ATLAS Detector upgrade and performance

The ATLAS collaboration will upgrade the experiment in a three phase program. The upgrade program aims to maintain and improve the experiment's performance while LHC delivers increasing luminosity resulting in pile-up and challenging reconstruction and triggering. The presentation gives a brief overview of the present performance followed by the description of the ATLAS upgrade program. The plans for the upgrade after the current LS1 shutdown are described as well as the detector upgrades after 2018. The presentation concludes with a summary of the plans and R&D for the tracker replacement in 2022.