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AbstractAbstract
[en] In this paper the capabilities of stroboscopic x-ray topography to visualize the propagation of short (<10 μm) surface acoustic waves (SAW) in single crystals are analysed. Experiments with LiNbO3 crystals under SAW excitation were carried out at the ID19 beam line of the European synchrotron radiation facility. The developed theoretical analysis of the SAW-induced contrast in Bragg scattering geometry helped to optimize experimental conditions and receive high quality images with well-resolved individual acoustic wave fronts. The basic contrast mechanism is related to the SAW-induced corrugation of atomic planes that causes the focusing of x-rays. The focal distance is directly proportional to the SAW wavelength and inversely proportional to the deformation amplitude at the crystal surface. Simulations of diffraction contrast allowed us to conclude that the best contrast is achieved when the acoustic wave vector is perpendicular to the x-ray scattering plane and the sample/film distance equals 2-4 focal distances
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Source
X-TOP 2002: 7. international conference on x-ray imaging and high resolution diffraction; Grenoble (France); 10-14 Sep 2002; S0022-3727(03)60196-8; Available online at http://stacks.iop.org/0022-3727/36/A122/d310a25.pdf or at the Web site for the Journal of Physics. D, Applied Physics (ISSN 1361-6463) http://www.iop.org/; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
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ALKALI METAL COMPOUNDS, BREMSSTRAHLUNG, CHALCOGENIDES, COHERENT SCATTERING, CRYSTALS, DIFFRACTION, ELECTROMAGNETIC RADIATION, ENERGY-LEVEL TRANSITIONS, NIOBIUM COMPOUNDS, OXIDES, OXYGEN COMPOUNDS, PROCESSING, QUASI PARTICLES, RADIATION SOURCES, RADIATIONS, REFLECTION, REFRACTORY METAL COMPOUNDS, SCATTERING, SYNCHROTRON RADIATION SOURCES, TRANSITION ELEMENT COMPOUNDS
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