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T: Fachverband Teilchenphysik
T 9: Silicon Detectors I
T 9.6: Talk
Monday, March 16, 2026, 17:30–17:45, KH 01.012
Mechanical, Thermal, and Electrical Design of the P2 Tracking Detector Modules — •Lucas Sebastian Binn for the P2 collaboration — Institute of Nuclear Physics, Johannes Gutenberg-University Mainz, Germany
The P2 Experiment at the new Mainz Energy-Recovering Superconducting Accelerator (MESA), which is currently under construction in Mainz, will measure the weak mixing angle sin2θW in elastic electron-proton scattering at low momentum transfer with unprecedented precision.
A key parameter for the analysis, the momentum transfer Q2, and systematic effects, are measured by a low-mass tracking detector consisting of 4 identical modules arranged in two layers. Each module consists of two sensor planes, with silicon pixel sensors glued and wire-bonded on rigid-flex ladders, which are tensioned individually using a spring-loaded mechanism. A laminar flow of cool helium gas across the ladders provides the needed cooling of around 650 W per module. The sensors are read out using a radiation-hard ASIC (lpGBT) developed by CERN.
The mechanical, thermal, and electrical designs have been developed and are currently undergoing testing. For this purpose, dedicated prototypes and test stands for each area have been constructed.
This talk gives an overview of the P2 experiment tracking detector module design, covering the mechanical, thermal, and electrical aspects.
Keywords: P2 Experiment; Tracking Detector; Modules; Cooling; HV-MAPS