Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 19: Methods in particle physics 2 (alignment, luminosity)
T 19.1: Vortrag
Montag, 4. März 2024, 16:00–16:15, Geb. 30.41: HS 1
Track-Based alignment for the SciFi detector at the LHCb experiment — •Miguel Ruiz Díaz1, Giulia Tuci1, Nils Breer2, and Biljana Mitreska2 — 1Physikalisches Institut, Universität Heidelberg — 2Technische Universität Dortmund
A precise knowledge of the position and orientation of the different sub-detectors is crucial for the operation of any particle physics experiment. The LHCb detector has undergone a major upgrade for Run 3, and the alignment of its sub-detectors has played a central role in its commissioning.
A central part of the LHCb upgrade is the installation of a Scintillating Fiber (SciFi) detector featuring three layers of tracking stations downstream of the magnet. An accurate alignment of the SciFi tracker is essential to achieve the best possible charged particle momentum resolution and tracking efficiency, impacting most of the measurements conducted at the LHCb experiment.
This talk presents the application of track-based alignment techniques to compute the position and orientation of the SciFi detector. Results from the Run 3 commissioning period are presented, showing the impact of the SciFi alignment on track residuals and mass distributions. The alignment of the SciFi detector will be monitored in real-time during the data-taking period. The alignment constants -rotations and translations of the SciFi components- will be automatically updated if the change in their values exceeds certain thresholds. These thresholds have been evaluated in a precision study employing Monte Carlo simulated data. The results of the study are discussed.
Keywords: LHCb; Alignment; SciFi; Tracking