Journal Article

PUBDB-2025-01084

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Texture tomography with high angular resolution utilizing sparsity

Carlsen, M. (Corresponding author)Extern* ; Malamud, F. ; Modregger, P.Extern*DESY* ; Wildeis, A.Extern* ; Hartmann, M.Extern* ; Brandt, R.Extern* ; Menzel, A.Extern* ; Liebi, M.Extern*

2024
Munksgaard Copenhagen

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Please use a persistent id in citations: doi:10.1107/S1600576725001426  doi:10.3204/PUBDB-2025-01084

Report No.: arXiv:2407.11022

Abstract: We 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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Contributing Institute(s):

1. FS-PETRA (FS-PETRA)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. PSI-FELLOW-III-3i - International, Interdisciplinary & Intersectoral Postdoctoral Fellowships at the Paul Scherrer Institut (884104) (884104)
4. SWEDEN-DESY - SWEDEN-DESY Collaboration (2020_Join2-SWEDEN-DESY) (2020_Join2-SWEDEN-DESY)

Experiment(s):

1. PETRA Beamline P21.2 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Carlsen, M. (Corresponding author)Extern* ; Malamud, F. ; Modregger, P.Extern*DESY* ; Wildeis, A.Extern* ; Hartmann, M.Extern* ; Brandt, R.Extern* ; Menzel, A.Extern* ; Liebi, M.Extern*
Texture tomography with high angular resolution utilizing sparsity
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