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Journal Article

A portable on-axis laser-heating system for near-90°X-ray spectroscopy: application to ferropericlase and iron silicide

Authors
/persons/resource/gspiek

Spiekermann,  Georg
3.6 Chemistry and Physics of Earth Materials, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Kupenko,  I.
External Organizations;

Petitgirard,  S.
External Organizations;

Harder,  M.
External Organizations;

Nyrow,  A.
External Organizations;

Weis,  C.
External Organizations;

Albers,  C.
External Organizations;

Biedermann,  N.
External Organizations;

Libon,  L.
External Organizations;

Sahle,  C.J.
External Organizations;

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Fulltext (public)

5000141.pdf
(Publisher version), 2MB

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Citation

Spiekermann, G., Kupenko, I., Petitgirard, S., Harder, M., Nyrow, A., Weis, C., Albers, C., Biedermann, N., Libon, L., Sahle, C. (2020): A portable on-axis laser-heating system for near-90°X-ray spectroscopy: application to ferropericlase and iron silicide. - Journal of Synchrotron Radiation, 27, 414-424.
https://doi.org/10.1107/S1600577519017041


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5000141
Abstract
A portable IR fiber laser-heating system, optimized for X-ray emission spectroscopy (XES) and nuclear inelastic scattering (NIS) spectroscopy with signal collection through the radial opening of diamond anvil cells near 90°with respect to the incident X-ray beam, is presented. The system offers double-sided on-axis heating by a single laser source and zero attenuation of incoming X-rays other than by the high-pressure environment. A description of the system, which has been tested for pressures above 100 GPa and temperatures up to 3000 K, is given. The XES spectra of laser-heated Mg0.67Fe0.33O demonstrate the potential to map the iron spin state in the pressure–temperature range of the Earth's lower mantle, and the NIS spectra of laser-heated FeSi give access to the sound velocity of this candidate of a phase inside the Earth's core. This portable system represents one of the few bridges across the gap between laser heating and high-resolution X-ray spectroscopies with signal collection near 90°.