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

Georg Spiekermann, Ilya Kupenko, Sylvain Petitgirard, Manuel Harder, Alexander Nyrow, Christopher Weis, Christian Albers, Nicole Biedermann, Lelia Libon, Christoph J. Sahle, Valerio Cerantola, Konstantin Glazyrin, Zuzana Konopkova, Ryosuke Sinmyo, Wolfgang Morgenroth, Ilya Sergueev, Hasan Yavas, Leonid Dubrovinsky, Metin Tolan, Christian SternemannMax Wilke

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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 100GPa and temperatures up to 3000K, 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°.

Original languageEnglish
Pages (from-to)414-424
Number of pages11
JournalJournal of Synchrotron Radiation
Volume27
DOIs
Publication statusPublished - 1 Mar 2020

Keywords

  • extreme conditions
  • high pressure
  • laser heating
  • nuclear resonant inelastic scattering
  • X-ray emission spectroscopy

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    Spiekermann, G., Kupenko, I., Petitgirard, S., Harder, M., Nyrow, A., Weis, C., Albers, C., Biedermann, N., Libon, L., Sahle, C. J., Cerantola, V., Glazyrin, K., Konopkova, Z., Sinmyo, R., Morgenroth, W., Sergueev, I., Yavas, H., Dubrovinsky, L., Tolan, M., ... Wilke, M. (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