4D STEM with a direct electron detector
· There are two principal types of direct electron detector that have been used for 4D STEM applications, and both types have different strengths and weaknesses. A hybrid pixel array detector (PAD) [6, 7] consists of an array of wide, thick pixels (e.g. 150 x 150 x 500 µm for the electron microscope pixel array detector (EMPAD) described in Ref ...