Laser-induced electron Fresnel diffraction by XUV pulses at extreme intensity

Correlated electronic decay in expanding clusters triggered by intense XUV pulses from a Free-Electron-Laser

Irradiation of nanoscale clusters and large molecules with intense laser pulses transforms them into highly-excited non- equilibrium states. The dynamics of intense laser-cluster interaction is encoded in electron kinetic energy spectra, which contain signatures of direct photoelectron emission as well as emission of thermalized nanoplasma electrons. In this work we report on a so far not obser...

Laser-induced electron tunneling and diffraction.

Molecular structure is usually determined by measuring the diffraction pattern the molecule impresses on x-rays or electrons. We used a laser field to extract electrons from the molecule itself, accelerate them, and in some cases force them to recollide with and diffract from the parent ion, all within a fraction of a laser period. Here, we show that the momentum distribution of the extracted e...

Ultrafast Molecular Imaging by Laser Induced Electron Diffraction

Temporal and spatial coherence properties of Free Electron Laser pulses in the XUV regime

A. Singer, K. Tiedtke, and I. A. Vartanyants Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22603 Hamburg, Germany (Dated: June 30, 2011) Abstract The average temporal (longitudinal) and spatial (transverse) coherence of free electron laser pulses in the extreme ultraviolet (XUV) at FLASH is measured by interfering two time-delayed partial beams directly on a CCD camera. Wavelengths between...

Single-shot spectro-temporal characterization of XUV pulses from a seeded free-electron laser

Intense ultrashort X-ray pulses produced by modern free-electron lasers (FELs) allow one to probe biological systems, inorganic materials and molecular reaction dynamics with nanoscale spatial and femtoscale temporal resolution. These experiments require the knowledge, and possibly the control, of the spectro-temporal content of individual pulses. FELs relying on seeding have the potential to p...