Abstract
A description is given of the design and performance of a novel fluorescent X-ray source, comprising a demountable conical target enclosed in a conical anode X-ray tube. Measurements are presented of the spectral purity of the fluorescent emission and the variation in photon flux with the applied tube voltage. A Ta target tube (Kalpha 1=57.532 keV) powered by a standard 3.75 kW, 160 kV high voltage generator has a source brightness of 109 photons/s sr mm2. This is 500 times greater than that of the brightest available 241-Am radionuclide sources. Some potential applications of the fluorescent X-ray source are listed.
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