SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 24: Instrumentation VII
HK 24.1: Gruppenbericht
Mittwoch, 22. März 2023, 14:00–14:30, SCH/A251
Advances in CMOS MAPS for the next generation of collider detectors — •Bogdan-Mihail Blidaru for the ALICE Germany collaboration — Heidelberg University, Germany
CMOS Monolithic Active Pixel Sensors (MAPS) are continuously proven to comply with the severe constraints set by present and future collider detectors which require high granularity, low mass, excellent spatial resolution, as well as moderate radiation hardness and timing. Moreover, their ease of integration and cost effectiveness for large areas makes them alluring for almost all particle detection applications.
The first large scale MAPS-based silicon tracker is the new 10 m2 ALICE Inner Tracking System (ITS2). Results from its first in-beam operation at the LHC confirm the excellent performance of the single ALPIDE MAPS chips that span its surface.
To profit from the advances in the field of CMOS technology, the ITS collaboration is pioneering the usage of bent, wafer-scale pixel sensors for the replacement of the innermost tracking layers of ITS2 in the next upgrades. This roadmap is accompanied by a change in the technology node from 180 nm (ALPIDE) to 65 nm which allows the stitching of sensors and paves the path to an almost massless detector.
This contribution will give an overview of some of the ongoing developments in the field of CMOS MAPS, specifically the research done in the context of the ALICE collaboration for its future upgrades. Performance of bent sensors, 65 nm test structures and progress towards wafer-scale sensors, as well as the motivation of building such devices from a physics and detector performance point of view will be reviewed.