Large-volume diamond cells for neutron diffraction above 90 GPa

R. Boehler; M. Guthrie; J. J. Molaison; A. M. Dos Santos; S. Sinogeikin; S. Machida; N. Pradhan; C. A. Tulk

doi:10.1080/08957959.2013.823197

Large-volume diamond cells for neutron diffraction above 90 GPa

R. Boehler, M. Guthrie, J. J. Molaison, A. M. Dos Santos, S. Sinogeikin, S. Machida, N. Pradhan, C. A. Tulk

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70 Scopus citations

Abstract

Quantitative high pressure neutron-diffraction measurements have traditionally required large sample volumes of at least ~25 mm³ due to limited neutron flux. Therefore, pressures in these experiments have been limited to below 25 GPa. In comparison, for X-ray diffraction, sample volumes in conventional diamond cells for pressures up to 100 GPa have been less than 1 × 10^-4 mm³. Here, we report a new design of strongly supported conical diamond anvils for neutron diffraction that has reached 94 GPa with a sample volume of ~2 × 10^-2 mm³, a 100-fold increase. This sample volume is sufficient to measure full neutron-diffraction patterns of D₂O-ice to this pressure at the high flux Spallation Neutrons and Pressure beamline at the Oak Ridge National Laboratory. This provides an almost fourfold extension of the previous pressure regime for such measurements.

Original language	English
Pages (from-to)	546-554
Number of pages	9
Journal	High Pressure Research
Volume	33
Issue number	3
DOIs	https://doi.org/10.1080/08957959.2013.823197
State	Published - Aug 20 2013

Funding

This work is supported by EFree, an Energy Frontier Research Center funded by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES) under Award No. DE-SC0001057. Research conducted at the SNS was supported by the Scientific User Facilities division, BES, DOE, under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC.

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences	DE-AC05-00OR22725, DE-SC0001057

Keywords

Diamond-anvil cells
High pressure
Neutron diffraction

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10.1080/08957959.2013.823197

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title = "Large-volume diamond cells for neutron diffraction above 90 GPa",

abstract = "Quantitative high pressure neutron-diffraction measurements have traditionally required large sample volumes of at least ~25 mm3 due to limited neutron flux. Therefore, pressures in these experiments have been limited to below 25 GPa. In comparison, for X-ray diffraction, sample volumes in conventional diamond cells for pressures up to 100 GPa have been less than 1 × 10-4 mm3. Here, we report a new design of strongly supported conical diamond anvils for neutron diffraction that has reached 94 GPa with a sample volume of ~2 × 10-2 mm3, a 100-fold increase. This sample volume is sufficient to measure full neutron-diffraction patterns of D2O-ice to this pressure at the high flux Spallation Neutrons and Pressure beamline at the Oak Ridge National Laboratory. This provides an almost fourfold extension of the previous pressure regime for such measurements.",

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AU - Boehler, R.

AU - Guthrie, M.

AU - Molaison, J. J.

AU - Dos Santos, A. M.

AU - Sinogeikin, S.

AU - Machida, S.

AU - Pradhan, N.

AU - Tulk, C. A.

PY - 2013/8/20

Y1 - 2013/8/20

N2 - Quantitative high pressure neutron-diffraction measurements have traditionally required large sample volumes of at least ~25 mm3 due to limited neutron flux. Therefore, pressures in these experiments have been limited to below 25 GPa. In comparison, for X-ray diffraction, sample volumes in conventional diamond cells for pressures up to 100 GPa have been less than 1 × 10-4 mm3. Here, we report a new design of strongly supported conical diamond anvils for neutron diffraction that has reached 94 GPa with a sample volume of ~2 × 10-2 mm3, a 100-fold increase. This sample volume is sufficient to measure full neutron-diffraction patterns of D2O-ice to this pressure at the high flux Spallation Neutrons and Pressure beamline at the Oak Ridge National Laboratory. This provides an almost fourfold extension of the previous pressure regime for such measurements.

AB - Quantitative high pressure neutron-diffraction measurements have traditionally required large sample volumes of at least ~25 mm3 due to limited neutron flux. Therefore, pressures in these experiments have been limited to below 25 GPa. In comparison, for X-ray diffraction, sample volumes in conventional diamond cells for pressures up to 100 GPa have been less than 1 × 10-4 mm3. Here, we report a new design of strongly supported conical diamond anvils for neutron diffraction that has reached 94 GPa with a sample volume of ~2 × 10-2 mm3, a 100-fold increase. This sample volume is sufficient to measure full neutron-diffraction patterns of D2O-ice to this pressure at the high flux Spallation Neutrons and Pressure beamline at the Oak Ridge National Laboratory. This provides an almost fourfold extension of the previous pressure regime for such measurements.

KW - Diamond-anvil cells

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KW - Neutron diffraction

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Large-volume diamond cells for neutron diffraction above 90 GPa

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Keywords

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