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27 August 2015 Measuring x-ray spectra of flash radiographic sources
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Abstract
A Compton spectrometer has been re-commissioned for measurements of flash radiographic sources. The determination of the energy spectrum of these sources is difficult due to the high count rates and short nature of the pulses (~50 ns). The spectrometer is a 300 kg neodymium-iron magnet which measures spectra in the <1 MeV to 20 MeV energy range. Incoming x-rays are collimated into a narrow beam incident on a converter foil. The ejected Compton electrons are collimated so that the forward-directed electrons enter the magnetic field region of the spectrometer. The position of the electrons at the magnet’s focal plane is a function of their momentum, allowing the x-ray spectrum to be reconstructed. Recent measurements of flash sources are presented.
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Amanda E. Gehring, Michelle A. Espy, Todd J. Haines, Jacob Mendez, David C. Moir, Robert Sedillo, Roger P. Shurter, Petr Volegov, and Timothy J. Webb "Measuring x-ray spectra of flash radiographic sources", Proc. SPIE 9595, Radiation Detectors: Systems and Applications XVI, 959506 (27 August 2015); doi: 10.1117/12.2188829; https://doi.org/10.1117/12.2188829
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