Speaker
Description
The ultrafast motion of electrons drives chemical reactions and underpins material properties. Investigating these ultrafast dynamics demands state-of-the-art light sources, frequently requiring pulses with attosecond duration. The use of soft X-ray pulses makes it possible to probe electronic densities with atomic-site specificity. X-ray free-electron lasers (XFELs) have increased the per-pulse flux of attosecond sources by orders of magnitude, facilitating nonlinear and multidimensional spectroscopy in the X-ray regime. While multidimensional measurements provide higher fidelity of ultrafast dynamics, the significant statistical demands of these attosecond experiments have limited feasibility at low-repetition-rate sources. Here, we report the generation and temporal characterization of isolated attosecond X-ray pulses at a kilohertz repetition rate from a continuous-wave (CW) superconducting accelerator. This advance in repetition rate enabled a two-orders-of-magnitude reduction in data acquisition time for a representative attosecond pump-probe experiment, opening the door for mapping complex ultrafast dynamics with high dimensionality.
| Working group | WG6 |
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