The fundamental coherent radiation emission processes from a bunched charged particles
beam are outlined. In contrast to spontaneous emission of radiation from a random electron …

The electrodynamics of active continuous media is applied to theoretically examine
collective spontaneous emission regimes of dipole oscillator ensembles. Recent …

Intense attosecond X-ray pulses are key for ultrafast nonlinear spectroscopy and diffractive
imaging. Here we demonstrate the generation of terawatt-scale isolated attosecond pulses …

We study the time structure, the frequency composition, and the shot to shot fluctuations of
the radiation emitted by a free-electron laser starting from shot noise in the electron beam …

The pulse duration, and, more generally, the temporal intensity profile of free-electron laser
(FEL) pulses, is of utmost importance for exploring the new perspectives offered by FELs; it …

Free-electron lasers producing ultrashort pulses with high peak power promise to extend
ultrafast non-linear spectroscopic techniques into the extreme-ultraviolet–X-ray regime. Key …

The SwissFEL soft X-ray free-electron laser (FEL) beamline Athos will be ready for user
operation in 2021. Its design includes a novel layout of alternating magnetic chicanes and …

Plasma waves excited by intense laser beams can be harnessed to produce femtosecond
duration bunches of electrons with relativistic energies. The very large electrostatic forces of …

Theoretical investigation of a short electron beam (extended bunch) interaction with a
backward wave propagating in a slow wave structure demonstrates the possibility of …

X-ray free-electron lasers (XFELs) are cutting-edge research tools that produce almost fully
coherent radiation with high power and short-pulse length with applications in multiple …