The Monitoring Program for the ATLAS Tile Calorimeter

The Tile Calorimeter is a steel-scintillator device which constitutes the central hadronic section of the ATLAS Calorimeter. About 12% of the Tile Calorimeter has been exposed to test beams, at CERN, in order to determine the electromagnetic scale and to evaluate its uniformity. During the 2003 calibration periods, an online monitoring program has been developed to ease the setup of correct running condition and the assessment of data quality. The program, developed in C++ and based on the ROOT framework, has been built using the Online Software Service provided by the ATLAS Online Software group and is equipped with a graphical user interface. This application has been intensively used throughout the calibration sessions in 2003 and also during the setup and test with cosmic rays carried out, at the beginning of 2004, on a few modules of TileCal during the pre-assembly of the extended barrel. After a brief overview of ATLAS DAQ and Services, the architecture and features of the Tile Calorimeter monitoring program are described in detail. Performances and successive integrations are discussed in the last part of the paper.