Over the last 20 years, XUV and X-ray free-electron lasers have enabled a wide variety of
time-resolved experiments that have dramatically advanced our understanding of ultrafast …

Self-amplified spontaneous emission (SASE) pulses delivered by free electron lasers (FELs)
are inherently fluctuating sources; each pulse varies in energy, duration, arrival time and …

A beamline for temporal diagnostics of extreme ultraviolet (XUV) femtosecond pulses at the
free-electron laser in Hamburg (FLASH) at DESY was designed, built and put into operation …

In recent years, femtosecond extreme-ultraviolet (XUV) and x-ray pulses from free-electron
lasers have developed into important probes to monitor processes and dynamics in matter …

FLASH is the first soft X-ray FEL user facility, routinely providing brilliant photon beams for
users since 2005. The second undulator branch of this facility, FLASH2, is gap-tunable …

High temporal resolution is essential for ultra-fast pump-probe experiments. Arrival time jitter
and drift measurements, as well as their control, become critical especially when combining …

We report on the implementation of a laser-dressed photoionization method aimed at
measuring the temporal structure of high-order harmonics generated from plasma mirrors at …

A fast and robust, yet simple, method has been developed for the immediate
characterization of x-ray pulse durations via IR/THz streaking that uses the center of energy …

Free-electron lasers (FELs) operating in the extreme ultraviolet (XUV) and X-ray regions
deliver ultrashort pulses with unprecedented intensity, enabling groundbreaking research …

Self-amplified spontaneous-emission (SASE) free-electron lasers (FELs) deliver ultrashort
pulses with femtosecond durations. Due to the fluctuating nature of the radiation properties …