A dynamical theory calculation, based on Bloch wave expansion, is developed to explain spin-scho resolved grazing incidence scattering measurements on a diffraction grating. The theory provides a detailed description of the scattering process and the behavior of the neutron wavefunction in the vicinity of the grating.

A method for adapting spin echo scattering angle measurement to time-of-flight neutron sources is developed, tested and compared with traditional small-angle neutron scattering.