From Event: SPIE Optical Engineering + Applications, 2016
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.
Stephen E. Mitchell, Stuart A. Baker, Russell A. Howe, and Robert M. Malone, "MCNP estimate of ZLS lens sensitivity in an x-ray field," Proc. SPIE 9969, Radiation Detectors: Systems and Applications XVII, 996903 (Presented at SPIE Optical Engineering + Applications: August 31, 2016; Published: 12 September 2016); https://doi.org/10.1117/12.2235287.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.