60 https://www.uni-bremen.de/mapex-cf/instrumentation/3d-materials-analytics/walk-in-x-ray-radiation-protection-cabin This page contains information about the walk-in X-ray radiation protection cabin with integrated experimental platform. de Universität Bremen Thu, 18 Jun 2026 16:17:23 +0200 Thu, 18 Jun 2026 16:17:23 +0200 Universität Bremen content-664408 Fri, 06 Mar 2026 14:17:53 +0100 https://www.uni-bremen.de/mapex-cf/instrumentation/3d-materials-analytics/walk-in-x-ray-radiation-protection-cabin#c664408 <ul> <li>Investigation area: <a href="https://www.uni-bremen.de/en/mapex-cf/instrument-database/list/area/1?cHash=d84491fa6238940586396c9e904682a8">3D and 4D Materials Analytics</a></li> <li>Techniques X-ray computed tomography / Talbot-Lau grating interferometer</li> <li>Manufacturer PROCON</li> <li>Fabrication year 2024</li> <li>Supported by Federal Ministry for Economic Affairs and Climate Action; INNO-KOM IZ240042; IZ190032</li> <li>Measured quantity: 3D-shape; defects; interfaces; volume</li> <li>Main application: <ul> <li>Non-destructive testing (NDT) of metals, compound materials, opto-electronic components, etc.</li> <li>Testing and research platform for X-ray applications</li> <li>4D Experiments</li> </ul> </li> </ul> Content content-664409 Fri, 06 Mar 2026 14:17:53 +0100 https://www.uni-bremen.de/mapex-cf/instrumentation/3d-materials-analytics/walk-in-x-ray-radiation-protection-cabin#c664409 <ul> <li>Technical aspects <ul> <li>flat-panel detector; detector size 140 x 120 mm</li> <li>read-out rate at least 40 fps </li> <li>measuring field extension to 280 x 240 mm (max. component size 250 x 220 mm)</li> </ul> </li> <li>Microfocus x-ray tube - 150 kV / 75 W, > 3 µm resolution</li> <li>Additional measurement possibilities</li> </ul> <p>Talbot-Lau grating interferometer</p> Content content-664403 Fri, 06 Mar 2026 14:17:53 +0100 https://www.uni-bremen.de/mapex-cf/instrumentation/3d-materials-analytics/walk-in-x-ray-radiation-protection-cabin#c664403 <p>This advanced, grating-based X-ray technology enables multiple contrast modes to be acquired in a single scan. It combines absorption contrast (AC), differential phase contrast (DPC) and dark-field contrast (DFC) to generate detailed, complementary information about the internal structure of a sample. Absorption contrast visualizes the attenuation of X-rays by dense materials, while differential phase contrast improves the visibility of interfaces and subtle density differences. Dark field contrast is highly sensitive to small-angle scattering caused by microstructural features such as cracks, voids and fiber networks. Together, these contrasts allow researchers to detect fine defects and anomalies that remain invisible in conventional CT imaging. The technique also significantly increases contrast when examining materials with very low (e.g. carbon fiber vs. matrix) or very high (e.g. metal insert vs. FRP) density variance. So that the limitations of conventional X-ray CT can be overcome.</p> Content content-664405 Fri, 06 Mar 2026 14:17:53 +0100 https://www.uni-bremen.de/mapex-cf/instrumentation/3d-materials-analytics/walk-in-x-ray-radiation-protection-cabin#c664405 <p>The interferometer's design integrates three precision gratings, where the first grating (G0) creates spatial coherence of the X-ray beam, the second grating (G1) functions as a phase grating producing periodic phase shifts, and the third grating (G2) acts as an analyser grating that samples the resulting interference pattern arranged along the optical axis to generate interference patterns that are computationally reconstructed into high-fidelity volumetric images. Phase stepping is achieved by translating the analyser grating (G2) perpendicular to the X-ray beam, which allows measurement of phase shifts across multiple positions. This approach leverages the Talbot effect, where periodic gratings form self-images at defined distances behind the grating.</p> Content content-664411 Fri, 06 Mar 2026 14:17:53 +0100 https://www.uni-bremen.de/mapex-cf/instrumentation/3d-materials-analytics/walk-in-x-ray-radiation-protection-cabin#c664411 <ul> <li>Group  FIBRE</li> <li>Building  IW 3</li> <li>Room 0300</li> </ul> <p><a class="download-link" href="t3://file?uid=187828" target="_blank" title="Leitet Herunterladen der Datei ein">Additional information as PDF</a></p> Content content-664412 Fri, 06 Mar 2026 14:17:53 +0100 https://www.uni-bremen.de/mapex-cf/instrumentation/3d-materials-analytics/walk-in-x-ray-radiation-protection-cabin#c664412 <p><strong>Application scientist</strong></p> <p>Oliver Focke (e-mail: <a href="mailto:focke@faserinstitut.de">focke@faserinstitut.de</a>)</p> <p>FIBRE<br /> IW 3<br /> Phone number 218-58655</p> <p><strong>Principal investigator</strong></p> <p>Prof. Dr.-Ing. David May (e-mail: <a class="e-mail-link" href="mailto:may@faserinstitut.de" title="Öffnet ein Fenster zum Versenden der E-Mail">may@faserinstitut.de</a>)</p> Content