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Characterization of -Ray Cross Talk in Cherenkov-Based Detectors for Active Interrogation Imaging Applications

机译：主动审问成像应用中基于Cherenkov的探测器中-Ray串扰的特性

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摘要

In imaging arrays, the sensors are typically packed as tightly as possible to maximize spatial resolution, which leads to detector-to-detector scatter, or cross talk, adding to image noise and hindering contrast. In this paper, we compare custom-made quartz-based Cherenkov detectors with an inherent energy threshold to low-energy photons to standard sodium iodide detectors, which are typically used for x-ray detection due to their efficiency and spectroscopic capabilities. In particular, we evaluate pulse pileup and cross talk effects in high-flux applications. The quartz detectors, while having reduced intrinsic efficiency, outperform the sodium iodide with regards to pileup and cross talk. Simulation further shows that even at a 4 mm edge-to-edge separation, cross talk contributes less than 2% of the total signal in Cherenkov detectors.
机译：在成像阵列中，传感器通常尽可能紧密地包装，以最大程度地提高空间分辨率，从而导致检测器之间的散射或串扰，从而增加图像噪声并阻碍对比度。在本文中，我们将具有固有能量阈值的定制石英基Cherenkov检测器，低能光子与标准碘化钠检测器进行比较，标准碘化钠检测器由于其效率和光谱功能而通常用于X射线检测。特别是，我们评估了高通量应用中的脉冲堆积和串扰效应。石英探测器的固有效率降低，但在堆积和串扰方面优于碘化钠。仿真进一步表明，即使在边距为4 mm的情况下，串扰在Cherenkov检测器中的贡献也不到总信号的2％。

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  • 来源
    《IEEE sensors journal》 |2017年第20期|6707-6715|共9页
  • 作者

    Joseph Harms; Paul B. Rose; Anna Erickson;

  • 作者单位

    Nuclear and Radiological Engineering and Medical Physics Programs, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA;

    Nuclear and Radiological Engineering and Medical Physics Programs, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA;

    Nuclear and Radiological Engineering and Medical Physics Programs, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Detectors; Photonics; Sodium; Energy resolution; Sensor arrays;

    机译：探测器;光子学;钠;能量分辨率;传感器阵列;

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