Developments of nano-polycrystalline diamond anvil cells for neutron diffraction experiments

ABSTRACT

A new high pressure cell for neutron diffraction experiments using nano-polycrystalline anvils is presented. The cell design, off-line pressure generation tests and a gas-loading procedure for this cell are described. The performance is illustrated by powder neutron diffraction patterns of ice VII to ∼82 GPa. We also demonstrate the feasibility of single crystal neutron diffraction experiments of Fe₃O₄ at ambient conditions using this cell and discuss the current limitation and future developments.

KEYWORDS:

• Neutron diffraction
• nano-polycrystalline diamond
• high pressure

Acknowledgments

We are grateful to Drs. J. Abe and K. Funakoshi for their assistance to the experiments, and Dr. H. Arima for giving information on the focusing mirror. Y. Guarnelli and A. Polian for help in the gas loading at IMPMC and J. Philippe for help in the design of the original sapphire cell. Neutron diffraction experiments were performed through the J-PARC user programs (Nos. 2016I0011, 2017I0011, 2019I0011, 2019B0119). This study was supported by JSPS KAKENHI (Grant Numbers: 18H05224, 18H01936, 15H05829) and JSPS-CNRS bilateral joint research project.

Disclosure statement

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

ORCID

Kazuki Komatsu http://orcid.org/0000-0003-3573-9174

Stefan Klotz http://orcid.org/0000-0002-5682-4960

Keishiro Yamashita http://orcid.org/0000-0003-3215-3995

Additional information

Funding

This study was supported by Japan Society for the Promotion of Science (JSPS KAKENHI) [grant numbers 18H05224, 18H01936, 15H05829] and JSPS-CNRS bilateral joint research project [grant number PRC2191].