Journal of Applied Crystallography

Volume 40, Part 3 (June 2007)

research papers

J. Appl. Cryst. (2007). 40, 570-579 [ doi:10.1107/S0021889807019711 ]

Orientation density function-controlled pole probability density function measurements: automated adaptive control of texture goniometers

H. Schaeben, R. Hielscher, J.-J. Fundenberger, D. Potts and J. Prestin

Abstract: A novel control of a texture goniometer, which depends on the texture being measured itself, is suggested. In particular, it is suggested that the obsolete control with constant step sizes in both angles is replaced by an adaptive successive refinement of an initial coarse uniform grid to a locally refined grid, where the progressive refinement corresponds to the pattern of preferred crystallographic orientation. The prerequisites of this automated adaptive control is the fast inversion of pole intensities to orientation probabilities in the course of the measurements, and a mathematical method of inversion that does not require a raster of constant step sizes and applies to sharp textures.

Keywords: texture analysis; radial basis functions; pole figures; pole density functions; orientation density functions; pole-to-orientation density inversion.