ALICE 3 OT Cooling & Material Budget Estimations

by Lena Kirchner (TUM)

Wednesday 23 Jul 2025, 11:00 → 12:00 Europe/Berlin

5101.EG.024 (Seminar Room)

Zoom Room:

https://cern.zoom.us/j/62412236769?pwd=Dl6UCAc4008Wtx9LDBTSSOrj99FJlA.1
Meeting ID: 624 1223 6769
Passcode: 294336

Abstract:

As part of the ALICE 3 upgrade, a new large-area silicon Outer Tracker (OT) is being developed to extend tracking capabilities at higher collision rates. For this, the design and feasibility of an air-cooled tracking system is explored, with the objective of achieving thermal efficiency while minimizing the material budget.
The study focuses on modular local air-cooling approaches for the three outer barrel layers, which utilize MAPS detector technology requiring stable and uniform thermal conditions. Scaled test setups, ranging from single modules to insulated stave assemblies, were constructed to evaluate thermal performance under realistic power loads. Using dummy PCBs, temperature homogeneity and cooling efficiency were analyzed with several flow configurations.
Additionally, a workflow was developed to estimate the material budget by integrating CAD designs into Geant4. This work contributes to the ongoing optimization of the OT design in preparation for future detector integration and performance studies.