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000613928 0247_ $$2arXiv$$aarXiv:2407.11022
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000613928 088__ $$2arXiv$$aarXiv:2407.11022
000613928 1001_ $$0P:(DE-H253)PIP1086598$$aCarlsen, Mads$$b0$$eCorresponding author
000613928 245__ $$aTexture tomography with high angular resolution utilizing sparsity
000613928 260__ $$c2024
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000613928 520__ $$aWe demonstrate a novel approach to the reconstruction of scanning probe x-ray diffraction tomography data with anisotropic poly crystalline samples. The method involves reconstructing a voxel map containing an orientation distribution function in each voxel of an extended 3D sample. This method differs from existing approaches by not relying on a peak-finding and is therefore applicable to sample systems consisting of small and highly mosaic crystalline domains that are not handled well by existing methods. Samples of interest include bio-minerals and a range of small-graines microstructures common in engineering metals. By choosing a particular kind of basis functions, we can effectively utilize non-negativity in orientation-space for samples with sparse texture. This enables us to achieve stable solutions at high angular resolutions where the problem would otherwise be under determined. We demonstrate the new approach using data from a shot peened martensite sample where we are able to map the twinning micro structure in the interior of a bulk sample without resolving the individual lattice domains. We also demonstrate the approach on a piece of gastropods shell with a mosaic micro structure.
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000613928 536__ $$0G:(EU-Grant)884104$$aPSI-FELLOW-III-3i - International, Interdisciplinary & Intersectoral Postdoctoral Fellowships at the Paul Scherrer Institut (884104)$$c884104$$fH2020-MSCA-COFUND-2019$$x2
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000613928 650_7 $$2Other$$aMaterials Science (cond-mat.mtrl-sci)
000613928 650_7 $$2Other$$aData Analysis, Statistics and Probability (physics.data-an)
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000613928 7001_ $$0P:(DE-HGF)0$$aMalamud, Florencia$$b1
000613928 7001_ $$0P:(DE-H253)PIP1088525$$aModregger, Peter$$b2
000613928 7001_ $$0P:(DE-H253)PIP1090441$$aWildeis, Anna$$b3
000613928 7001_ $$0P:(DE-H253)PIP1090419$$aHartmann, Markus$$b4
000613928 7001_ $$0P:(DE-H253)PIP1090305$$aBrandt, Robert$$b5
000613928 7001_ $$0P:(DE-H253)PIP1010429$$aMenzel, Andreas$$b6
000613928 7001_ $$0P:(DE-H253)PIP1085791$$aLiebi, Marianne$$b7
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