Fig. 6: Compton scattering profile.

a Detector signal in the upper detector without a sample in place, with counts ranging from 0 (black) to 2 × 10−4 counts/pixel/ms (white). b Detector signal from the rim of the silicate diatom sample shown in Fig. 4c, after subtracting the no-sample map, with counts ranging from 0 (black) to 8 × 10−5 counts/pixel/ms (white). Contours of constant θ are shown. c Computed detector signal, scaled to the same maximum counts as (b). d Line out of the detector signal along the orange dashed lines of (b) and (c)