Results from background reduction in the DELPHI Forward RICH

The forward ring imaging Cherenkov detector of DELPHI covers the forward region between 15° < θ < 35° and 145° < θ < 165°. The full detector was operated during the 1994 LEP run period. The background reduction algorithms applied to the 1994 data are presented. The observed Cherenkov angle distributions for tracks with saturated angles are used to evaluate the performance of the algorithms. Results are given for dimuon and hadronic events.