Silicon strip detectors for ATLAS at the HL-LHC upgrade

The present ATLAS silicon strip tracker (SCT) and transition radiation tracker (TRT) are to be replaced with new silicon strip detectors as part of the inner tracker system (ITK) for the Phase-II upgrade of the Large Hadron Collider, HL-LHC. We have carried out intensive R&D programs based on n+-on-p microstrip detectors to fabricate improved radiation hard strip detectors that can survive the radiation levels corresponding to the integrated luminosity of up to 3000 fb−1. We describe the main specifications for this year's sensor fabrication and the related R&D results, followed by a description of the candidate schema for module integration.