Abstract
Minimising the pressure gradients in large-anvil pressure cells is one of conditions for getting the high-quality results in investigations of structural and physical properties of the solid state. Pressure or temperature distributions in such devices are usually studied by scanning the sample with finely collimated X-ray beam. The previously reported pressure and temperature distributions in diamond anvil cells as well as temperature distributions in large-anvil cells, exhibit a strong dependence on materials of the sample environment and on the construction of sample assembly (data for pressure distribution in large-anvil cells were not available in literature). Present experiments were performed in energy-dispersive mode at MAX80 X-ray diffraction press installed at F2.1 beamline (Hasylab). The pressure distribution along the z-axis of a cylindrical NaCl sample mounted within a graphite heater embedded in a boron-epoxy cube was derived from the energetical positions of the 002 reflection along the sample scanned with white collimated X-ray beam. The pressure is found to be constant along the z-axis.
Published Version
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