Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 26: Methods in Particle Physics II
T 26.3: Talk
Tuesday, March 17, 2026, 16:45–17:00, KH 00.020
Position monitoring system for the LHCb Upgrade II downstream tracker — •Todor Todorov1, Marco Gersabeck1, Flo Reiß1, and Pascal Sainvitu2 — 1Albert-Ludwigs-Universität Freiburg — 2CERN
The LHCb Upgrade 2 has the ambitious goal of increasing the instantaneous luminosity in the detector by a factor of 5. Due to the increase in detector occupancy and pileup, upgrades of many detector systems will be required, including the tracker. A new hybrid tracker will be installed downstream from the magnet, the Mighty Tracker, that will consist of silicon pixel sensors in the most occupied regions near the beam pipe and improved scintillating fibres in the remaining areas. The detector alignment and physics results will benefit from a real-time position monitoring system, but any such system will have to adhere to the strict material budget and space constraints. Frequency sweeping interferometry is chosen as a technique capable of fulfilling all requirements. A study on its use for effective position monitoring in the Mighty Tracker is presented.
Keywords: LHCb; Upgrade 2; Alignment