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X-ray transparent coreholders are used in X-ray scanners and tomographs to study core saturation. There are different design versions to apply either 2D or 3D compression of core.
The coreholder design is a Hussler tube with pressure outlet ports along the core. The outer housing is a dural tube wrapped with carbon and glass fiber. In a linear scanner, unlike tomographs, 4 additional metal pins are used for axial pressure compensation to reduce the walls of the dural tube.
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