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

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

Research output: Contribution to journalArticle

29 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 2011
Externally publishedYes

    Fingerprint

Keywords

  • Coherence
  • HRTEM
  • Source size
  • STEM

ASJC Scopus subject areas

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

Cite this