Test results on heavily irradiated silicon detectors for the CMS experiment at LHC

The R&D of silicon micro-strip detectors for CMS able to survive a radiation environment with fluxes above 10/sup 14/ particles per cm/sup 2/ has started since few years. Micro-strip detectors have been studied before and after irradiation performed with different sources and doses. The analysis of the experimental data helps to optimise the design of detectors which can be operated efficiently during LHC lifetime.