First Double-Sided End-Cap Strip Module for the ATLAS High-Luminosity Upgrade

The ATLAS Experiment will upgrade its inner tracking system for the High-Luminosity-LHCwith an all-silicon system. The strip part will be based on individual modules, constructed bygluing the front-end hybrids directly onto the strip side of the sensors. These modules will thenbe glued onto a low-mass carbon-fibre based local support structure with integrated services.This paper presents the first double-sided module made from full-size end-cap sensors by gluing modules onto a reduced-size core. A summary on the experience gained in the prototyping process and results obtained from running this module, with emphasis on signal integrity and noise performance will be given.