12 September 2016 MCNP estimate of ZLS lens sensitivity in an x-ray field
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Abstract
The telecentric zoom lens system (ZLS) has proven to be invaluable in flash x-ray field operations and recent successful experiments pertaining to stockpile stewardship. The ZLS contains 11 custom-manufactured lenses, a turning mirror (pellicle), and an x-ray-to-visible-light converting scintillator. Images are recorded on a fully characterized CCD. All hardware is supported by computerized, programmable, electro-mechanical mounts and alignment apparatus. Seven different glass material types varying in chemical stoichiometry comprise the 11 ZLS lenses. All lenses within the ZLS are out of the path of direct x-ray radiation during normal operation. However, any unshielded scattered x-ray radiation can result in energy deposition into the lenses, which may generate some scintillating light that can couple into the CCD. This extra light may contribute to a decrease in signal-to-noise ratio (SNR) and lower the overall fidelity of the radiograph images. An estimate of the scintillation generation and sensitivities for each of the seven types of glass used as lenses in the ZLS is presented. This report also includes estimates of the total observed background decoupling that each of the lens material types contribute.
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Stephen E. Mitchell, Stephen E. Mitchell, Stuart A. Baker, Stuart A. Baker, Russell A. Howe, Russell A. Howe, Robert M. Malone, Robert M. Malone, } "MCNP estimate of ZLS lens sensitivity in an x-ray field", Proc. SPIE 9969, Radiation Detectors: Systems and Applications XVII, 996903 (12 September 2016); doi: 10.1117/12.2235287; https://doi.org/10.1117/12.2235287
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