M. Chollet

TL;DR: In this article, a measure-and-sort approach was used to achieve sub-10 fs root-mean-squared (rms) error measurement at hard X-ray FELs, far beyond the 100-200 fs rms jitter limitations.

TL;DR: Three-dimensional imaging of the generation and subsequent evolution of coherent acoustic phonons on the picosecond time scale within a single gold nanocrystal by means of an x-ray free-electron laser is reported, providing insights into the physics of this phenomenon.

TL;DR: Time-resolved X-ray diffraction is applied to directly measure the changes in long-range order during ultrafast melting of the charge and orbitally ordered phase in a perovskite manganite to find the dynamics of the phase transformation can be well described using a single time-dependent 'order parameter' that depends exclusively on the electronic excitation.

TL;DR: The authors' results unambiguously show how initially localized chemical changes can propagate at the level of the global protein conformation in the picosecond timescale.

TL;DR: A scheme for generating two simultaneous hard-x-ray free-electron laser pulses with a controllable difference in photon energy is described and then demonstrated using the self-seeding setup at the Linac Coherent Light Source.