Fundamentals of Convergent Beam Electron Diffraction.

Abstract

Fundamentals of convergent-beam electron diffraction (CBED) are described. First, the CBED method is explained and an obtained CBED pattern is shown. Then, it is described what kind of crystal- lographic information can be obtained by the CBED method. The char- acteristic profiles of higher order Laue zone (HOLZ) reflections are explained by the dynamical diffraction effect. The large angle (LACBED) technique and its application to identify the types of dis- locations are given. The coherence effect appearing at the overlap- ping regions of two CBED disks is explained.