Multiple beam scattering in electron diffraction

This lecture explores the phenomenon of multiple beam scattering in electron diffraction, focusing on how a zone axis diffraction pattern can give rise to scattering of multiple diffracted beams simultaneously. The instructor presents a theoretical approach to understand this complex process, using examples such as diffraction from a Si crystal and constructing zone axis diffraction patterns aligned with specific crystallographic directions. The lecture also discusses the analogy of diffraction grating in Fraunhofer far-field geometry and the Ewald sphere/reciprocal lattice representation to explain the scattering behavior. By the end, a summary is provided, emphasizing the high symmetry zone axis diffraction pattern and the scattering from multiple planes around the (000) direction.