This review is focused on free-electron lasers (FELs) in the hard to soft x-ray regime. The
aim is to provide newcomers to the area with insights into: the basic physics of FELs, the …

Electron beam quality is paramount for X-ray pulse production in free-electron-lasers (FELs).
State-of-the-art linear accelerators (linacs) can deliver multi-GeV electron beams with …

The detailed structure of superradiant pulses generated from a free-electron laser (FEL)
oscillator was experimentally revealed for the first time. Owing to the phase retrieval with a …

High-gain free-electron lasers, conceived in the 1980s, are nowadays the only bright
sources of coherent X-ray radiation available. In this article, we review the theory developed …

This report describes the conceptual design of a proposed free electron laser test facility
called CLARA that will be a major upgrade to the existing VELA accelerator test facility at …

Plasma accelerators can generate ultra-high-brightness electron beams that open the door
to light sources with a smaller physical footprint and properties un-achievable with …

Laser-driven plasma accelerators can generate accelerating gradients three orders of
magnitude larger than radio-frequency accelerators and have achieved beam energies …

Free-electron lasers (FELs) have been built ranging in wavelength from long-wavelength
oscillators using partial wave guiding through ultraviolet through hard x-ray that are either …

SIMPLEX is a computer program developed for simulating the amplification process of free-
electron lasers (FELs). It numerically solves the so-called FEL equations describing the …

In this paper we present a novel approach to free electron laser (FEL) simulations based on
the decomposition of the electromagnetic field in a finite number of radiation modes. The …