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Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 112: Silicon trackers 5

T 112.4: Vortrag

Freitag, 8. März 2024, 09:45–10:00, Geb. 30.22: kl. HS A

Quality Control for MuPix11 for the Mu3e Pixel Detector — •Anna Lelia Fuchs for the Mu3e collaboration — Physikalisches Institut Universität Heidelberg

The Mu3e experiment will search for the charged lepton flavour violating µ+e+ e e+ decay with an unprecedented single event sensitivity of 2 · 10−15 in phase I. To achieve the necessary precision in the spatial and timing resolutions, the Mu3e experiment will feature the first tracking detector composed solely of ultra-thin High-Voltage Monolithic Active Pixel Sensors (HV-MAPS). HV-MAPS integrate readout electronics on the same sensor as the active detector volume, which allows the thinning of wafers to a minimum of 50 µm. The Mu3e detector will be composed of MuPix11 HV-MAPS at thicknesses of 50 µm and 70 µm. A quality control procedure is necessary to ensure the functionality of each sensor before its installation.
This talk will outline the quality control procedure developed for the MuPix11 sensors in the context of pre-production for the Mu3e vertex detector. The quality control evaluates key functions such as HV biasing, powering, global configuration and data readout. First tests were carried out on both 50 µm and 70 µm MuPix11 sensors, and the acquired information used to further develop the quality control procedure. This talk will present the quality control yield and failure profiles for both sensor thicknesses.

Keywords: HV-MAPS; HV-CMOS; Mu3e; Quality Control

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