EXPECTED PERFORMANCE OF FELINA, THE DUTCH VUV-FEL IN AMSTERDAM

The FOM Institute for Nuclear Physics (NIKHEF-K) in Amsterdam currentl y operates the pulse-stretcher and storage ring AmPS as a continuous e lectron beam source for nuclear physics experiments up to 900 MeV. Her e we review the feasibility to use AmPS as a driver for FELINA (Free-E lectron Laser IN Amsterdam) for the generation of narrow bandwidth rad iation in the (vacuum) ultra-violet spectral range in a two-stage proj ect. For the first stage we consider a relatively low-cost demonstrati on experiment in the UV, i.e,, lambda greater than or equal to 200 nm, where FEL experiments will be performed in parallel with the nuclear physics research program. Lasing in the VUV requires significant modif ications to the ring in order to enhance the gain. From preliminary ca lculations it can be deduced that lasing down to wavelengths less than 100 nm is then possible.