ELECTRON BEAM SIMULATIONS FOR THE FERMI PROJECT AT ELETTRA

FERMI at ELETTRA is a project aiming at the construction of a single-pass user facility for the spectral range from 100 nm to 10 nm. Starting point is the existing 1.2 GeV, 3 Ghz linac. Downstream of the linac two undulator beamlines will serve the wavelength range from 100 nm to 40 nm and from 40 nm to 10 nm, respectively. The former beamline will be based on a single-stage High Gain Harmonics Generation (HGHG) scheme, while for the latter a double stage HGHG scheme is foreseen. In this paper we present the results of both numerical and analytical studies aimed to optimize the electron beam characteristics for the 100-40 nm HGHG. In particular, care has been taken to include realistic models for the injector.