Pressure profiles at multimegabar pressures in a diamond anvil cell using x-ray diffraction
- 1 February 1988
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 59 (2) , 318-321
- https://doi.org/10.1063/1.1140248
Abstract
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.Keywords
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