Analysis of the performance of the MONOLITH prototype

In the framework of the study for a large magnetic detector suitable for the physics at a neutrino factory, the data collected with the MONOLITH prototype at the T7-PS facility at CERN has been analyzed. The hadron shower angular resolution for pions followed a 10.4/ root E(GeV) + 10.1/E law for orthogonally incident particles. For a baseline of 732 km, this performance would allow the rejection of wrong sign muon background at the level of 10**-**6, and a capability to measure sintheta//1//3 down to 10**-**3. A preliminary analysis of about 10**6 downward going muons collected at LNGS is also presented. The readout system upgrade allowed the monitoring of each glass RPC with a granularity of 1 cm**2.