Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Instrumentation XI

HK 51.1: Group Report

Thursday, March 13, 2025, 15:45–16:15, SR Exp1A Chemie

The Outer Tracker Barrel of ALICE3 — •Laszlo Varga for the ALICE Germany collaboration — Technische Universitaet Muenchen, Munich, Germany

The large area Outer Tracker (OT) of ALICE3 will be fully based on Monolithic Active Pixel Sensor technology. Its four barrel layers follow a cylindrical geometry, with a support structure segmented into independent staves populated by interconnected detector modules. The whole concept, the layout of a stave and the implementation of the infrastructure is based on the cooling of the detectors.

We will discuss the different cooling options and the corresponding mechanical implementations and compare them to simulations carried out using the COMSOL Multiphysics finite element tool. In parallel the prototype development has already started and we will present detailed measurements on the heat dissipation, mechanical precision and flow induced vibrations, which will significantly influence the performance of a system designed for high precision tracking on the micrometer scale.

This research was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy-EXC-2094-390783311 and Bundesministerium für Bildung und Forschung, BMBF-05P24WO4 ALICE.

Keywords: ALICE3; Outer Tracker; cooling; mechanics