Dynamics of space-charge acceleration of X-ray generated electrons emitted from a metal surface

摘要

Highlights?Laser induced space-charge acceleration of electrons (up to 1keV) is investigated.?A simple scaling behavior of the time-dependence and all-over energy shift is found.?Measured absolute energy shifts agree well with the model results.?Thus, image charges and a realistic angular hot-electron-distribution are important.?Results do not depend on Auger vs. photo electron-production mechanism.AbstractThe so-called vacuum space-charge acceleration of emitted electrons triggered by absorption of soft X-rays (a few 100eV) under intense near-infrared laser excitation is studied experimentally and theoretically. The influence of high excitation densities on the properties of Auger and photo electrons liberated by a probe X-ray beam is investigated for grazing-incidence photons interacting with