7 July 1997 Polycapillaries and x-ray lens performances in order to improve conventional radiography experiments
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The goal of polycapillaries and Kumakhov lens study is to bring out possible and liable ameliorations in terms of spatial resolution, brightness and spectral discrimination to a flash radiography chain used to image moving objects. Different kinds of polycapillaries have been tested with an x ray tube and a synchrotron beamline (DCI/LURE), in order to determine the performances of each type and highlight principal parameters which influence transmission and divergence. This report presents theoretical and experimental methods used to characterize polycapillaries and Kumakhov lens. The energy range studied is 10 to 50 keV. Tested polycapillaries are 5 to 20 cm in length. The number of capillaries inside the polycapillaries is: 550, 1250, and 2700. Various profiles have been checked: linear, circular arc curvatures, double circular arc curvatures and cubic curvatures. The transmission measurement is carried out either with a germanium diode or through fluorescence on a metallic foil. The divergence is analyzed either by photosensitive plate or by an x ray camera. Kumakhov lenses are tested in the same way. The knowledge of polycapillaries characteristics allows us to design future collection of polycapillaries (lens) to satisfy restraint, dimensions, positioning in radiography experiment.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jean-Marc Berlu, Steven Lemoing, Pierre Chevallier, Jean-Yves Boutin, "Polycapillaries and x-ray lens performances in order to improve conventional radiography experiments", Proc. SPIE 3115, Hard X-Ray and Gamma-Ray Detector Physics, Optics, and Applications, (7 July 1997); doi: 10.1117/12.277700; https://doi.org/10.1117/12.277700

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