State of the art X-ray Free Electron Laser facilities currently provide the brightest X-ray pulses\navailable, typically with mJ energy and several hundred femtosecond duration. Here we present\none- and two-dimensional Particle-in-Cell simulations, utilising the process of stimulated Raman\namplification, showing that these pulses are compressed to a temporally coherent, sub-femtosecond\npulse at 8% efficiency. Pulses of this type may pave the way for routine time resolution of electrons\nin nm size potentials. Furthermore, evidence is presented that significant Landau damping and wave breaking\nmay be beneficial in distorting the rear of the interaction and further reducing the final\npulse duration.
Loading....