Heiney, Paul A.
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Publication 1.4 - Crystal Structure(2016-03-29) Heiney, Paul A.The relationship between macroscopic shape and atomic-level structure of crystals. Lattice types, space groups, basis. Time 5:51.Publication 2.4 - Collimation Optics(2016-04-20) Heiney, Paul A.Approaches to producing collimated, monochromatic beams: pinholes, slits, monochromators, filters, mirrors, confocal optics. Goniometers for orienting samples. Time 7:42.Publication 7.2 - Electron Diffraction(2016-08-25) Heiney, Paul A.Wave nature of the electron. The transmission electron microscope. Comparison of electrons, X-rays for diffraction. Low energy electron diffraction (LEED). Time 5:19.Publication 3.8 - Limitations to X-ray Crystallography(2016-07-25) Heiney, Paul A.Limitations of crystallography due to: powder samples, finite angular range, the phase problem. Common solutions to these problems. Time 7:02.Publication 2.6 - The Multi-Angle X-ray Scattering Facility at the University of Pennsylvania(2016-07-19) Heiney, Paul A.A detailed description of the MAXS facility at Penn: rotating anode generator, confocal optics and pinholes, area detector, computer automation. Time 4:31.Publication 3.6 - Some Simple Lattices(2016-07-24) Heiney, Paul A.Review of reciprocal lattice. Cubic lattices and hexagonal lattice and their reciprocal lattices. Time 11:09.Publication 3.2 - Some Fourier Transforms in One Dimension(2016-07-20) Heiney, Paul A.Examples of Fourier transforms (that are relevant to X-ray scattering): Fourier transforms of box function, Gaussian, sum of Gaussians. General features of Fourier transforms. Time 9:36.Publication 3.4 - Crystal Structure, the Lattice, and the Basis(2016-07-23) Heiney, Paul A.Review of crystal structure, lattice, and basis. Calculating the Fourier transform of the electron structure. Atomic form factor and reciprocal lattice. Time 8:30Publication 6.2 - Thin Film Reflectivity(2016-08-15) Heiney, Paul A.Reflection from thin films on a substrate result in oscillations called Kiessig fringes. Calculation of reflectivity from multiple or graded interfaces. Examples of reflectivity profiles from thin films on silicon or water. Time 5:10Publication 3.1 - Sines, Cosines, and Fourier Transforms(2016-07-19) Heiney, Paul A.The use of trigonometric functions in describing electromagnetic waves. Fourier transforms and waves with multiple frequencies present. The Euler formulation of sines and cosines as exponentials. Time 7:35.