Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 27: Silicon Detectors III (ATLAS + CMS production)

T 27.4: Vortrag

Dienstag, 1. April 2025, 17:00–17:15, VG 0.111

From Kick-Off to Production - Aachen as an Assembly Center for the CMS Phase-2 Outer Tracker Upgrade — Max Beckers¹, Clara Ebisch², Lutz Feld², Nina Höflich¹, Katja Klein², Martin Lipinski², Daniel Louis², •Vanessa Oppenländer², Alexander Pauls², Oliver Pooth¹, Nicolas Röwert², Jan Terörde², Lennart Wilde¹, Michael Wlochal², and Wioletta Wyszkowska¹ — ¹3. Physikalisches Institut B, RWTH Aachen — ²1. Physikalisches Institut B, RWTH Aachen

The new operating conditions of the future HL-LHC require a replacement of the complete silicon tracking system of the CMS experiment as part of the CMS Phase-2 Upgrade. For the Phase-2 Outer Tracker new so-called 2S modules have been developed that consist of two silicon sensors stacked on top of each other. By correlating the measured hits of both sensors, this module design enables the inclusion of tracking information in the Level-1 trigger at CMS for the first time. The production of 2S modules requires a careful and precise assembly. Within the CMS Collaboration the 2S module assembly is distributed over several institutes across the US, Europe and Asia. The RWTH Aachen University represents one of those assembly centers with a contribution of around 1000 2S modules. In the last two years the project went through several stages which include a so-called kick-off batch, a pre-series and is now ramping up from pre-production to production. In this talk important results from the different stages will be presented as well as the qualification steps that have been carried out showing that the Assembly Center in Aachen is well prepared for production.

Keywords: Silicon; 2S Module; CMS