Laser-induced melting of a single crystal gold sample by time-resolved

摘要

We report the experimental demonstration of time-resolved relativistic electron diffraction. Singlenshot diffraction patterns from a single crystal gold sample were recorded using ultrashort 3.5 MeVnelectron bunches from a radio frequency photoinjector. By scanning the pump pulse time-delay, wenstudied the Bragg peaks amplitude change due to the laser-induced melting of the sample. Thenobserved time scale matches the one predicted using a simple two temperature model of the heatingnof the thin foil. Time-resolved relativistic electron diffraction using megaelectronvolt electronnbeams with 107nparticles in 100 fs bunch length opens exciting possibilities in ultrafast structuralndynamics. © 2010 American Institute of Physics. u0004doi:10.1063/1.3478005