Fake track studies for the ATLAS TRT in high pileup scenarios

The Transition Radiation Tracker (TRT) is an integral component of the inner tracking setup of the ATLAS detector at CERN. During Run 3 the increased luminosity provided by the LHC will lead to an $⟨\mu ⟩\ge$ 75 compared to $⟨\mu ⟩\approx$ 25 in 2016. Therefore it is essential to investigate the detector response and the track reconstruction performance in an high occupancy (up to 80%) environment with large numbers of pileup tracks. In order to ensure a optimal tracking it is important to keep the number of fake tracks caused by combining hits from different tracks (including pileup tracks) to a minimum. In this talk studies of the the fake track rates in ATLAS TRT are presented for high pileup scenarios.