Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session S11: V: Ultrafast Phenomena
10:30 AM–12:30 PM,
Thursday, June 8, 2023
Room: Virtual Platform
Chair: Carlos Marante Valdes, University of Central Florida
Abstract: S11.00005 : Exploring damage reduction and scattering cross section enhancement in attosecond X-ray imaging of neon near the K-edge*
11:18 AM–11:30 AM
Presenter:
Anatoli Ulmer
(Universität Hamburg)
Authors:
Anatoli Ulmer
(Universität Hamburg)
Stephan Kuschel
(Universität Hamburg)
Bruno Langbehn
(TU Berlin)
Linos Hecht
(ETH Zürich)
Simon Dold
(European XFEL)
Lara Rönnebeck
(Universität Hamburg)
Taran Driver
(SLAC)
Joseph Duris
(SLAC)
Andrei Kamalov
(SLAC)
Xiang Li
(SLAC)
Ming-Fu Lin
(SLAC)
Razib Obaid
(SLAC)
Adam M Summers
(SLAC)
Peter Walter
(SLAC)
James Cryan
(SLAC)
Rupp Daniela
(ETH Zürich)
Agostino Marinelli
(SLAC)
Tais Gorkhover
(Universität Hamburg)
on behalf of the LV17 collaboration
(Universität Hamburg)
Using the newly available XLEAP technique [Duris et al., Nat. Photonics 14, 30–36], we performed single-exposure X-ray diffraction experiments on individual neon nanoparticles around the K-edge at the TMO beamline at the LCLS. We have compared images recorded with ~18 fs pulses to snapshots captured with sub-fs pulses, which are shorter than the 3 fs life time of the K-shell core hole. The coincident ion spectra mirrored the ionization degree and thus, damage to the nanoparticle illuminated by the FEL. We observe an irradiance-dependent increase in scattering cross section near the K-edge, hinting towards transient resonance effects. At the same time, the XLEAP pulses seem to cause less damage than the 18 fs pulses with similar fluence. Preliminary results and possible explanations for the impacts of photon flux and pulse duration will be discussed.
*Use of the Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES) under Contract No. DE-AC02-76SF00515. We acknowledge funding by the Cluster of Excellence 'CUI: Advanced Imaging of Matter' of the Deutsche Forschungsgemeinschaft (DFG) - EXC 2056 - project ID 390715994. This work is co-funded by the European Union (ERC, 101040547 - HIGH-Q).
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