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Mikroskopie und Tomographie Poster: Mi., 14:00–16:30 M-P98
The new multipurpose tomography setup at the GKSS material science
beamline at HASYLAB/DESY
Oliver Brunke 1 , Stefan Odenbach 1 , Bernd Hasse 2 , Felix Beckmann 3
1 TU Dresden, Lehrstuhl für Magnetofluiddynamik, 01062 Dresden – 2 TU Berlin,
Institut für Materialwissenschaften und Technologien, 10587 Berlin – 3 GKSS-
Forschungszentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht
State of the art tomography systems at synchrotron sources nowadays offer outstanding
possibilities with respect to e.g. spatial resolution or density discrimination. Another
important feature of synchrotron-based tomography is the reduction of the scanning
time down to a few seconds for a whole tomographic dataset which is in principle
possible due to the high brilliance of the source. CCD-detectors and computer hardware
which are fast enough to fulfil the requirements become available nowadays and with
this the developments of new setups begin to emerge. A reduction of the scanning time
to short scanning periods offers new experimental possibilities e.g. for so called 4D
which means in-situ time dependent dynamic tomography examinations. Furthermore,
due to the reduction of the radiation dose, in-vivo biomedical studies will become
available at synchrotrons sources.
In order to achieve the possibilities for these dynamic studies we have developed a
new multipurpose tomography system which is currently installed at the high energy
material science beamline HARWI-2 at HASYLAB/DESY in Hamburg/Germany. The
beam characteristics with a geometric cross section of up to 10x80 mm 2 and the energy
range of 20-200 keV offers a wide spectrum for the analysis of samples with a high
diversity in absorption and geometry. The detector characteristics will allow scanning
times of below 5 s for a complete dataset at about 20 microns spatial resolution using a
monochromatic beam. The maximum spatial resolution is about 2 microns. A special
feature of the system is the possibility to perform simultaneous spatially resolved diffraction
and tomography measurements. Thus the system will allow the determination
of e.g. the residual strain map and the 3D morphology of a sample during a single
experimental scan. In our poster we will demonstrate the key features of our system
as well as first preliminary results.