Introduction to the program MWP-fit
MWP-fit is a computer program developed for the determination of microstructural
parameters from diffraction profiles of materials with cubic or hexagonal
crystal lattice. The measured profiles or their
Fourier transforms are fitted by ab-initio theoretical functions for
size and strain broadening. In the calculation of the theoretical functions
it is assumed that the crystallites have lognormal size distribution
and the strain is caused by dislocations. Strain and size anisotropy is
taken into account by the dislocation contrast factors and the ellipticity
of crystallites. The fitting procedure provides the median and the variance
of the size distribution and the ellipticity of crystallites, and the
density and arrangement of dislocations.
A similar procedure has been recently developed, called the method of
Convolutional Multiple Whole Profile
fitting, which is more sophisticated compared to the MWP method, so you
should use the CMWP method
when possible.