Calculations of HREM image intensity using Monte Carlo integration

L. Y. Chang, R. R. Meyer, A. I. Kirkland

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We have developed a numerical approach for the accurate and efficient calculation of HREM image intensity formed using a partially coherent source. The approach is based on Monte Carlo integration, and is suitable for use in general image restoration methods using a series of images. The accuracy of this approach is compared with calculations based on the transmission cross coefficient (TCC) for strong scattering objects, as a function of the number of sampling points, defocus, atomic number and specimen thickness. Its efficiency is compared with that of exact TCC calculations based on equally-spaced sampling of the beam divergence and focal spread distributions. The results indicate that the Monte Carlo approach is particularly advantageous for nonlinear image restoration algorithms.

Original languageEnglish (US)
Pages (from-to)271-280
Number of pages10
JournalUltramicroscopy
Volume104
Issue number3-4
DOIs
StatePublished - Oct 1 2005
Externally publishedYes

Keywords

  • Exit wave reconstruction
  • High resolution transmission electron microscopy (HRTEM)
  • Image simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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