Abstract Short wavelength Free-Electron Lasers (FELs) are among the newest light sources
available to scientists to probe a wide range of phenomena, with chemical, physical and …

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 …

In ultrafast spectroscopy, the temporal resolution of time-resolved experiments depends on
the duration of the pump and probe pulses, and on the control and characterization of their …

The X-ray free-electron laser of the Pohang Accelerator Laboratory (PAL-XFEL) was opened
to users in 2017. Since then, significant progress has been made in PAL-XFEL operation …

In this article, the concept of a recently funded R&D project for the installation of a proof-of-
concept cavity-based x-ray free electron laser (CBXFEL) demonstrator experiment at the …

Advances of high intensity lasers have opened up the field of strong field physics and led to
a broad range of technological applications. Recent x-ray laser sources and optics …

Next-generation high-brilliance X-ray photon sources call for new X-ray optics. Here we
demonstrate the possibility of using monolithic diamond channel-cut crystals as high-heat …

Self-seeded hard X-ray pulses at PAL-XFEL were used to commission a resonant X-ray
emission spectroscopy experiment with a von Hamos spectrometer. The self-seeded beam …

Dynamics experiments are an important use-case for X-ray free-electron lasers (XFELs), but
time-domain measurements of the X-ray pulses themselves remain a challenge. Shot-by …

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 …