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首頁> 外文期刊>Nuclear instruments and methods in physics research >Characterization of novel rotating scatter mask designs for gamma direction identification
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Characterization of novel rotating scatter mask designs for gamma direction identification

機譯:用于伽馬方向識別的新型旋轉(zhuǎn)散射掩模設(shè)計的特性

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摘要

The Rotating Scatter Mask system is a low cost, directional radiation detection system with a nearly 4_π field-of-view over a broad range of photon energies. However, the original mask design is limited by numerous similarities in the detector response directional modes. These similarities introduce potential misidentification errors when determining a source's direction. Previous studies identified a better mask design, the Mace, which significantly reduced the similarities between the modes. In this work, a new design class was simulated and compared to the Mace mask design using the modal assurance criterion to assess the differentiability between directional modes. At the expense of a reduced field-of-view, 93% of a full An steradians, these novel mask designs were shown to successfully decouple the angular components of the source's direction, improving the average criterion value by up to 66%. The new designs also significantly improved the system's detection efficiency, reducing the time to identify the source's direction by up to 60%, while enabling a simplified, alternative algorithm for identifying the source direction. This alternative approach, called the geometric correlation method, further improved detection efficiency leading to a near-real time analysis for locating a source direction with the Rotating Scatter Mask.
機譯:旋轉(zhuǎn)散射掩模系統(tǒng)是一種低成本的定向輻射檢測系統(tǒng),在廣泛的光子能量范圍內(nèi)具有近4_π的視場。然而,原始的掩模設(shè)計受到檢測器響應(yīng)方向模式中眾多相似性的限制。這些相似之處在確定放射源的方向時會引入潛在的誤識別錯誤。先前的研究確定了一種更好的掩模設(shè)計,即釘頭錘(Mace),它極大地降低了兩種模式之間的相似性。在這項工作中,模擬了一個新的設(shè)計類,并使用模態(tài)保證標(biāo)準(zhǔn)將其與Mace掩模設(shè)計進行了比較,以評估方向模之間的差異性。這些新穎的掩模設(shè)計以減小的視野(整個An Steradians的93%)為代價,成功地將源方向的角度分量解耦,從而將平均標(biāo)準(zhǔn)值提高了多達66%。新設(shè)計還顯著提高了系統(tǒng)的檢測效率,將識別源方向的時間減少了多達60%,同時啟用了一種簡化的替代算法來識別源方向。這種稱為幾何相關(guān)方法的替代方法進一步提高了檢測效率,從而導(dǎo)致了近實時分析,從而可以使用旋轉(zhuǎn)散射蒙版定位源方向。

著錄項

  • 來源
    《Nuclear instruments and methods in physics research》 |2020年第21期|161232.1-161232.9|共9頁
  • 作者

  • 作者單位

    Department of Engineering Physics Air Force Institute of Technology Wright-Patterson AFB OH United States;

    Department of Engineering Physics Air Force Institute of Technology Wright-Patterson AFB OH United States Department of Mechanical Engineering Cedarville University Cedarville OH United States;

  • 收錄信息
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類
  • 關(guān)鍵詞

    RSM; Design characterization; Gamma imaging; Source direction;

    機譯:RSM;設(shè)計特征;伽瑪成像源方向;

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