Multiple Pole Figure Extraction from Pulsed White Beam Angle-Dispersive Neutron Diffraction Data

White beam from 25 - pole wiggler

Diffraction-free and dispersion-free pulsed beam propagation in dispersive media.

The diffraction of pulsed beams of light is formulated as an anomalously dispersive phenomenon. In a dispersive material, the effects of material group-velocity dispersion and diffraction on pulsed beam propagation can mutually cancel if the transverse profile of the pulse is suitably chosen.

Neutron Reflectivity and Grazing Angle Diffraction

Over the last 10 years, neutron reflectivity has emerged as a powerful technique for the investigation of surface and interfacial phenomena in many different fields. In this paper, a short review of some of the work on neutron reflectivity and grazing-angle diffraction as well as a description of the current and planned neutron rcflectometers at NIST is presented. Specific examples of the chara...

CAESAR: A Technique for Angle-Dispersive Powder Diffraction Using an Energy- Dispersive Setup and White Synchrotron Radiation

Introduction We describe a new diffraction technique for Combined Angleand Energy-dispersive Structural Analysis and Refinement (CAESAR), which collects angle-dispersive data by scanning a solid-state detector (SSD) with white synchrotron radiation. We demonstrate the feasibility by analyzing data collected on αAl2O3 at ambient conditions using the Rietveld technique, with varying schemes of da...

Far-field diffraction of pulsed optical beams in dispersive media

Ž . Propagation of a pulsed optical beam a train of ultrashort optical pulses inside a linear dispersive medium is studied in the far field without making the paraxial approximation. This approach permits us to obtain analytical results that are valid for relatively large diffraction angles. Pulse characteristics are found to be affected considerably by the combination of diffraction and disper...