Evaluating laser-driven Bremsstrahlung radiation sources for imaging and analysis of nuclear waste packages.
Evaluating laser-driven Bremsstrahlung radiation sources for imaging and analysis of nuclear waste packages.
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DOI：
10.1016/j.jhazmat.2016.07.057
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发表时间：
2016-11
影响因子：
13.6
通讯作者：
Christopher P. Jones;C. Brenner;C. Stitt;C. Armstrong;D. Rusby;S. R. Mirfayzi;L. Wilson;A. Alejo-A.-Al
中科院分区：
文献类型：
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作者：
Christopher P. Jones;C. Brenner;C. Stitt;C. Armstrong;D. Rusby;S. R. Mirfayzi;L. Wilson;A. Alejo-A.-Al
一个小规模的样品核废料包，包括一个28毫米直径的铀便士包裹在水泥浆，通过吸收对比度射线照相术成像，使用单脉冲曝光的X射线源驱动的高功率激光。Vulcan激光器用于将光子的聚焦脉冲传递到钽箔，以便产生具有高度穿透性的X射线（能量>500 keV）的明亮爆发，其中源尺寸<0.5 mm。BAS-TR和BAS-SR图像板用于图像捕获，以及新开发的基于铊掺杂碘化铯的探测器耦合到CCD芯片。铀币在30 cm 2扫描区域内的单次扫描采集中清晰地分辨到亚毫米精度。此外，还在现场演示了用X射线束一次发射产生中子的情况，从而展示了对废料进行多模式临界测试的潜力。这项可行性研究成功地证明了对封装的高密度核材料进行无损射线照相。随着高功率激光系统的最新发展，到10 Hz操作，设想了用于废物监测应用的激光驱动的多模光束线。
A small scale sample nuclear waste package, consisting of a 28 mm diameter uranium penny encased in grout, was imaged by absorption contrast radiography using a single pulse exposure from an X-ray source driven by a high-power laser. The Vulcan laser was used to deliver a focused pulse of photons to a tantalum foil, in order to generate a bright burst of highly penetrating X-rays (with energy >500 keV), with a source size of <0.5 mm. BAS-TR and BAS-SR image plates were used for image capture, alongside a newly developed Thalium doped Caesium Iodide scintillator-based detector coupled to CCD chips. The uranium penny was clearly resolved to sub-mm accuracy over a 30 cm2scan area from a single shot acquisition. In addition, neutron generation was demonstrated in situ with the X-ray beam, with a single shot, thus demonstrating the potential for multi-modal criticality testing of waste materials. This feasibility study successfully demonstrated non-destructive radiography of encapsulated, high density, nuclear material. With recent developments of high-power laser systems, to 10 Hz operation, a laser-driven multi-modal beamline for waste monitoring applications is envisioned.