  When an X-ray is incident onto the silicon absorber array of a detector, it
liberates a large number of electrons, which tend to diffuse outward into what
is referred to as the charge cloud. This number can vary from tens to thousands
across the soft X-ray bandpass (0.1 - 10 keV). The charge cloud can then be
picked up by several pixels, and forms a specific pattern based on the exact
incident location of the X-ray. We present experimental results on subpixel
resolution for a custom H2RG with 36 micron pixels, presented in Bray 2018, and
compare the data to simulated images . We then apply the model simulation to a
prototype small pixel hybrid CMOS detector (HCD) that would be suitable for the
Lynx X-ray surveyor. We also discuss the ability of a small pixel detector to
obtain subpixel resolution.
