Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 35: Instrumentation und Anwendungen
HK 35.4: Vortrag
Dienstag, 8. März 2005, 17:45–18:00, TU MA144
X-Ray Interferences with Transition Radiation from a Micro-Focused 600 MeV Electron Beam of MAMI — •M. El Ghazaly, H. Backe, N. Clawiter, F. Hagenbuck, W. Lauth, A. Rueda, and T. Weber — Institut für Kernphysik der Universität, D-55099 Mainz
Transition Radiation in the X-ray region has been produced with a 600 MeV electron beam of the Mainz Microtron MAMI in a stack of thin polyimide foils. From the small beam spot of size σh = 1.9 µm (rms) and σv = 1.6 µm (rms) transverse coherent 6 keV X-rays are emitted in a cone with an apex angle of about 2 mrad. The radiation was monochromized by a (111) silicon single crystal in a distance of 7.34 m from the target. Tungsten and polymer wires of various thickness in the region between 10 µm and 200 µm were imaged with both, X-ray films and an open CCD chip. Interference fringes up to the 13th order were observed and quantitatively analyzed. The possibility will be discussed to get information on the structure of objects by this kind of Gabor in-line holograms in the X-ray region.
Work supported by Deutsche Forschungsgemeinschaft DFG under contract BA 1336/1-3