Methodology for in situ synchrotron X-ray studies in the laser-heated diamond anvil cell

ABSTRACT

A review of some important technical challenges related to in situ diamond anvil cell laser heating experimentation at synchrotron X-ray sources is presented. The problem of potential chemical reactions between the sample and the pressure medium or the carbon from the diamond anvils is illustrated in the case of elemental tantalum. Preliminary results of a comparison between reflective and refractive optics for high temperature measurements in the laser-heated diamond anvil cell are briefly discussed. Finally, the importance of the size and relative alignment of X-ray and laser beams for quantitative X-ray measurements is presented.

KEYWORDS:

• Laser heating
• diamond anvil cells
• X-rays
• chemical reactions
• temperature measurements

Acknowledgements

We would like to thank R. Boehler, R.L. Benedetti, D. Andrault, G. Fiquet and P. Loubeyre for fruitful discussions and suggestions. This work was performed at the beamline ID27 and off-line laser laboratory of the European Synchrotron Radiation Facility (ESRF).

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by Commissariat à l’Énergie Atomique et aux Énergies Alternatives; European Synchrotron Radiation Facility.