RICH2019: a proposal for the LHCb-RICH upgrade

A proposal for a two-RICH system upgrade for 2019 is presented. The proposal relies on the experience gained in running the current RICHes. We apply small changes to the layout of RICH1, in order to reduce the expected occupancies to acceptable values and improve performance at high luminosities, while retaining the current RICH2 layout. As such, the proposed upgrade appears to be a well-known, safe and robust option. Regardless of the chosen option and in addition to the change of the layout, the current HPDs will have to be replaced with a new photon detector. At present the baseline choice is the Multi anode Photon Multiplier Tube. The proposed layout, while still requiring optimization and fine-tuning, already shows satisfactory physics performances, which we expect to further improve as the optics performance is demonstrated to be superior to the current layout. it is shown that the proposed new RICH1 can fit into the current infrastructure with minimal engineering work.