John D. Bozek

TL;DR: In this article, an x-ray-optical cross-correlation technique was proposed to determine the duration of femtosecond (>40?fs) x-rays from the Linac Coherent Light Source (LCLS).

TL;DR: In this paper, the authors present pump probe experiments with femtosecond time resolution using free electron laser (FEL) facilities. And they provide the ideal targets for early experiments by which not only FELs can be characterised and benchmarked but can also be the natural departure point in the hunt for non-linear behaviour of atomistic systems bathed in laser fields of ultrahigh photon energy.

TL;DR: In this article, the authors demonstrated X-ray measurements with a temporal resolution shorter than 1 fs, opening up new possibilities for time-resolved Xray experiments, making it desirable to reduce the error rate in the 1'fs level.

TL;DR: In this article, single Xe clusters are superheated using an intense optical laser pulse and the structural evolution is imaged with a single X-ray pulse, and the surface softening on the nanometre scale is resolved within 100 fs at the vacuum/sample interface.

TL;DR: X-ray-initiated isomerization of acetylene, a model for proton dynamics in hydrocarbons, is studied to conclude that significant proton motion occurs on a timescale comparable to the Auger relaxation that refills the K-shell vacancy.