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Instruments / Technical Area	Publication Details	Published	Actions
B16-Test Beamline Optics	Sub-100 nanometer focusing of hard X-rays using SU-8 compound kinoform focusing lenses Yuanze Xu , Vishal Dhamgaye , Hongchang Wang , Oliver Fox , Futing Yi , Ming Li , Weiwei Zhang , Junliang Yang , David Laundy , Dongni Zhang , Kawal Sawhney , Jing Liu , He Lin Advanced Photonics Research 7 DOI: 10.1002/adpr.202500013 Diamond Proposal Number(s): [34816] Open Access Show Abstract ▼ Abstract: A novel aberration-free X-ray compound refractive kinoform lens design based on the Cartesian oval curve is presented, designated as the OVAL-OK (OVAL Overlap Kinoform) lens. Material infilling of the kinoform step structure maintains focal spot dimensions while reducing focal intensity and reproducibility of structures. A SU-8 OVAL-OK lens fabricated through X-ray lithography achieved vertical focal sizes of 70.8 nm (knife-edge scanning) and 56 nm (wavefront propagation analysis) under 15 keV X-ray illumination, using a 120 μm × 200 μm (horizontal × vertical) aperture and 40.8 mm working distance. The lens exhibits a horizontal structural depth of 170 μm and a minimum feature size of 5 μm. The observed discrepancy between direct knife-edge measurements and wavefront-derived values is attributable to the combined effects of geometric, diffraction, coherence, instrumental instability, etc. These results demonstrate the potential for achieving sub-50 nm 2D focusing in future iterations through enhanced structural depth and expanded aperture dimensions.	Apr 2026
I15-1-X-ray Pair Distribution Function (XPDF)	Local structure and lithium-ion diffusion pathway of cubic Li7La3Zr2O12 studied by total scattering and the Reverse Monte Carlo method Haolai Tian , Guanqun Cai , Lei Tan , He Lin , Anthony E. Phillips , Isaac Abrahams , David A. Keen , Dean S. Keeble , Andy Fiedler , Junrong Zhang , Xiang Yang Kong , Martin T. Dove Journal Of Materials Chemistry A 46 DOI: 10.1039/D3TA04495E Diamond Proposal Number(s): [19378] Open Access Show Abstract ▼ Abstract: The lithium-ion conducting solid electrolyte Li7La3Zr2O12 has one crystalline phase that has the cubic garnet structure, and this phase has one of the highest room temperature lithium-ion conductivities of any oxide. Neutron and X-ray total scattering data, analysed by the Reverse Monte Carlo method, have been used to examine the distribution of lithium ions over a wide range of temperatures, and to explore aspects of the stability and flexibility of the basic oxide structure. We compare the results with those from supporting molecular dynamics simulations. Unlike previous work, our method requires no prior assumptions about the Li ion distribution. Using total scattering rather than solely Bragg scattering, we obtain much higher real-space resolution than previously available. The combination of X-ray and neutron scattering allows detailed characterisation of both the mobile and immobile sublattices. Only a small fraction of Li ions are mobile at any one time; diffusion occurs primarily by movement between Li2 sites via empty Li1 sites.	Oct 2023

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