DEVELOPMENT OF DIRECT METHODS OF DATA INVERSION IN HELIUM ATOM SCATTERING

The problem of diffraction pattern deconvolution in Helium Atom Scattering (HAS) has been solved directly within the Eikonal approximation. A formulation based on the Patterson construction has been developed which reduces the problem to the solution of a set of simultaneous equations in {ζj}, where ζj are the corrugation parameters for the surface. The formulation returns real space structures that satisfy unitarity, a secondary problem in HAS diffraction image inversion. Numerical benchmarks of this procedure are presented.