X-ray TV Imaging and Real-Time Experiments

  • W. Hartmann
Part of the Nato Advanced Study Institutes Series book series (NSSB, volume 63)


Real-time X-ray topography is a powerful modern tool to study directly the dynamic behaviour of strain fields and defects in crystals under various influences. Real-time methods may be grouped into two broad categories depending on the general principle used to permit rapid viewing and recording of topographic images, namely the single-stage and the multiple-stage imaging methods. In the single-stage imaging method, an X-ray sensitive vidicon tube directly converts the X-ray topograph into an electronic charge pattern. This charge pattern is read out by a scanning electron beam and displayed as a visible image on a television (TV) monitor. Chikawa and collaborators [1,2] have developed this technique which is presently, however, limited to a spatial resolution of 30pm. On the other hand, we prefer the multiple-stage imaging method where the X-ray image is first converted into a visible pattern by a fluorescent screen [3]. The visible light pattern is then optically coupled either by a lens or a fiber-optic plate to the input photocathode of a light-sensitive electro-optical device. The output image is displayed on a TV monitor. This method is inherently capable of higher resolution (presently ∼ 10 μm), which is a prerequisite for detection of individual dislocations. A survey and discussion about X-ray TV systems is given by Tanner [4] Green [5] and the present author [6].


Domain Wall Misfit Dislocation Storage Unit Digital Integration Scanning Electron Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer Science+Business Media New York 1980

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  • W. Hartmann

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