Scanning microscopes employing neutral particle probes can offer advantages over charged-particle microscopes for some measurements and may also enable entirely new spectroscopic tools. The required focusing neutral-particle optics are however far less developed than the electron optics of scanning electron microscopes (SEM). Here we present calculations for a proposed neutral-particle "magnetostatic aperture lens" as an example of how it is possible to quite generally adapt the cylindrically symmetric charged-particle optics such as those used in SEM, to neutral particles including neutrons and neutral atoms and molecules for use in possible scanned neutral-particle microscopes.
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