title: Commissioning, Calibration & Early Performance of the LHCb Scintillating Fibre Tracker
creator: Witola, Lukas
subject: ddc-530
subject: 530 Physics
description: The LHCb detector has undergone a major upgrade for Run 3 of the LHC enabling it to operate at a five times higher instantaneous luminosity and to read out the entire detector at a frequency of 40 MHz, corresponding to the bunch crossing frequency of the LHC. The main tracking stations of the spectrometer were replaced by the Scintillating Fibre (SciFi) Tracker, a large, high granular tracking detector based on 250 μm scintillating fibres readout by arrays of silicon photomultipliers (SiPMs). The SiPM signals are processed and digitised by a custom ASIC at 40 MHz. Further digital electronics perform clustering and data compression before sending the data via optical links to the data acquisition system.  This thesis describes the LHCb SciFi Tracker and the commissioning of its front-end electronic. It highlights the calibration of the frontend ASICs’ detection thresholds, a crucial task to ensure the detector’s optimal performance. It is shown that, following the calibration of the detection thresholds, the detector achieves a hit detection efficiency of 99 % and a single hit resolution of <100 μm while maintaining a sufficiently low noise rate.
date: 2024
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/35222/1/Dissertation_Witola.pdf
identifier: DOI:10.11588/heidok.00035222
identifier: urn:nbn:de:bsz:16-heidok-352220
identifier:   Witola, Lukas  (2024) Commissioning, Calibration & Early Performance of the LHCb Scintillating Fibre Tracker.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/35222/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng