3D X-ray Computed Tomography (3D X-ray CT)
To plan a CT experiment with our scanner, please use the following interactive user interface: https://xct-explorer-v1.streamlit.app/(1)
Technical Specifications
Application
Sample Requirements
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3D image of a REE (red) bearing carbonate rock (~15 cm diameter) Foto: J.R.A. Godinho(2) |
Particles (<1 mm) from the same rock (left), after comminution Foto: J.R.A. Godinho(3) |
EXCITE Project
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The project brings together on a European scale key national and regional electron and X-ray microscopy facilities to European researchers, from both academia and industry, ensuring their optimal use and joint development. To meet these aims, the project combines:
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Selected Publications ►
- Spectral Tomography for 3D Element Detection and Mineral Analysis, Minerals, 11, 2021. 10.3390/min11060598(5)
- 3D quantitative mineral characterization of particles using X-ray computed tomography. Natural Resources Research 32 (2), 479-499. 10.1007/s11053-023-10169-5(6)
- Integration of X-ray radiography and automated mineralogy data for the optimization of ore sorting routines Minerals Engineering 186, 107739. 10.1016/j.mineng.2022.107739(7)
How does it work? ►
The materials inside a sample are imaged based on the principle that each material attenuates X-rays differently, depending on its electron density. Radiographs are acquired while rotating the sample (360 degrees). The samples are then computationally reconstructed into a 3D image of the sample. Normal detectors measure the total amount of X-rays (of all energies), while our special energy sensitive detector allows to resolve the energy spectrum. This helps to identify elements with a k-edge > 23 keV (heavier than Ru).
Important to plan a scan: The resolution is inversely proportional to the field of view. Samples < 2 cm diameter are necessary to achieve the highest resolution (~4 um). Cylindrical samples are ideal but other geometries can be measured without any special treatment. The method is non-destructive.
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URL of this article
https://www.hzdr.de/db/Cms?pOid=56212