SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 149: Detector Systems / Muon
T 149.1: Vortrag
Donnerstag, 23. März 2023, 17:30–17:45, WIL/C133
The commissioning of the new SciFi tracking detector for LHCb — Johannes Heuel and •Jan-Marc Basels — I. Physikalisches Institut B, RWTH Aachen University
The LHCb Upgrade I detector at the Large Hadron Collider (LHC) at CERN includes a new and unique scintillating fibre tracker (SciFi) with a silicon photo-multiplier (SiPM) readout system. The SciFi tracker is organised in 12 detector planes. Each, with an area of 30 m2 and a radiation length of only 1 %, provides spatial measurements with a resolution of 0.07 mm and an efficiency of more than 98 %.
A real-time and offline monitoring system enables the optimisation of the detector performance and early detection of potential issues during operation. The signal detection efficiency is dominated by the time-alignments and the definition of the signal thresholds for the 4096 SiPM arrays, each with 128 channels. For long term operation, the expected degradation of the performance of the SiPMs due to radiation damages is of particular importance.
The detector assembly has been completed in 2022 and its commissioning is still ongoing. We present the status of the commissioning work.