Modeling the emission spectra of pulsed X-ray tubes
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Abstract
The results of modeling the spectra of X-ray braking radiation of pulsed tubes of reflex and transmission type have been shown. They consider the design of anode-cathode unit, material of anode and outlet window, changing of the anode voltage and anode current during the pulse in tubes with explosive emission and also angle between trajectories of electrons and anode surface. Using MathCAD software there were calculated instant and total (per pulse) spectra of single directional (axial) radiation and radiation for different angles, that form a panorama shadow image of controlled materials or products. The experimental dependence of the absorption of the anode material and the outlet window and the photon energy, volt-second and ampere-second characteristics of anode voltage and current were interpolated by cubic and quadratic splines. The dependence of Thomson-Viddington constants and anode voltage was exponential approximated.
Specific examples of simulated total spectra of reflex tubes were shown with an anode as conical surface and the cathode formed by a solitary sharp washer on the inside, and transmission type anode tubes is shaped like a flat foil.
Reference 9, figures 6.
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