Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 88, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4997265
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- Energy Frontier Research in Extreme Environments (EFree) Center, an Energy Frontier Research Center - U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-SC0001057]
- Laboratory Directed Research and Development Program of Oak Ridge National Laboratory
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Traditionally, neutron diffraction at high pressure has been severely limited in pressure because low neutron flux required large sample volumes and therefore large volume presses. At the high-flux Spallation Neutron Source at the Oak Ridge National Laboratory, we have developed new, large-volume diamond anvil cells for neutron diffraction. The main features of these cells are multi-carat, single crystal chemical vapor deposition diamonds, very large diffraction apertures, and gas membranes to accommodate pressure stability, especially upon cooling. A new cell has been tested for diffraction up to 40 GPa with an unprecedented sample volume of similar to 0.15 mm(3). High quality spectra were obtained in 1 h for crystalline Ni and in similar to 8 h for disordered glassy carbon. These new techniques will open the way for routine megabar neutron diffraction experiments. Published by AIP Publishing.
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