Gießen 2024 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Instrumentation IX

HK 39.1: Group Report

Wednesday, March 13, 2024, 15:45–16:15, HBR 19: C 1

Advancements and application of Monolithic Active Pixel Sensors (MAPS) for future tracking detectors using the example of the ALICE ITS3 — •Pascal Becht for the ALICE Germany collaboration — Physikalisches Institut Universität Heidelberg

This talk provides an insight in cutting-edge developments of Monolithic Active Pixel Sensors (MAPS) and the potential for their application in future tracking detectors. Offering mechanical flexibility and a low power consumption in combination with a high detection efficiency and good position resolution, these CMOS pixel sensors pave the way for novel detector concepts. A prominent example is the planned truly cylindrical, bent-silicon tracker (ITS3) for the ALICE experiment in LHC Run 4. Featuring wafer-scale, stitched sensors, the ITS3 pushes the limits in terms of detection performance while dramatically reducing the material budget.

Starting from the basic detector concepts, via the characterisation of small-scale pixel sensor prototypes produced in 65 nm CMOS technology node, to first results of large-area (1.4 cm x 26 cm) stitched sensors, milestones of the ITS3 development are presented. Here, the focus will be on the radiation hardness and the power consumption of the prototypes as well as in-beam characterisation of wafer-scale sensors. Furthermore, a perspective for MAPS being used for material budget imaging or the measurement of the proton interaction cross section is given.

Keywords: MAPS; Vertex detectors; ALICE; Pixel sensors; Silicon CMOS sensors