Berlin 2005 – wissenschaftliches Programm
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M: Metallphysik
M 32: Poster TU B (Symposium Tomographic Methods in Materials Research M-32.32-55)
M 32.32: Poster
Montag, 7. März 2005, 14:30–16:30, Poster TU B
NON-DESTRUCTIVE TESTING WITH NEUTRON PHASE CONTRAST IMAGING — •Klaus Lorenz1, Erich Steichele1, and Eberhard Lehmann2 — 1FRM-II, 85748 Garching, Germany — 2Paul-Scherrer-Institut, 5232 Villigen, Switzerland
At the NEUTRA facility (SINQ), a great variety of objects was investigated with phase contrast radiography, for instance metal foams and casted objects. The phase contrast effect is now well understood and great efforts are made to improve the existing setup and to exploit all the possibilities offered by this technique. The tomography facility ANTARES at the FRM-II in Garching was designed to perform phase contrast measurements with neutrons as a matter of routine.
A big goal is to do quantitative phase contrast radiography and the step towards phase contrast tomography. By performing phase retrieval for every slice of a tomographic data set it becomes possible to assign every voxel the imaginary (attenuation coefficient) and the real part of the refractive index. This allows the separation of materials, which could not be separated hitherto in conventional tomographies.