Practical Aspects of CBED Specimen Preparation and Operation in the TEM

2 Practical Aspects of CBED Specimen Preparation and Operation in the TEM 

The normal procedures for obtaining CBED patterns are described in [21-23] and here are summarized in the following steps  

Insert the selected area diffraction aperture, focus the image and switch the diffraction mode. Thus, a conventional SADP is obtained as starting point for the next operations. 

Focus the pattern by using the intermediate lens and C2 lens control and remove the selected area and objective apertures. Return to the image mode. 

Insert a small C2 condenser aperture and focus the shadow image of the aperture with the objective lens the image will then go out of focus. 

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