SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 52: Invited Topical Talks II-A

T 52.2: Eingeladener Vortrag

Mittwoch, 22. März 2023, 14:20–14:40, HSZ/AUDI

Alignment of the CMS Tracker: Automation is Key — •Marius Teroerde — 1. Physikalisches Institut B, RWTH Aachen, Germany

The inner tracker is the central part of the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). In order to ensure excellent physics performance, it is necessary to have precise knowledge of the tracker geometry, so that tracks and vertices can be accurately reconstructed.

The measurement of the tracker geometry using particle tracks, called ’alignment’, is a very complex task. It involves tracking the time dependent position of about 15000 detector modules. Radiation damage to the modules influences the position measurements. The best data quality is therefore achieved if the tracker geometry is frequently updated based on recent data and if the granularity of the alignment is fine enough to account for biases in individual modules. An automated procedure, including automated quality control, is key to meet these requirements. In this talk, an introduction to tracker alignment strategies at CMS is given and recent developments of automatic alignment are discussed. Future prospects for the era of the High-Luminosity LHC are also touched upon.