Sparse recovery of undersampled intensity patterns for coherent diffraction imaging at high X-ray energies.

ABSTRACT: Coherent X-ray photons with energies higher than 50 keV offer new possibilities for imaging nanoscale lattice distortions in bulk crystalline materials using Bragg peak phase retrieval methods. However, the compression of reciprocal space at high energies typically results in poorly resolved fringes on an area detector, rendering the diffraction data unsuitable for the three-dimensional reconstruction of compact crystals. To address this problem, we propose a method by which to recover fine fringe detail in the scattered intensity. This recovery is achieved in two steps: multiple undersampled measurements are made by in-plane sub-pixel motion of the area detector, then this data set is passed to a sparsity-based numerical solver that recovers fringe detail suitable for standard Bragg coher

SUBMITTER: Maddali S 

PROVIDER: S-EPMC5862902 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature