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Updated: Feb 23, 2026

$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

Novel diamond cells for neutron diffraction using multi-carat CVD anvils.

R Boehler¹, J J Molaison², B Haberl¹

¹Chemical and Engineering Materials Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.

The Review of Scientific Instruments

|September 3, 2017

Summary

Researchers developed new diamond anvil cells for neutron diffraction, enabling high-pressure studies with larger sample volumes. This breakthrough paves the way for routine megabar neutron diffraction experiments.

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$High Pressure Single Crystal Diffraction at PX^2$

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Published on: January 16, 2017

Area of Science:

Materials Science
Condensed Matter Physics
Geophysics

Background:

High-pressure neutron diffraction is crucial for understanding material properties under extreme conditions.
Traditional methods were limited by low neutron flux, necessitating large sample volumes and limiting achievable pressures.

Purpose of the Study:

To overcome the limitations of traditional high-pressure neutron diffraction.
To develop novel large-volume diamond anvil cells for enhanced neutron diffraction capabilities.

Main Methods:

Development of new large-volume diamond anvil cells utilizing multi-carat single crystal chemical vapor deposition diamonds.
Incorporation of large diffraction apertures and gas membranes for pressure stability.
Testing diffraction capabilities up to 40 GPa with sample volumes of approximately 0.15 mm³.

Main Results:

Successful neutron diffraction experiments were conducted up to 40 GPa.
High-quality diffraction spectra were obtained for crystalline nickel in 1 hour and glassy carbon in approximately 8 hours.
Demonstrated unprecedented sample volumes for high-pressure neutron diffraction.

Conclusions:

The developed diamond anvil cells significantly advance high-pressure neutron diffraction capabilities.
These new techniques enable routine megabar neutron diffraction experiments.
Facilitates the study of materials under extreme pressures, crucial for various scientific fields.