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Journal Article

Synchronized beamline at FLASH2 based on high-order harmonic generation for two-color dynamics studies

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Lindenblatt,  Hannes Carsten
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Moshammer,  R.
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Citation

Appi, E., Papadopoulou, C. C., Mapa, J. L., Jusko, C., Mosel, P., Schoenberg, A., et al. (2021). Synchronized beamline at FLASH2 based on high-order harmonic generation for two-color dynamics studies. Review of Scientific Instruments, 92(12): 123004. doi:10.1063/5.0063225.


Cite as: https://hdl.handle.net/21.11116/0000-000A-3A1A-9
Abstract
We present the design, integration, and operation of the novel vacuum
ultraviolet (VUV) beamline installed at the free-electron laser (FEL)
FLASH. The VUV source is based on high-order harmonic generation (HHG)
in gas and is driven by an optical laser system synchronized with the
timing structure of the FEL. Ultrashort pulses in the spectral range
from 10 to 40 eV are coupled with the FEL in the beamline FL26, which
features a reaction microscope (REMI) permanent endstation for
time-resolved studies of ultrafast dynamics in atomic and molecular
targets. The connection of the high-pressure gas HHG source to the
ultra-high vacuum FEL beamline requires a compact and reliable system,
able to encounter the challenging vacuum requirements and coupling
conditions. First commissioning results show the successful operation of
the beamline, reaching a VUV focused beam size of about 20 mu m at the
REMI endstation. Proof-of-principle photo-electron momentum measurements
in argon indicate the source capabilities for future two-color
pump-probe experiments.(c) 2021 Author(s). All article content, except
where otherwise noted, is licensed under a Creative Commons Attribution
(CC BY) license(http://creativecommons.org/licenses/by/4.0/).