Microtomography using synchrotron radiation as a user experiment at beamlines BW2 and BW5 of HASYLAB at DESY

Microtomography using synchrotron radiation became a valuable tool for the non-invasive, 3-dim. investigation of samples in fields like medicine, biology and material science.(1) Attenuation- and phase-contrast techniques were optimized at beamline BW2 using photon energies in the range of 8 to 24 keV.(2-4). In order to extend this method to larger samples, resp. to specimen consisting of elements with higher absorption the apparatus was set up at the high energy beamline BW5 to apply attenuation contrast microtomography using photon energies in the range of 60 to 110 keV.(5) Furthermore different scanning techniques were developed and applied to larger samples up to 22 nun in diameter.(6) The experimental setup originally developed at the University of Dortmund, Germany and the improvements made at HASYLAB to provide for a user experiment for attenuation-contrast microtomography will be described. Several examples will demonstrate the practical application of the current system as a user experiment for performing continuous tomographical scans.