DASAPT

What it calibrates

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

Iso-surface sweep

Sweep the upper limit from a low value to a high value. The first pass is computed and then replayed. Step size is settable, and the sweep can be saved as GIF or MP4.

Iso-surface upper-limit sweep
Upper-limit sweep of a concentration iso-surface

Volume map

Map concentration, density, peak ratio, or multiplicity through the reconstructed volume. Several saved maps can be shown together.

Volume map of a reconstructed APT needle
Volume map on a reconstructed needle

Slicing

Move a slice through the reconstructed volume to see the atoms inside the needle.

Slice through a reconstructed APT needle
Slice through a reconstructed needle

Atomic stacking

Continuous stack grows the tip layer by layer along X, Y, or Z. Atoms already shown stay on screen, and iso surfaces and volume maps are clipped with the stack. Optional rotation follows the specimen axis.

Atomic stacking along the specimen in DASAPT
Continuous stack with concentration overlays

Cylinder 1D profile

Place a cylinder ROI on the 3D reconstruction and measure composition along its axis. Requires reconstructed XYZ. Open it from the toolbar in Cluster Analysis or DAS APT.

Cylinder 1D concentration profile
Cylinder 1D profile in APT Calibrator

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 kf, 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 kf. 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}
}