Progress in microtomography with the Bragg Magnifier at SLS

The advent of high performance 3rd generation synchrotron sources boosted progress of computer tomographic research towards larger energies and higher resolution. To surpass present limitations in resolution (>1 μm) and efficiency (a few %) proceeding to higher energies, we have developed a innovative technique using 2 extremely asymmetrical Bragg crystals for X-ray imaging and magnification. The device yields distortion and aberration free images and near-field holograms with magnification factors up to 250x250 at X-ray energies around 22 keV with drastically increased efficiency. In conjunction with the X-ray sensing pixel detector PILATUS the total efficiency could be further improved. Thus even at highest magnification factors exposure times of a few msec could be achieved