Performances of the OPERA RPCs

Abstract OPERA is a dedicated experiment for the observation of ν μ into ν τ oscillations through τ appearance using a 730 km long baseline ν μ beam from CERN to the Gran Sasso underground laboratory. The detector is equipped with two spectrometers for muon identification and charm background rejection. Bakelite RPCs are used as inner trackers inside the iron magnet of the spectrometers. The experiment has already performed two short runs in 2006 and 2007. Results about the RPC performances are presented.