T2 - Diffraction contrast

WG Leaders: Wolfgang Ludwig and Søren Schmidt

This Working Group is focused on the specific, and highly nonlinear reconstruction problems in diffraction contrast tomography. As the direction of the diffracted beam depends on only on the direction of the incoming beam, but also on the crystal orientation of the sample itself, the geometrical parameters of the imaging formation must be determined as part of the reconstruction.

Research tasks for this Working Group include:
(a) Developing algorithms for accurate sorting of (possibly overlapping) diffraction spots to link them to individual grains.
(b) Developing algorithms for fast reconstruction of polycrystalline samples if the grain lattice structure is undeformed.
(c) Developing algorithms for simultaneous computation of grain boundaries, deformation and strain in polycrystalline samples.