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Yield and performance validation of the Monolithic Stitched Sensor (MOSS), the first wafer-scale prototype for the ALICE ITS3 upgrade

The ALICE Inner Tracking System upgrade (ITS3) will employ stitched, wafer-scale Monolithic Active Pixel Sensors (MAPS) for the first time in high-energy physics, achieving a material budget of only 0.09 %X 0 per layer. Its first stitched prototype, the Monolithic Stitched Sensor (MOSS), underwent s...

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Bibliographic Details
Main Author: Menzel, Marius (Author)
Format: Article (Journal)
Language:English
Published: 2026
In: Journal of Instrumentation
Year: 2026, Volume: 21, Issue: 03, Pages: 1-6
ISSN:1748-0221
DOI:10.1088/1748-0221/21/03/C03027
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1088/1748-0221/21/03/C03027
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Author Notes:M.W. Menzel, on behalf of the ALICE collaboration
Description
Summary:The ALICE Inner Tracking System upgrade (ITS3) will employ stitched, wafer-scale Monolithic Active Pixel Sensors (MAPS) for the first time in high-energy physics, achieving a material budget of only 0.09 %X 0 per layer. Its first stitched prototype, the Monolithic Stitched Sensor (MOSS), underwent serial testing confirming sensor yield compliance with ITS3 requirements. In-beam tests show the device meets the ITS3 efficiency requirement of > 99% while maintaining a fake-hit rate below 0.1 hits/pixel/s, with performance sustained up to irradiation levels of 4 kGy and 4 × 1012 1 MeV neq cm-2. The sensor demonstrates excellent charge-collection properties and linearity between time-over-threshold and deposited energy in the 1.8 keV to 6.5 keV range in response to soft X-ray emissions. This article provides an overview of the validation steps and characterisation results.
Item Description:Online veröffentlicht: 18. März 2026
Gesehen am 16.06.2026
Topical Workshop on Electronics for Particle Physics, Rethymno, Crete, Greece, 6-10 October 2025
Physical Description:Online Resource
ISSN:1748-0221
DOI:10.1088/1748-0221/21/03/C03027

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