The LHCb RICH Detector Upgrade

LHCb is one of the four main experiments at the Large Hadron Collider (LHC) at CERN, focused on the study of CP violation and rare decays of b and c quarks. The Ring-Imaging Cherenkov (RICH) system is a crucial component of the LHCb experiment providing identification of charged particles over a large momentum range (2-100 GeV/c) and angular acceptance (15-300 mrad). The LHCb RICH performed well during Run 1 and the current Run2. LHCb will upgrade many of its detector systems during the second LHC long shutdown (2019-2020) in order to sustain a five-fold increase in instantaneous luminosity up to 2$\times$10$^{33}$ cm$^{-2}$s$^{-1}$. In order to increase the readout rate of the entire detector from the current 1MHz to 40MHz, a substantial change in the LHCb trigger and readout schemes will be implemented.The RICH detectors will be upgraded by installing new photodetectors, electronics and modified optics and mechanics. The status of the RICH upgrade program will be reviewed, including tests of the complete photo-electronic chain in the lab and in charged-particle beams.