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T: Fachverband Teilchenphysik

T 89: Pixel Detectors IV

T 89.2: Vortrag

Donnerstag, 18. März 2021, 16:15–16:30, Tn

Qualification of the Hybridization Process for the ATLAS ITk Module Production — •Michael Daas, Tomasz Hemperek, Florian Hinterkeuser, Fabian Hügging, Hans Krüger, David-Leon Pohl, Lars Schall, Mark Standke, Marco Vogt, Norbert Wermes, and Jochen Dingfelder — Physikalisches Institut der Universität Bonn

The Large Hadron Collider (LHC) at CERN will be upgraded for higher luminosities in 2025. The increased luminosity poses new demanding requirements for its detectors. Alongside the accelerator, the ATLAS experiment and all its subdetectors will be upgraded as well.

This talk gives an overview of the qualification process for the hybridization of the pixel detector modules for the upgraded ATLAS Inner Tracker (ITk). This part of the ITk preproduction program is based on the RD53A readout ASIC prototype, developed by the RD53 collaboration.

In the scope of the Hybridization Market Survey (MS), hybrid double chip modules consisting of two RD53A readout chips interconnected with a single, larger sensor tile via high-density, fine-pitch bump bonding have been produced by several vendors. A comprehensive measurement program, consisting of physical and electrical tests, measurements with radioactive sources, as well as thermal stress testing has been conducted in order to assess the quality of the different hybridization processes and vendors. Finally, recommendations for the suitability of all examined vendor combinations have been put forward.