A useful way to study a wide range of materials with ordered and disordered phases at high pressures is with the X-ray Pair Distribution Function (PDF) method. Typically one uses a Diamond Anvil Cell (DAC) to create the high pressure environment for the sample. High quality X-ray PDF data is best obtained by using high energy photons, preferably 50 KeV and higher. In a DAC, the small sample volumes and the close proximity of the gasket material to the sample motivates the use of focusing lenses to increase the flux density of photons on the sample, while simultaneously decreasing the flux density on the gasket. We investigate the use of kinoform lenses for this application of X-Ray PDF in a Diamond Anvil Cell.
Kinoform lenses for high photon energies
Kenneth Evans-Lutterodt, Fei Han, Wenge Yang, Yang Ren, Olaf Borkiewicz, Aaron Stein, Ming Lu, Sarvjit Shastri; Kinoform lenses for high photon energies. AIP Conf. Proc. 15 January 2019; 2054 (1): 040014. https://doi.org/10.1063/1.5084615
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