Speaker
Description
The High Luminosity-Large Hadron Collider (HL-LHC) will reach an approximate pile-up of 200 collisions per bunch crossing, three times more than the current Large Hadron Collider. Beginning operation at the end of the decade, it will accumulate up to 3000{fb}^-1, increasing the chances of observing new processes and allowing measurement of rare processes with higher precision. Moreover, the pile-up increase means more particle production, causing higher radiation damage and detector occupancy conditions. Therefore, the current tracking system in the ATLAS detector will be replaced by the new Inner Tracker (ITk), consisting of pixel and strip sub-systems. The ITk is based on silicon detectors called modules, composed of individual sensors and readout electronics. Due to extreme operating temperatures, thermal stresses cause sensors to crack in silicon strip modules and interposers have been introduced in the production process.. Detailed studies of the impact of these interposers have shown that they do not negatively influence the detectors performance.
In the last years significant improvements have been made to the data taking modes have led to improved results with increased operating windows with an efficiency above 99% and noise occupancy below 1e-3. All these results will be demonstrated in the contribution after introducing the setup and general concept of the ITk with a focus on the implications in test beams. A report on progress in analysis of irradiated modules from CERN and DESY test beams, as well as an outlook on ongoing integration studies with the final detector DAQ system and progress towards test beams with large structures will follow. Finally an outlook on the next planned studies will be given.