A simple channelling model for HREM contrast transfer under dynamical conditions

W. Sinkler*, L. D. Marks

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The application of electron channelling theory to dynamical exit wave calculations is briefly reviewed, and a comparison of channelling results with full dynamical calculations is presented. The channelling expression to the exit wave is combined with conventional imaging theory, and it is shown that a simple expression can be obtained for a dynamical contrast transfer function (D-CTF), which incorporates imaging aberrations and thickness- dependent dynamical scattering effects. The D-CTF can provide detailed insight into HREM images of a mixed cation oxide at thicknesses up to 200A, whereby an approximate correction for non-linear effects is utilized in the larger thickness regime.

Original languageEnglish (US)
Pages (from-to)112-123
Number of pages12
JournalJournal of Microscopy
Volume194
Issue number1
DOIs
StatePublished - 1999

Keywords

  • Dynamical diffraction theory
  • Electron channelling
  • HREM imaging theory

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology

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