ATLAS Tracking Detector Upgrade studies using the Fast Simulation Engine (FATRAS)

The successful physics program Run-1 of the LHC has put a strong emphasis on design studies for future upgrades for LHC detectors and future accelerators. A novel technique has been implemented that allows fast definitions of realistic detector layouts in the ATLAS TrackingGeometry library and run the fast simulation program (FATRAS), followed by a fast digitisation and reconstruction chain. The code is also implemented without dependencies on the ATLAS software in the context of the Future Collider Collaboration (FCC) framework.