New opportunities for high pressure X-ray absorption spectroscopy at ID24-DCM and BM23 with the Extremely Brilliant Source of the ESRF

ABSTRACT

Here we present the new experimental stations devoted to the studies of matter under extreme conditions at the X-ray absorption beamlines BM23 and ID24-DCM that were recently refurbished within the ESRF – Extremely Brilliant Source (EBS) upgrade program. In comparison with the stations before the EBS upgrade, they exhibit outstanding performances in terms of sample positioning capabilities, acceptance of multi-detection systems and complex sample environments. In addition, significant improvements regarding the photon flux and focusing capabilities down to the submicron size have been achieved. These stations are now coupled with the new ESRF double crystal monochromators that exhibit an exceptional beam position and energy stability and that permit quick micro-EXAFS measurements down to one EXAFS/second, and hyperspectral EXAFS mapping. In this contribution, we discuss the choices regarding the sample and detector stages and illustrate the potential of the new setups for extreme conditions studies based on selected preliminary results.

KEYWORDS:

• high pressure
• ESRF EBS
• DAC
• microXAS
• EXAFS

Acknowledgements

We would like to thank the ESRF for providing beamtime for the scientific projects. The reference Os data shown in Figure 11 were taken on the beamline BL37XU at Spring8, Japan during an experiment associated with proposal No 2019B1521.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

S. B., S. D. and D. A. have received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme [grant number 724690]. G. M. has been supported by the ANR grant MinDIXI (ANR-22-CE49-0006). S. A. thanks the Generalitat Valenciana for the CIDEGENT grant no. CIDEXG/2022/6.