Abstract

This chapter discusses the X-ray topography with scintillators coupled to image intensifiers or camera tubes. It is investigated that the possibility of imaging topographic features in real time by using a thin scintillator coupled to either a high gain image intensifier or a camera tube. The camera tube must have a high gain because of the low photon fluxes that are encountered in practice, and because of the relatively low quantum yield of thin phosphors. With conventional X-ray generators, the resolution is photon noise limited. With more powerful generators like synchrotrons, real time imaging appears possible, and the resolution is limited by the MTF of the image tube. Higher resolution can be reached by increasing the magnification between the screen and the image tube. When doing so, the input field is reduced and thinner phosphor screeds must be used, resulting in a lower yield.

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