X-ray diffraction tomography dataset of archaeological ceramic

This dataset contains a subset of processed data that was acquired using X-ray diffraction tomography (XRD-CT) at the ID15A beamline at the European Synchrotron (ESRF), Grenoble, France. The imaged object is an archaeological ceramic, whose fragments are kept at the University of Milan.

High-energy X-ray diffraction measurements were taken at the ID15A beamline using a monochromatic pencil beam (90 keV energy). Data was collected of 3 horizontal slices, spaced 7 mm apart, and acquisition of each slice took 20 minutes. Acquisition was performed in 273 translation steps over a scan range of 12 mm and in 225 rotational steps over an angular range of 180 degrees. Sinograms were computed from the acquired images using the pyFAI library. A subset of the sinograms was selected, containing 3 horizontal slices with 11 channels each.

The provided HDF5 file contains two subdatasets:

- omega: 225 elements
 - rotation angle in degrees
- sinograms: 11 x 3 x 225 x 273 elements
 - 11 channels (corresponding to diffraction angle)
 - 3 horizontal slices
 - 225 rotation angles
 - 273 horizontal pixels