Bulletin of the American Physical Society
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 67, Number 7
Monday–Friday, May 30–June 3 2022; Orlando, Florida
Session K03: Ultrafast X-ray Science
10:30 AM–12:30 PM,
Wednesday, June 1, 2022
Room: Grand Ballroom B
Chair: Daniel Rolles, Kansas State
Abstract: K03.00002 : Imaging ultrafast molecular processes with high-repetition-rate X-ray free electron lasers*
11:00 AM–11:30 AM
Presenter:
Artem Rudenko
(Kansas State University)
Author:
Artem Rudenko
(Kansas State University)
The availability of high-repetition-rate XFEL facilities like the European XFEL and the upcoming LCLS-II opens up new exciting possibilities for time-resolved molecular imaging. In particular, techniques relying on multi-coincident charged-particle detection like Coulomb explosion imaging or molecular-frame photoelectron measurements now become feasible at XFELs. Recently, XFEL experiments of this type succeeded in obtaining complete momentum-space images of ring molecules, capturing the positions of all constituents including hydrogen atoms, enabled reconstruction of full three-dimensional geometry of smaller polyatomic molecules like halomethanes, and used photoelectron diffraction and spectroscopy to characterize X-ray-induced molecular dissociation. This talk will review recent progress in ion-ion and ion-electron coincident measurements at XFELs, discuss application of these techniques to time-resolved experiments and the relation to more conventional X-ray photoelectron spectroscopy. Specific examples will include XFEL-driven Coulomb explosion imaging of different C7H8 isomers and of strong-field driven dynamics in halomethanes, as well as potential applications to light-induced charge transfer reactions.
*This work is supported by the U.S. Department of Energy, Office ofScience, Basic Energy Sciences, Chemical Sciences, Geosciences,and Biosciences Division.
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