Fig. 1

The PRISM algorithm. a The sample’s atomic coordinates are divided up into slices. b The projected potential of each slice is computed. c Each required plane wave is calculated by using the multislice algorithm to propagate the wave through the sample. d The complex coefficients for each probe are calculated for the interpolated/cropped coordinate system, and then e each wave is multiplied by the associated coefficient and summed to generate the probe. f Final probe wave is typically Fourier transformed and is either output as a CBED intensity or virtual detectors are used to add up subsets of the wave intensity