High gas-pressure apparatus for nonlinear X-ray propagation and reshaping via stimulated X-ray Raman scattering
(2025) In Scientific Reports 15(1).- Abstract
We describe an experimental setup for non-linear interaction and propagation of ultrashort and intense x-ray free-electron laser (XFEL) pulses in a dense gas. It allows one to provide high, but adjustable, target-gas pressures of up to 6 bar within a vacuum environment of 3∙10− 3 mbar or better. The setup enables investigation of intense x-ray propagation in an optically thick medium with minimal absorption loss of the unfocused beam outside of the target. As an application, we demonstrate the amplification of spectrally-resolved stimulated x-ray Raman scattering (SXRS) in dense neon gas, where the most intense inner part of the beam is almost completely absorbed. As a result, in the inner part of the beam, the SXRS signal... (More)
We describe an experimental setup for non-linear interaction and propagation of ultrashort and intense x-ray free-electron laser (XFEL) pulses in a dense gas. It allows one to provide high, but adjustable, target-gas pressures of up to 6 bar within a vacuum environment of 3∙10− 3 mbar or better. The setup enables investigation of intense x-ray propagation in an optically thick medium with minimal absorption loss of the unfocused beam outside of the target. As an application, we demonstrate the amplification of spectrally-resolved stimulated x-ray Raman scattering (SXRS) in dense neon gas, where the most intense inner part of the beam is almost completely absorbed. As a result, in the inner part of the beam, the SXRS signal exceeds the residual XFEL pulse by a factor of around two. In principle, this reshaping effect allows for a spatial separation of the two spectral components, i.e., the driving pulse and the SXRS signal.
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- author
- organization
- publishing date
- 2025-12
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- volume
- 15
- issue
- 1
- article number
- 43874
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:105025168665
- pmid:41398034
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-025-32245-x
- language
- English
- LU publication?
- yes
- id
- 6fa9e29c-f78c-411d-ab89-2ff78a9c1320
- date added to LUP
- 2026-02-12 16:19:37
- date last changed
- 2026-02-13 03:00:05
@article{6fa9e29c-f78c-411d-ab89-2ff78a9c1320,
abstract = {{<p>We describe an experimental setup for non-linear interaction and propagation of ultrashort and intense x-ray free-electron laser (XFEL) pulses in a dense gas. It allows one to provide high, but adjustable, target-gas pressures of up to 6 bar within a vacuum environment of 3∙10<sup>− 3</sup> mbar or better. The setup enables investigation of intense x-ray propagation in an optically thick medium with minimal absorption loss of the unfocused beam outside of the target. As an application, we demonstrate the amplification of spectrally-resolved stimulated x-ray Raman scattering (SXRS) in dense neon gas, where the most intense inner part of the beam is almost completely absorbed. As a result, in the inner part of the beam, the SXRS signal exceeds the residual XFEL pulse by a factor of around two. In principle, this reshaping effect allows for a spatial separation of the two spectral components, i.e., the driving pulse and the SXRS signal.</p>}},
author = {{Magunia, Alexander and Rebholz, Marc and Mazza, Tommaso and De Fanis, Alberto and Baumann, Thomas M. and Usenko, Sergey and Rennhack, Nils and Li, Kai and Simon, Marc and Agåker, Marcus and Rubensson, Jan Erik and Meyer, Michael and Young, Linda and Ott, Christian and Pfeifer, Thomas}},
issn = {{2045-2322}},
language = {{eng}},
number = {{1}},
publisher = {{Nature Publishing Group}},
series = {{Scientific Reports}},
title = {{High gas-pressure apparatus for nonlinear X-ray propagation and reshaping via stimulated X-ray Raman scattering}},
url = {{http://dx.doi.org/10.1038/s41598-025-32245-x}},
doi = {{10.1038/s41598-025-32245-x}},
volume = {{15}},
year = {{2025}},
}