The FEL Project in the Frascati INFN Laboratories with the linear SC Accelerator Lisa

A program to construct a test superconducting electron linear accelerator (LISA) is in progress at Frascati INFN National Laboratories. The electron beam will be used to realize an FEL in the infrared region (11-18 /spl mu/m) in collaboration with a group of ENEA-CRE Frascati. The electron beam parameters and their relation to the expected performances of the FEL are discussed. Some future developments - energy recovery, energy doubling - are briefly presented.