CAMIS: A Cylindrical Active Mask Imaging System

IF 1.9 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Nuclear Science Pub Date : 2025-03-29 DOI:10.1109/TNS.2025.3575007

C. Lamb;J. A. Hanks;J. Ellin;D. Hellfeld;R. J. Cooper;B. J. Quiter;K. Vetter

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引用次数: 0

Abstract

Detecting and locating radiological and nuclear materials at distances of 10 m or more in urban and cluttered environments continues to pose challenges in nuclear security and proliferation detection. Previous approaches have focused on large-area radiation imaging using planar configurations of detectors and passive masks. However, these approaches suffer from limitations such as limited field-of-view (FOV) and reduced detection efficiency due to absorption in the mask. To address these limitations, we have developed the cylindrical active mask imaging system (CAMIS). This system comprises 128 NaI(Tl) (10 cm)3 detectors. These detectors are arranged in a cylindrical configuration, enabling gamma-ray imaging with a full 360° azimuthal FOV. The active mask elements within the system are arranged in a pseudorandom configuration, providing unique encoding for all incident directions within the FOV. CAMIS offers an effective detection area of approximately 1 m2 across the entire 360° FOV in the horizontal plane, achieving a mean angular resolution of 10.9° in the azimuthal direction and 12.9° in the polar direction measured by taking the full-width at half-maximum (FWHM) of a cross-section at the maximum reconstructed intensity.

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CAMIS：一种圆柱形主动掩模成像系统

在城市和杂乱环境中，在10米或更远的距离探测和定位放射性材料和核材料，继续对核安全和扩散探测构成挑战。以前的方法集中在使用探测器和被动掩模的平面结构进行大面积辐射成像。然而，这些方法存在视场（FOV）有限和由于掩模吸收而降低检测效率等局限性。为了解决这些限制，我们开发了圆柱形有源掩模成像系统（CAMIS）。该系统由128个NaI(Tl) (10 cm)3探测器组成。这些探测器排列成圆柱形结构，使伽马射线成像具有完整的360°方位FOV。系统内的有源掩模元素以伪随机配置排列，为视场内的所有入射方向提供唯一编码。CAMIS在水平面360°视场范围内提供了约1 m2的有效检测面积，在最大重建强度下取截面半最大宽（FWHM），在方位角方向上实现10.9°的平均角分辨率，在极方向上实现12.9°的平均角分辨率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Nuclear Science 工程技术-工程：电子与电气

CiteScore

3.70

自引率

27.80%

发文量

314

审稿时长

6.2 months

期刊介绍： The IEEE Transactions on Nuclear Science is a publication of the IEEE Nuclear and Plasma Sciences Society. It is viewed as the primary source of technical information in many of the areas it covers. As judged by JCR impact factor, TNS consistently ranks in the top five journals in the category of Nuclear Science & Technology. It has one of the higher immediacy indices, indicating that the information it publishes is viewed as timely, and has a relatively long citation half-life, indicating that the published information also is viewed as valuable for a number of years. The IEEE Transactions on Nuclear Science is published bimonthly. Its scope includes all aspects of the theory and application of nuclear science and engineering. It focuses on instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.