A self-seeded X-ray free-electron laser (XFEL) is a promising approach to realize bright, fully
coherent free-electron laser (FEL) sources in the hard X-ray domain that have been a long …

We report on the generation of one-and two-color attosecond hard x-ray pulses at SwissFEL
by appropriately tailoring the nonlinear compression of the electron beam. For achieving …

Iron is one of the most studied chemical elements due to its sociotechnological and
planetary importance; hence, understanding its structural transition dynamics is of vital …

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) …

The transverse emittance of the electron beam is a fundamental parameter in linac-based x-
ray free-electron lasers (FELs). We present results of emittance measurements carried out at …

A Hanbury Brown and Twiss interferometry experiment based on second-order correlations
was performed at the PAL-XFEL facility. The statistical properties of the X-ray radiation were …

Attosecond measurements reveal new physical insights in photoionization dynamics from
atoms, molecules and condensed matter. However, on such time scales even a small timing …

We explain how the accelerating field amplitude and phase vary with modulator voltage in
pulsed radio frequency high-power amplifiers based on klystron tubes. Changes in …

With each single X-ray pulse having its own characteristics, understanding the individual
property of each X-ray free-electron laser (XFEL) pulse is essential for its applications in …

This paper presents a method that uses a gap scan of the phase shifter to optimize the
intensity of a free-electron laser (FEL) by matching its phase with that of the electron beam …