Estimation of the reconstruction parameters for Atom Probe Tomography

TL;DR

This paper introduces a self-consistent method for accurately estimating key parameters in atom probe tomography reconstruction, improving volume accuracy by leveraging geometrical projections and Fourier analysis.

Contribution

A novel systematic approach for determining reconstruction parameters in atom probe tomography using geometrical and Fourier methods.

Findings

Significant improvement in reconstruction accuracy.

Effective estimation of detector efficiency.

Enhanced reliability of 3D reconstructions.

Abstract

The application of wide field-of-view detection systems to atom probe experiments emphasizes the importance of careful parameter selection in the tomographic reconstruction of the analysed volume, as the sensitivity to errors rises steeply with increases in analysis dimensions. In this paper, a self-consistent method is presented for the systematic determination of the main reconstruction parameters. In the proposed approach, the compression factor and the field factor are determined using geometrical projections from the desorption images. A 3D Fourier transform is then applied to a series of reconstructions and, comparing to the known material crystallography, the efficiency of the detector is estimated. The final results demonstrate a significant improvement in the accuracy of the reconstructed volumes.