The first operation of the whole superconducting (SC) linac LISA has been carried out in March 1994. The beam has been accelerated by the four SC cavities to 18 MeV. The macropulse was 1 ms long with a current of 0,5 mA. The FEL activity is now in stand-by, although both the undulator and the optical cavity are installed or ready for installation at LNF, due to the involvement of the group in the TESLA Test Facility program. In this framework LISA will be mainly used as a test machine for SC accelerator studies and for the development of sophisticated diagnostic tools, exploiting the long macropulse and high average current not far from the TTF design parameters. In this paper we review the achievements of LISA which could be of interest to the FEL community since a number of choices in the machine design, namely in the injector, were dictated by the FEL requirements.
M et al. (Sun,) studied this question.