The Upgrade I of LHCb VELO—towards an Intelligent Monitoring Platform

The Large Hadron Collider beauty (LHCb) detector is designed to detect decaysof b- and c- hadrons for the study of CP violation and rare decays. At the endof the LHC Run 2, many of the LHCb measurements remained statisticallydominated. In order to increase the trigger yield for purely hadronic channels,the hardware trigger will be removed, and the detector will be read out at 40MHz. This, in combination with the five-fold increase in luminosity, requiresradical changes to LHCb's electronics, and, in some cases, the replacement ofentire sub-detectors with state-of-the-art detector technologies. The VertexLocator (VELO) surrounding the interaction region is used to reconstruct thecollision points (primary vertices) and decay vertices of long-lived particles(secondary vertices). The upgraded VELO will be composed of 52 modules placedalong the beam axis divided into two retractable halves. The modules will eachbe equipped with 4 silicon hybrid pixel tiles, each read out by 3 VeloPixASICs. The total output data rate anticipated for the whole detector will bearound 1.6 Tbit/s. The highest occupancy ASICs will have pixel hit rates ofapproximately 900 Mhit/s, with the corresponding output data rate of 15 Gbit/s.The LHCb upgrade detector will be the first detector to read out at the fullLHC rate of 40 MHz. The VELO upgrade will utilize the latest detectortechnologies to read out at this rate while maintaining the requiredradiation-hard profile and minimizing the detector material.