Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 12: Silicon Detectors II

T 12.6: Talk

Monday, March 16, 2026, 17:30–17:45, KH 01.022

2S module assembly progress and module test results for the CMS Phase-2 Tracker Upgrade — •Max Beckers², Lutz Feld¹, Nina Höflich², Katja Klein¹, Martin Lipinski¹, Vanessa Oppenländer¹, Oliver Pooth², and Joëlle Savelberg¹ — ¹I. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen — ²III. Physikalisches Institut B, RWTH Aachen University

For the CMS Phase-2 Outer Tracker upgrade, new silicon strip detector modules consisting of two silicon strip sensors, so-called 2S modules, are developed and produced. This process is distributed along multiple assembly centers worldwide.

RWTH Aachen University will build around 1000 2S modules. After each assembly step different QC measurements and tests are performed. Different kinds of specifications needs to be respected. The assembled modules are then shipped to DESY, where they are thermally cycled in the "Burn-in" setup. In addition, a multi module cold box is available in Aachen to perform thermal cycles for up to 4 modules.

With over 100 modules built in Aachen and shipped to DESY the assembly process is currently ongoing. As more and more modules become available, the QC and test results are continuously monitored and can be evaluated in relation to the overall statistical. These results can be used to implement a module grading concept.

This talk presents the current assembly progress of 2S modules at Aachen together with results from QC measurements, module tests and thermal cycling.