Performance study of LAr calorimeter trigger system after Phase-I upgrade

During the last long shutdown of LHC, the Phase-I upgrade of ATLAS liquid argon calorimeter has been completed. This upgrade improves the trigger system in order to prepare it for high-luminosity LHC. A commissioning process is now ongoing to make sure that the trigger system is operational. This report will give an overview of my project as a summer student, analyzing data of the digital trigger of liquid argon calorimeter to study the performance of the system.