Practical methods for the measurement of spatial coherence-A comparative study

C. Maunders, C. Dwyer, P. C. Tiemeijer, J. Etheridge

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Two new methods for the measurement of transverse spatial coherence in a transmission electron microscope (TEM) are developed and applied to measure the spatial coherence in a field emission gun TEM. Measurements are made under different illumination and operating conditions, illustrating the effect of these conditions on the spatial coherence. The relative merits and limitations of these methods are discussed and compared, together with the previously described "Ronchigram" method.

Original languageEnglish (US)
Pages (from-to)1437-1446
Number of pages10
JournalUltramicroscopy
Volume111
Issue number8
DOIs
StatePublished - Jul 1 2011
Externally publishedYes

Keywords

  • Coherence
  • HRTEM
  • STEM
  • Source size

ASJC Scopus subject areas

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

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