The LHCb SciFi Tracker

Abstract

The LHCb Experiment completed its first major upgrade and is running for LHC Run 3 and beyond, improving on many world-best physics measurements. Some of the LHCb sub-detectors and the experiment read-out system have been re-designed, raising the experiment's luminosity data acquisition limits and - consequently - expanding its statistical accumulation rates. To cope with upgrade requirements, a new tracker based on scintillating fibers (SciFi) was designed and implemented, replacing the previous Outer and Inner trackers. SciFi sub-detector delivers improved spatial resolution tracking information to LHCb for its new trigger-less era, with a readout capable of reading ~524k channels at 40MHz full rate. Automated calibration routines for SciFi detector devices, based on dedicated software tools and operational procedures, were validated during SciFi commissioning and have been applied to further improve the detector performance since the beginning of Run 3. The oral presentation at ICHEP2024 briefly described the SciFi Tracker, demonstrated the experience gained on SciFi operations during data taking, and presented early results showing the detector performance after commissioning.