Indexing of superimposed Laue diffraction patterns using a dictionary-branch-bound approach.

ABSTRACT: X-ray Laue diffraction is an important method for characterizing the local crystallographic orientation and elastic strain in polycrystalline materials. Existing analysis methods are designed mainly to index a single or a few Laue diffraction pattern(s) recorded in a detector image. In this work, a novel method called dictionary-branch-bound (DBB) is presented to determine the crystallographic orientations of multiple crystals simultaneously illuminated by a parallel X-ray incident beam, using only the spot positions in a detector image. DBB is validated for simulated X-ray Laue diffraction data. In the simulation, up to 100 crystals with random crystallographic orientations are simultaneously illuminated. Fake spots are randomly added to the detector image to test the robustness of DBB. A

SUBMITTER: Seret A 

PROVIDER: S-EPMC9533744 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature