Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 12: Silicon Detectors II
T 12.5: Talk
Monday, March 16, 2026, 17:15–17:30, KH 01.022
2S module assembly in Aachen for the CMS Phase-2 Outer Tracker upgrade — Max Beckers2, Clara Ebisch1, Lutz Feld1, •Nina Höflich2, Katja Klein1, Martin Lipinski1, Daniel Louis1, Oliver Pooth2, Vanessa Oppenländer1, Joëlle Savelberg1, Michael Wlochal1, and Wioletta Wyszkowska2 — 1I. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen — 2III. Physikalisches Institut B, RWTH Aachen University, D-52056 Aachen
In the context of the CMS Phase-2 upgrade, the complete Outer Tracker of the CMS detector will be replaced. The new Outer Tracker will contain two types of modules, 2S modules consisting of two silicon strip sensors and PS modules made from a silicon macro-pixel and a silicon strip sensor. In total, around 7600 2S and 6000 PS modules will be built and installed in the new outer tracker. These modules are currently under assembly in multiple assembly centers worldwide.
At the Physics Institutes IB and IIIB at RWTH Aachen University, approximately 1000 2S modules will be assembled, with over 100 already completed. The module assembly consists of multiple gluing and wirebonding steps, which have to be performed with high precision. The assembly is accompanied by various QC measurements, especially module readout and sensor-sensor alignment tests, to ensure consistent module quality.
In this talk, the 2S module assembly at RWTH Aachen will be presented, including the current status and details on the different assembly steps.
Keywords: CMS Phase-2 Outer Tracker upgrade; Silicon strip detectors; 2S modules