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M: Metallphysik

M 34: Symposium Tomographic Methods in Materials Research

M 34.3: Vortrag

Montag, 7. März 2005, 17:40–18:00, TU H1058

3-D X-ray imaging: Current status and future developments at HGHG-FELs — •Gerd Schneider — BESSY m.b.H., Albert-Einstein-Str. 15, 12489 Berlin

The full-field x-ray microscope installed at the 3rd generation electron storage ring BESSY II is dedicated for applications in life, environmental and materials sciences. It covers the photon energy range between 250 - 750 eV. Currently, the spatial resolution is about 20 nm. Due to the small numerical aperture of zone plates, X-ray objectives have a depth of focus on the order of several microns. By treating the X-ray microscopy images as projections of the sample absorption, computed tomography can be performed.

3-D x-ray microscopy - pioneered at the BESSY I electron storage ring - has found numerous applications worldwide. To further improve 3-D x-ray imaging towards 10 nm spatial resolution and to increase the usable photon energy range into the hard x-ray region, progress has to be made in nanotechnology of the x-ray optics, the instrumentation and the theory for recovering the full 3-D information of an object at this resolution level. In the talk, the current status at synchrotron sources and future aspects of x-ray imaging with fs-pulses from Free Electron Lasers will be discussed.