XXL-CT, unique CT capabilities for industrial applications

The increase of Computed Tomography (CT) as an applicable non destractive testing (NDT) an detrology method awakes interest on expanding the application fields, which were rarely used in the past due to their requirements on the imaging system. Especially the classical X-ray generation techniques based on bipolar high voltage (HV) supplies restricted the application fields of CT to typical material penetration lengths of only a few cm of steel. Even with accelerator technology that offers a suitable way to overcome these restrictions just the 2D radioscopy technique found aIdespread application. Beside the production and detection of photons in the MeV ränge itself, the achievable image quality is limited using Standard detectors due to the dominating absorption effect of Compton Scattering at high energies. Especially for CT reconstruction purposes these effects have to be considered on the development path from classical 2D radioscopyto 3D imaging. Most High Energy CT applications are therefore based on line detectors shielding scattered radiation to a maximum with an increase in imaging quality but with time consuming large volume scan capabilities. In this contribution we present the High-Energy X-ray Imaging project at Fraunhofer Development Centre for X-ray Technology with regard to the potential of the CT-system stage according to metrological and other application capabilities.