Speaker
Description
The Phase-II upgrade of the LHC during Long Shutdown 3 (LS3) aims to reach a peak instantaneous luminosity of $7.5\times 10^{34}\mathrm{cm^{-2}s^{-1}}$, which corresponds to an average of about 200 inelastic proton-proton collisions per beam-crossing. To cope with these conditions, the ATLAS tracking system will be replaced by an all-silicon Inner Tracker (ITk). The ITk will be operational for more than ten years, during which time ATLAS is expected to record a total dataset of $4000\,\mathrm{fb^{-1}}$. The pixel detector of the ITk is based on hybrid planar pixel modules with new silicon sensors and readout chips. This talks focuses on test beam campaigns carried out at the CERN SPS and DESY in order study the pixel position and efficiencies for the on-going R\&D of ITk pixel modules. Results for several silicon sensor designs with different punch through structures and the first large structure prototype front-end readout chip, RD53A, will be presented.
