Diamond anvils with a round table designed for high pressure experiments in DAC

ABSTRACT

Here, we present new Diamond Anvils with a Round Table (DART-anvils) designed for applications in the diamond anvil cell (DAC) technique. The main features of the new DART-anvil design are a spherical shape of both the crown and the table of a diamond and the position of the centre of the culet exactly in the centre of the sphere. The performance of DART-anvils was tested in a number of high pressure high-temperature experiments at different synchrotron beamlines. These experiments demonstrated a number of advantages, which are unavailable with any of the hitherto known anvil designs. Use of DART-anvils enables to realise in situ single-crystal X-ray diffraction experiments with laser heating using stationary laser-heating setups; eliminating flat-plate design of conventional anvils, DART-anvils make the cell alignment easier; working as solid immersion lenses, they provide additional magnification of the sample in a DAC and improve the image resolution.

KEYWORDS:

• Diamond anvil cell technique
• high pressure generation
• DART-anvil
• single-crystal X-ray diffraction
• laser heating

Acknowledgements

We thank Dutch Diamond Technologies BV and Almax easyLab Group Ltd for producing the DART-anvils according to our design. Technical support of S. Übelhack (Bayerisches Geoinstitut) is gratefully acknowledged. Portions of this work were performed at GeoSoilEnviroCARS (The University of Chicago, Sector 13), Advanced Photon Source (APS), Argonne National Laboratory. GeoSoilEnviroCARS is supported by the National Science Foundation – Earth Sciences (EAR – 1634415) and Department of Energy- GeoSciences (DE-FG02-94ER14466). This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.

Disclosure statement

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

Additional information

Funding

N.D. thanks the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG, projects no. DU 954-8/1 and DU 954-11/1) and the Federal Ministry of Education and Research, Germany (BMBF, grants no. 5K13WC3 and 5K16WC1) for financial support. L.D. acknowledges DFG funding through projects the CarboPaT Research Unit FOR2125 and the Research Unit FOR 2440 - Matter under Planetary Interior Conditions.