Speaker
Description
Electron dynamics in molecules occur on sub-femtosecond timescales and drive fundamental processes such as photosynthesis, catalysis, and chemical bond transformations. Attosecond XFELs provide the temporal resolution and pulse power necessary to probe these phenomena. Emerging superconducting accelerator technology further enables high-repetition-rate operation, enhancing statistical sensitivity of data while compressing measurement time. Here, we present the first direct temporal measurements of single-shot attosecond soft X-ray pulses driven by a continuous-wave high-repetition-rate accelerator. Using angle-resolving electron time-of-flight spectrometers, we perform angular streaking measurements with high energy and temporal resolution, allowing complete pulse reconstructions. These measurements showcase the attosecond science capabilities of LCLS-II at high repetition rates and provide the foundation for controlling and shaping x-ray pulses to study ultrafast dynamics in complex systems with precision.
Funding Agency
This work was supported by US Department of Energy contract nos. DE-AC02-76SF00515, the DOE-BES Accelerator and detector research program, and DOE-BES, Chemical Sciences, Geosciences, and Biosciences.
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