FERMI is the new seeded free electron laser (FEL) facility in operation next to the third-generation synchrotron radiation facility Elettra. Unique among the FEL sources currently operating in the ultraviolet and soft x-ray range worldwide, FERMI has been developed to provide fully coherent ultrashort (10-100 femtosecond) pulses with a peak brightness ten billion times higher than that made available by third-generation light sources. FERMI is opening unique opportunities for exploring the structure and transient states of condensed matter, soft matter and low-density matter using a variety of diffraction, scattering and spectroscopy techniques.

Photon source

A linear accelerator is used to generate a relativistic electron beam that can be injected into each of two separate FEL lines, configured as single- and double-harmonic-cascade setups, respectively. An external laser is used to seed each of these lines.

Photon diagnostics and Beamlines

After the undulators the photon beam travels through a diagnostics section and the beamlines to reach the endstations.


Machine status

Current status of the machine (electron and photon beam).

Beam parameters

Electron and photon parameters of FERMI FEL achieved To Date.


People and areas of the FERMI@Elettra project.

Call for users

The fourth call for external users will open in Autumn 2014 both on FEL-1 and FEL-2.

Last Updated on Tuesday, 08 July 2014 11:19