SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Instrumentation X

HK 34.2: Vortrag

Mittwoch, 22. März 2023, 16:15–16:30, SCH/A251

Characterization of APTS, a MAPS prototype fabricated in 65 nm CMOS technology for the ALICE ITS3 upgrade — •David Schledewitz for the ALICE Germany collaboration — Physikalisches Institut, Universität Heidelberg — GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — European Organization for Nuclear Research (CERN), Geneva, Switzerland

For the next detector upgrade of the ALICE experiment, an extensive R&D program is carried out for the vertex detector to minimize the material budget and reduce the distance to the interaction point. From the currently installed ALICE Inner Tracking System (ITS2), the innermost three out of the seven layers of Monolithic Active Pixel sensors (MAPS) will be replaced. The proposed upgrade (ITS3) is based on curved, wafer-scale, ultra-thin silicon MAPS with a truly cylindrical geometry. The foreseen technology for this upgrade is the 65 nm CMOS imaging process by TowerJazz Panasonic Semiconductor Company, allowing the production of wafer-scale pixel sensors on 300 mm diameter wafers using stitching.

One of the current prototypes to evaluate the detection performance and radiation hardness of the technology is the Analog Pixel Test Structure (APTS). In particular, a set of 4 x 4 pixel matrices with parallel, analog readout realized in various geometries are used to characterize the parameter space of the technology. This contribution intends to provide an overview of the APTS, covering performance results from testbeam campaigns and laboratory measurements.