Linear accelerator-based free-electron lasers (FELs) are the leading source of fully coherent
X-rays with ultra-high peak powers and ultra-short pulse lengths. Current X-ray FEL facilities …

Free-electron lasers produce extremely brief, coherent, and bright laser-like photon pulses
that allow to image matter at atomic resolution and at timescales faster than the …

Following structural dynamics in real time is a fundamental goal towards a better
understanding of chemical reactions. Recording snapshots of individual molecules with …

X-ray free-electron lasers (XFELs) and table-top sources of x-rays based upon high
harmonic generation (HHG) have revolutionized the field of ultrafast x-ray atomic and …

First-principles calculations are employed to elucidate the modes of attosecond charge
migration (CM) in halogenated hydrocarbon chains. We use constrained density functional …

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 …

Ultrafast H2+ and H3+ formation from ethanol is studied using pump-probe spectroscopy
with an extreme ultraviolet (XUV) free-electron laser. The first pulse creates a dication …

Inner-shell photoelectron spectroscopy provides an element-specific probe of molecular
structure, as core-electron binding energies are sensitive to the chemical environment. Short …

Ultrafast electron transfer in dissociating iodomethane and fluoromethane molecules was
studied at the Linac Coherent Light Source free-electron laser using an ultraviolet-pump, X …

In pump-probe experiments employing a free-electron laser (FEL) in combination with a
synchronized optical femtosecond laser, the arrival-time jitter between the FEL pulse and the …