X-ray free-electron lasers (FELs) are state-of-the-art scientific tools capable to study matter
on the scale of atomic processes. Since the initial operation of X-ray FELs more than a …

The compact linear accelerator for research and applications (CLARA) is a 250 MeV
ultrabright electron beam test facility at STFC Daresbury Laboratory. A user beamline has …

We demonstrate the generation of widely tunable two-color x-ray free-electron laser (FEL)
pulses at SwissFEL. In a split-undulator configuration, each color is produced in a different …

We demonstrate the generation of coherent soft x-ray free-electron laser (FEL) pulses with a
duration below 1 fs using nonlinear compression with a low-charge electron beam (10 pC) …

We present analytical and numerical studies of short-range wakefields in an L-shaped
corrugated structure. This structure has variable streaking polarization and the quadrupole …

Plasma and beam physics are usually considered as classical physics disciplines with
quantum effects featuring only rarely. In particular, free electron lasers (FELs) even in the …

Stable propagation of high charge electron bunches through long, tens of meters, dielectric
lined waveguides is critical for practical realisations of future dielectric wakefield …

Time-resolved diagnostics are fundamental for x-ray free-electron lasers (FELs). Radio-
frequency (RF) transverse deflector structures (TDSs) are typically employed to characterize …

Time-resolved diagnostics at free-electron laser (FEL) facilities, in particular electron beam
longitudinal phase space (LPS) and FEL power profile measurements, provide information …

Dedicated wakefield-generating structures are capable of measuring the electron beam
current profile, and of removing residual energy chirps (dechirping). Furthermore, at Free …