Colloquium Event

Towards Attosecond Molecular Movies with X-ray Free-Electron Lasers


The motion of electrons in molecules and solids occurs on the subfemtosecond timescale. Consequently, the study of ultrafast electronic phenomena requires the generation of laser pulses shorter than 1 fs and of sufficient intensity to interact with their target with high probability.

Since the first lasing of LCLS much progress has been made to improve the time resolution of X-ray free-electron laser (XFEL) experiments, reducing it by one order of magnitude over the initial 100 fs resolution. In my talk I will discuss the frontier of time-resolved pump/probe experiments with XFELs: the attosecond regime.

I will present our recent experimental results within the XLEAP project and discuss our ongoing effort to perform the first X-ray attosecond pump/probe experiment at LCLS-II. I will also discuss other related R&D topics such as electron beam-based ultrafast science and the application of advanced particle accelerators to the generation of Terawatt attosecond Xray pulses.

Speaker Name

Ago Marinelli

Speaker Institution

SLAC National Accelerator Laboratory

Speaker Information

Ago Marinelli is an assistant professor of Photon Science and Particle Physics and Astrophysics at SLAC. He is the head of the free-electron laser (FEL) physics department, co-lead of the FEL R&D program for LCLS, and a principal investigator at the Pulse institute. Ago’s research is focused on the physics of particle accelerators and X-FELs, as well as the applications of ultrafast X-ray pulses.

Ago completed his undergraduate education at the University of Rome, La Sapienza. He received his PhD in physics from the University of California, at Los Angeles and moved to SLAC in 2012 as a research associate. He was a Panofsky Fellow from 2015 to 2019 and joined the SLAC faculty in the fall of 2019. He received the 2014 Frank Sacherer Prize from the European Physical Society, the 2015 Outstanding Doctoral Thesis Research Award from the American Physical Society and the 2015 Young Investigator FEL Prize.


through PST


Kavli Auditorium