Texture tomography – Establishing spatial and angular resolution limits with a multi-texture 3D resolution chart

The crystallographic texture is a key organization feature of many technical (steel, concrete, ceramics or energy materials) and biological materials (bone, teeth, wood, tendon). To determine the crystallographic texture of such materials in 3D we are developing Texture tomography (TexTom) based on the previously established technique of X-ray small-angle scattering tensor tomography (SASTT) and its transfer to diffraction. TexTom differs from SASTT as it uses a projection model, which uses all available reflections in the diffraction pattern and not just a single q-range, as SASTT does. We propose to deploy this technique at ID15A and study the attainable real and reciprocal space resolution on a custom-designed texture test pattern. In this way, we will obtain ground truth data before the technique finds wider application on biomaterials such as the bone-tendon enthesis or technical materials such as fibre reinforced polymers.