Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 90: Silicon Detectors VII (ATLAS + CMS phase-2)

T 90.1: Vortrag

Freitag, 4. April 2025, 09:00–09:15, VG 0.111

The ATLAS ITk cell integration site in Bonn — •Alexandra Wald, Klaus Desch, Matthias Hamer, Florian Hinterkeuser, Nico Klein, and Dominik Hauner — PI, Uni Bonn, Germany

In conjunction with the high luminosity upgrade of the Large Hadron Collider at CERN, the current tracking system of the ATLAS experiment will be replaced by the Inner Tracker (ITk), an all-silicon detector consisting of 5 layers of pixel detectors and 4 layers of strip detectors. More than 8000 modules will be installed in the pixel layers, which together have an active area of approximately 13m² and cover a pseudorapidity of up to 4. In order to build such a large detector in time, the integration of the ITk Pixel modules on their local support structures (so-called longerons or inclined halfrings(IHR)), as well as the quality control of individual loaded local supports will be distributed over many institutes. One of the assembly lines will be setup at the University of Bonn, with technicians from other German locations also helping with cell integration. Due to the serial powering scheme of the ITk Pixel Detector, the quality control of a loaded local support is challenging in several aspects, as the simultaneous operation of multiple modules is necessary for any tests. A large number of different components must hence be integrated into the quality control setup, such as an optical readout system, an interlocks system, industrial power supplies and a scalable DCS. In this talk, the current status of the LLS assembly line in Bonn is presented, and results from the integration of the first inclined half-ring are shown.

Keywords: Pixel; ITk; ATLAS; Cell integration