Detector Seminar - The Scintillating Fibre Tracker for LHCb Upgrade 1 and 2

LHCb has undergone a major upgrade during the LHC long shutdown 2 to cope with increased instantaneous luminosities and to implement a trigger-less 40 MHz readout. The current inner and outer tracking detectors have been replaced by a single homogeneous detector based on plastic scintillating fibres (SciFi). The SciFi tracker covers an area of 340 m2 by using more than 10,000 km of scintillating fibre with 250 μm diameter, enabling a spatial resolution of better than 100μm for charged particles. Linear arrays of Silicon Photomultipliers cooled to −40°C are placed at the fibre ends. The readout of 524 k channels occurs through custom-designed front-end electronics. The detector has been commisioned and is currently operating at Point 8.
This talk will cover the design, commissioning, and challenges of the Scintillating Fibre Tracker at LHCb, and provide a short overview of the second upgrade being planned for Long Shutdown 4 at the LHC after 2032.