In:
Journal of Synchrotron Radiation, International Union of Crystallography (IUCr), Vol. 30, No. 4 ( 2023-07-01), p. 822-830
Abstract:
A von Hámos spectrometer has been implemented in the vacuum interaction chamber 1 of the High Energy Density instrument at the European X-ray Free-Electron Laser facility. This setup is dedicated, but not necessarily limited, to X-ray spectroscopy measurements of samples exposed to static compression using a diamond anvil cell. Si and Ge analyser crystals with different orientations are available for this setup, covering the hard X-ray energy regime with a sub-eV energy resolution. The setup was commissioned by measuring various emission spectra of free-standing metal foils and oxide samples in the energy range between 6 and 11 keV as well as low momentum-transfer inelastic X-ray scattering from a diamond sample. Its capabilities to study samples at extreme pressures and temperatures have been demonstrated by measuring the electronic spin-state changes of (Fe 0.5 Mg 0.5 )O, contained in a diamond anvil cell and pressurized to 100 GPa, via monitoring the Fe K β fluorescence with a set of four Si(531) analyser crystals at close to melting temperatures. The efficiency and signal-to-noise ratio of the spectrometer enables valence-to-core emission signals to be studied and single pulse X-ray emission from samples in a diamond anvil cell to be measured, opening new perspectives for spectroscopy in extreme conditions research.
Type of Medium:
Online Resource
ISSN:
1600-5775
DOI:
10.1107/S1600577523003041
DOI:
10.1107/S1600577523003041/ok5088sup1.pdf
Language:
Unknown
Publisher:
International Union of Crystallography (IUCr)
Publication Date:
2023
detail.hit.zdb_id:
2021413-3
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