System Tests for the ATLAS ITk Strip Detector System for the Phase-II LHC Upgrade

The next phase of the Large Hadron Collider (LHC), the High-Luminosity LHC, will see an increase in particle densities and radiation levels by more than a factor of ten. To cope with these new conditions, the innermost layers of the ATLAS detector will need to be faster, more granular, and more resistant to radiation. This is why the current ATLAS inner detector will be completely replaced by the upgraded Inner Tracker (ITk), which will consist of several layers of silicon particle detectors. The innermost layers will be composed of silicon pixel sensors, and the outer layers will consist of silicon microstrip sensors. This contribution focuses on the strip region of the ITk. We will present results of large-scale system tests on ITk strip substructures (staves) using realistic powering, cooling, and detector control systems, with an emphasis on calibration, cross-talk, and cooling scans.