Pressure profiles at multimegabar pressures in a diamond anvil cell using x‐ray diffraction

Pressure distributions in a diamond anvil cell with a rhenium gasket have been measured at various pressures up to 212±6 GPa using energy dispersive x‐ray diffraction with a synchrotron source. Three sets of type IA yellow diamonds were used with bevels of 5°, 7°, and 10°. For the 7°‐beveled tips, a...

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Bibliographic Details
Published in:Review of scientific instruments 1988-02, Vol.59 (2), p.318-321
Main Authors: Brister, Keith E., Vohra, Yogesh K., Ruoff, Arthur L.
Format: Article
Language:English
Subjects:
Exact sciences and technology
High-pressure apparatus and techniques
shock tubes
diamond anvil cells
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
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Summary:Pressure distributions in a diamond anvil cell with a rhenium gasket have been measured at various pressures up to 212±6 GPa using energy dispersive x‐ray diffraction with a synchrotron source. Three sets of type IA yellow diamonds were used with bevels of 5°, 7°, and 10°. For the 7°‐beveled tips, a 5‐μm‐diam collimated beam was used to a pressure of 206±6 GPa. In the other experiments, collimators of 10–30 μm were used. In the region of the 50‐μm central flat, the pressure was essentially uniform. The effect of finite collimator size on the measurement of pressure profiles is also analyzed.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1140248