribution, ranging from the implementation of the geometrical elements to the realistic description of the electronics readout pulses, including specific noise treatment and the signal reconstruction. Special attention is given to the improved optical signal propagation and the validation with the real particle data.
Highlights
The Tile Calorimer [1] is a central hadronic calorimeter in the ATLAS detector [2] at the LHC
The energy is reconstructed by means of the Optimal Filtering Method and the cell energy is calibrated to the electromagnetic scale
A good agreement between data and Monte Carlo simulations is achieved as can be seen in figure 1
Summary
The Tile Calorimer [1] is a central hadronic calorimeter in the ATLAS detector [2] at the LHC. It consists of a barrel (in the pseudorapidity region |η| < 1.0) and two extended barrels (0.8 < |η| < 1.7). The TileCal is a sampling calorimeter with alternating scintillating tiles (active medium) and steel (absorber). Each calorimeter cell is read out by two photomultipliers on both φ-sides of the cell. Simulations of the Tile Calorimeter can be divided into three parts — simulation, digitization and reconstruction. Thereafter, the read-out samples are processed in the reconstruction which is identical to the procedure applied in data. The energy is reconstructed by means of the Optimal Filtering Method and the cell energy is calibrated to the electromagnetic scale
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