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Reflections on the Projection of Ions in Atom Probe Tomography

Published online by Cambridge University Press:  02 February 2017

Frédéric De Geuser  and
Baptiste Gault Open the ORCID record for Baptiste Gault [Opens in a new window]
Frédéric De Geuser
Affiliation:
Université Grenoble Alpes, SIMAP, F-38000 Grenoble, France CNRS, SIMAP, F-38000 Grenoble, France
Baptiste Gault*
Affiliation:
Max-Planck Institut für Eisenforschung, Max-Planck-Straße 1, D-40237 Dsseldorf, Germany
*
* Corresponding author. b.gault@mpie.de
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Abstract

There are two main projections used to transform, and reconstruct, field ion micrographs or atom probe tomography data into atomic coordinates at the specimen surface and, subsequently, in three dimensions. In this article, we present a perspective on the strength of the azimuthal equidistant projection in comparison with the more widely used and well-established point projection (or pseudo-stereographic projection), which underpins data reconstruction in most software packages currently in use across the community. After an overview of the reconstruction methodology, we demonstrate that the azimuthal equidistant is more robust with regards to errors on the parameters used to perform the reconstruction and is therefore more likely to yield more accurate tomographic reconstructions.

Keywords

atom probe tomographyfield ion microscopytomographic reconstructionprojection
Type
Reconstruction
Information
Microscopy and Microanalysis , Volume 23 , Special Issue 2: Atom Probe Tomography & Microscopy 2016 , April 2017 , pp. 238 - 246
Copyright
© Microscopy Society of America 2017 

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