Attosecond Science at the Liac Coherent Light Source

The study of fundamental electronic phenomena requires state-of-the-art light sources, that can probe the ultrafast (sub-femtosecond) motion of electrons. X-ray sources such as the Linac Coherent Light Source~(LCLS), an X-ray free electron laser~(XFEL) facility which produces high-brightness, ultrashort pulses, with wavelength continuously tunable across the x-ray regime provide an excellent tool to probe electronic motion with atomic site-specificity. Schemes to provide isolated, sub-femtosecond pulses from an FEL are being explored at facilities world-wide, and recently we have demonstrated such pulses at the LCLS; opening the door for time-resolved measurements of ultrafast electron dynamics on their natural timescale. My poster will highlight the recent technological (source development) and scientific developments made with attosecond XFELs. These scientific developments include studying ultrafast electron dynamics in core-excited states using angular streaking, as well as attosecond pump/probe methods to probe charge motion in molecular ions.