DASAPT · Düsseldorf APT Suite

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What it calibrates

Default reconstruction parameters are rarely sufficient. APT Calibrator collects methods developed over two decades into one interface.

Image compression factor

ICF (ξ) from crystallographic poles on detector hit maps, using theoretical versus observed inter-pole angles. At least two indexed poles are required.

Field factor k_f

Iterative radius refinement from lattice-plane spacing, then k_f from F = V / (k_f R). Complements spatial distribution maps in AP Suite.

Pole-figure simulator

Azimuthal equidistant projection, closer to APT geometry than gnomonic EBSD-style indexing. Supports LEAP 5000 XS/XR, TKD/EBSD orientations, and grain misorientation.

Golden-seed reconstruction

Fiducial markers from TEM/STEM used for depth-resolved ICF and k_f. Useful when poles are weak, or for multilayers, precipitates, and nanocrystalline specimens.

Two ways to use it

Export from AP Suite, calibrate here, then return parameters or a reconstructed volume.

Standard calibration

Build detector hit maps and spatial distribution maps in AP Suite. Index poles and iterate radius in APT Calibrator to obtain ICF and k_f, then reapply them in the reconstruction wizard.

Correlative dynamic reconstruction

Export .apt to .epos, place golden seeds on matching TEM/STEM features, and compute depth-dependent ICF and k_f. Reconstructions can be written as .pos files back into AP Suite.

Cite the software

If you use APT Calibrator in published work, please cite the paper.

Xinren Chen, Yue Li, Eric Woods, Xuyang Zhou, and Baptiste Gault. APT Calibrator: A Multifunctional C# Software Application for Reconstruction Calibration in Atom Probe Tomography. Microscopy and Microanalysis 31, ozaf092 (2025). https://doi.org/10.1093/mam/ozaf092

@article{Chen2025APTCalibrator,
  author  = {Chen, Xinren and Li, Yue and Woods, Eric and Zhou, Xuyang and Gault, Baptiste},
  title   = {{APT Calibrator}: A Multifunctional {C\#} Software Application for Reconstruction Calibration in Atom Probe Tomography},
  journal = {Microscopy and Microanalysis},
  volume  = {31},
  number  = {5},
  pages   = {ozaf092},
  year    = {2025},
  doi     = {10.1093/mam/ozaf092}
}

Source on GitHub

Düsseldorf APT Suite