Full-field Bragg coherent diffraction imaging of large poly-crystal grains

We propose full-field coherent diffraction measurements of polycrystal grains at a high beam energy, with the long-term goal of characterizing crystalline deformation across many length scales. We will exploit the enhanced beam coherence of the ESRF-EBS at high energies to make a combined DCT/BCDI measurement at 33 keV. This will be a vital first step in developing a general capability to study crystalline materials simultaneously on multiple length scales varying from ~10 nm to ~10 um. A successful reconstruction will enable BCDI feasibility studies for large crystals, addressing issues like absorption and refraction. It will also bridge a critical gap in length scales currently separating coherence-based techniques like BCDI from conventional high-energy methods like DCT and HEDM. Unifying these so-far separate characterization methods is crucial for future multi-scale synchrotron studies of polycrystals and grain boundary interactions.