A computational geometry framework for the optimisation of atom probe reconstructions

Felfer P, Cairney J (2016)


Publication Status: Published

Publication Type: Journal article

Publication year: 2016

Journal

Publisher: Elsevier

Book Volume: 169

Pages Range: 62-68

DOI: 10.1016/j.ultramic.2016.07.008

Abstract

In this paper, we present pathways for improving the reconstruction of atom probe data on a coarse ( > 10 nm) scale, based on computational geometry. We introduce a way to iteratively improve an atom probe reconstruction by adjusting it, so that certain known shape criteria are fulfilled. This is achieved by creating an implicit approximation of the reconstruction through a barycentric coordinate transform. We demonstrate the application of these techniques to the compensation of trajectory aberrations and the iterative improvement of the reconstruction of a dataset containing a grain boundary. We also present a method for obtaining a hull of the dataset in both detector and reconstruction space. This maximises data utilisation, and can be used to compensate for ion trajectory aberrations caused by residual fields in the ion flight path through a 'master curve' and correct for overall shape deviations in the data. (C) 2016 Elsevier B.V. All rights reserved.

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APA:

Felfer, P., & Cairney, J. (2016). A computational geometry framework for the optimisation of atom probe reconstructions. Ultramicroscopy, 169, 62-68. https://dx.doi.org/10.1016/j.ultramic.2016.07.008

MLA:

Felfer, Peter, and Julie Cairney. "A computational geometry framework for the optimisation of atom probe reconstructions." Ultramicroscopy 169 (2016): 62-68.

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