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T: Fachverband Teilchenphysik
T 9: Silicon Detectors I
T 9.2: Vortrag
Montag, 16. März 2026, 16:30–16:45, KH 01.012
Noise Analysis in the MuPix11 Sensor for the Mu3e Experiment — •Antonios Kontopoulos, Heiko Augustin, and Andre Schöning for the Mu3e collaboration — Physikalisches Institut Heidelberg
The Mu3e experiment searches for the charged-lepton-flavour-violating decay µ+ e+ e− e+ with an ultimate single-event sensitivity on the BR of 10−16, imposing stringent requirements on the noise performance of its ultra-low-mass vertex detector. The MuPix11, a high-voltage monolithic active pixel sensor (HV-MAPS), has been observed to exhibit spatially fixed noise features, necessitating a detailed characterisation of its noise behaviour.
In this contribution, a systematic noise study of MuPix11 is presented, based on cosmic data from the Mu3e vertex detector and quad-module measurements conducted at the Physics Institute in Heidelberg and the Paul Scherrer Institute. Noise characterisation is performed using a frequency-domain analysis to identify spectral features and coherent noise sources. A dedicated reconstruction framework is used to extract per-pixel noise rates, temporal correlations, and spatial noise maps.
First results reveal the dominant noise contributions under varying operating conditions and demonstrate the suitability of the developed methods for supporting sensor optimisation and the qualification of MuPix11 for integration into the Mu3e detector.
Keywords: MuPix11; Mu3e; HV-MAPS; Noise Characterization; Monolithic devices