Expected performance of FELINA, the Dutch VUV-FEL in Amsterdam

The FOM Institute for Nuclear Physics (NIKHEF-K) in Amsterdam currently operates the pulse-stretcher and storage ring AmPS as a continuous electron beam source for nuclear physics experiments up to 900 MeV. Here we review the feasibility to use AmPS as a driver for FELINA (Free-Electron Laser IN Amsterdam) for the generation of narrow bandwidth radiation in the (vacuum) ultra-violet spectral range in a two-stage project. For the first stage we consider a relatively low-cost demonstration experiment in the UV, i.e., λ ≥ 200 nm, where FEL experiments will be performed in parallel with the nuclear physics research program. Lasing in the VUV requires significant modifications to the ring in order to enhance the gain. From preliminary calculations it can be deduced that lasing down to wavelengths less than 100 nm is then possible.