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APT

Reconstruction,
chemistry and
confidence.

How atom probe data is reconstructed, where artifacts come from, and how to judge whether a composition trend is real.

APT
Start here

New to APT? Read these first.

StoryThe Needle That Remembered

A scrolling illustrated story about APT, and the finale of the case: a needle carved from bar B's grain boundary,…

GuideInstrument, Prep & Applications

Voltage-pulsed versus laser-pulsed atom probe, FIB lift-out and annular milling of a site-specific needle,…

All topics

Field evaporation & the instrument1 page
GuideInstrument, Prep & ApplicationsVoltage-pulsed versus laser-pulsed atom probe, FIB lift-out and annular milling of a site-specific needle,…Foundation · 12 min
Reconstruction2 pages
GuideReconstruction & ResolutionHow an atom probe turns detector hits into a 3-D map of atoms: trajectory aberrations and local magnification…Advanced · 14 minLabCorrelative APT and TEMFollow one atom probe needle through FIB lift-out, TEM or TKD and the atom probe, and see how the tip radius…Advanced · 12 min
Data analysis2 pages
GuideData & AnalysisUntangling an atom probe mass spectrum: peak overlaps and isotopic deconvolution, iso-concentration surfaces…Advanced · 14 minLabDetecting Short-Range Order with APTBuild a crystal with short-range order, pass it through a model atom probe, and watch detection efficiency…Advanced · 12 min
From other chapters1 page
GuideFIB Specimen Prep: What the Beam DoesFive questions about FIB prep, answered on real Helios images: how deep gallium damage goes, what causes…Advanced · 15 min
Troubleshooting1 page
FAQAPT Troubleshooting FAQTroubleshooting FAQ for atom probe tomography: trajectory aberrations and local magnification, mass-spectrum…Advanced · 15 min

Other chapters: TEM · EBSD · Structure & Transformations · Contact Mechanics · Mechanical Behavior · In-situ Testing.