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T: Fachverband Teilchenphysik

T 85: Silicon Strip Detectors II

T 85.8: Vortrag

Donnerstag, 18. März 2021, 17:45–18:00, Tj

Loading and testing of strip silicon modules for the ATLAS ITk upgrade phase2 — •Alessia Renardi, Sergio Diez Cornell, and Ruchi Gupta — DESY, Hamburg, Germany

The upgrade of the central tracking system of the ATLAS experiment is required for the operation at the High Luminosity LHC (HL-LHC) starting in the middle of 2027. It needs to be completely replaced for the Phase II upgrade due to increased radiation environment, detector occupancy and trigger rate, as well as aging and radiation damage of the existing inner detector. The most basic unit, a module, of the new Inner Tracker (ITk) strip detector consists of a single silicon sensor, one or two flex hybrid circuit boards where the read-out chips are located, and a power-board. For the ATLAS ITk strip End-cap six flavors of modules have been designed, different in shape and structure. All of them are glued on both sides of a low-mass carbon-fibre support structures with embedded CO2 cooling, so-called petal core. A semi-electrical petal was built at DESY-Hamburg: semi-electrical modules have been produced in different institutes of the ITk strip collaboration and glued on a petal core using an automatized procedure. The glue is dispensed on the local support structure and the pattern was investigated in order to aim for a good glue coverage as well as the required thickness and sensor flatness. The whole procedure will be shown explaining how the robot is able to pick and place every single module and glue it on the petal core. The talk includes the results of the electrical quality control test too.