Preview: Forthcoming article in Journal of Applied Crystallography
Forthcoming article in Journal of Applied Crystallography
Journal of Applied Crystallography covers a wide range of crystallographic topics from the viewpoints of both techniques and theory. The journal presents articles on the application of crystallographic techniques and on the related apparatus and computer
Reconstruction of the near-field distribution in X-ray waveguide array
Multi-waveguide interference can be verified experimentally by reconstructing the near-field from the measured far-field diffraction pattern. This enables a direct visualization of the near-field interference pattern and the diversity of fields which can be created by multi-waveguide design, in particular a secondary quasi-focal spot. Numerical propagation using the design parameters is compared to the phase retrieval results.
Bayesian approach to powder phase identification
A Bayesian approach to formulation of a search–match strategy for powder phase identification is proposed. Even for a simple exponential model of prior probabilities the approach provides good agreement with known results for several testing examples.
Robust X-ray angular correlations for the study of meso-structures
The theoretical limitations and experimental challenges of X-ray angular correlation analysis methods are investigated. Using a combination of simulated data and measurements on challenging meso-cluster samples, prepared using lithography and self-assembly, the primary experimental challenges are explored. Background scattering, data masking and inter-object interference are identified as primary challenges. Strategies to overcome correlation artifacts are presented.