Speaker
Description
Attosecond X-ray pulses are a pioneering tools for real-time observation of ultrafast electronic dynamics in atoms and molecules, opening up revolutionary advances in chemistry, materials science, and condensed-matter physics. Existing attosecond sources are, however, constrained by low photon energy and flux, which limits their experimental applications. we present here start-to-end simulations of a compact soft-X-ray FEL, taking advantage of attosecond electron beam generated from PWFA to provide terawatt-level peak power in pulses of merely tens of attoseconds duration. High-brightness electrons produced in PWFA are longitudinally compressed in a magnetic arc and then injected into an undulator. By tuning the undulator taper, two isolated spikes of radiation—each tens of attosecond duration and terawatt peak power are generated for inherent pump–probe application with tunable delays. Such an ultraintense, ultrashort source offers a direct route to table-top X-ray light sources and facilitates attosecond-resolution experiments with unprecedented intensity and time resolution.
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