Ring-imaging Cherenkov detectors for LHC-B

The particle identification system proposed for the LHC-B experiment is presented. It consists of ring-imaging Cherenkov detectors with three radiator materials, including the novel use of aerogel in an imaging detector. High performance photodetectors are under development, utilizing multipixel hybrid photodiodes. Significant πK separation will be possible for isolated tracks with momenta between 1 and 150 GeV/c. The first studies of pattern recognition in regions of high track density are described.