Model Validation for Scanning Electron Microscopy

We are beginning projects to validate the physics models used for interpretation of electron microscopy images. In one of them, we will measure electron yields and energy spectra from cleaned well-characterized samples subjected to electron bombardment inside of a spherical retarding field analyzer in ultra-high vacuum. In another, we will measure the same features, lithographically patterned on free-standing Si membranes, with measurement techniques that differ in their interaction physics. A modeling project will compare measurement results with simulations using existing and new models. Good models should predict the observed yields and produce agreement among measurement techniques.