ATLAS experiment Hadron calorimeter Observations and Data Analysis System

DCS-system studies and working on the ATLAS experiment is one of the most important issues for proper operation. The task is considered as the DCS interface as well as the measured data, which is necessary for the detector colibrations in order not to get incorrect result of the experiment. The results obtained by us is checked with the help of a competent person. In this paper, we discuss an experiment ATLAS Hadron Calorimeter, its working principle and the history of data storage process.