A monolithic antineutrino detector for non-intrusive reactor monitoring

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-08-06 DOI:10.1016/j.nima.2025.170915

Steven A. Dazeley , Oluwatomi A. Akindele , Marc Bergevin , Adam Bernstein , Peter C. Haugen , Viacheslav A. Li , Anthony F. Papatyi

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引用次数: 0

Abstract

Recent advances in organic detection media have found applications in reactor antineutrino physics. One example is the Precision Oscillation and Spectrum Experiment (PROSPECT), which leveraged pulse-shape sensitivity to enable a successful surface deployment at the High Flux Isotope Reactor (HFIR), achieving a signal to background of 4:1. PROSPECT utilized almost 4 tonnes of ⁶Li-doped pulse-shape sensitive liquid scintillator in a two-dimensional segmented array. It used a combination of pulse-shape sensitivity and position sensitivity via segmentation to reduce the most prominent form of correlated background for surface detectors — cosmogenic fast neutrons. These new liquids may enable detector designs that bring additional tools for reducing backgrounds while reducing engineering complexity. In this paper, we present an investigation into a detector design that exploits properties of these liquids by maximizing spectral and pulse-shape sensitivity via highly efficient photon detection. The detector utilizes photomultiplier tubes (PMTs) placed at the top and bottom of a right cylinder, with highly reflective white walls. This design sacrifices some position sensitivity for maximal photon efficiency. The design choice has consequences for the identification of the background and antineutrino sensitivity, which we examine.

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用于非侵入式反应堆监测的单片反中微子探测器

有机检测介质的最新进展已经在反应堆反中微子物理中找到了应用。其中一个例子是精密振荡和频谱实验（PROSPECT），该实验利用脉冲形状灵敏度，成功地在高通量同位素反应堆（HFIR）上进行了表面部署，实现了4:1的信号与背景比。PROSPECT在二维分段阵列中使用了近4吨掺6li的脉冲形状敏感液体闪烁体。它结合了脉冲形状灵敏度和位置灵敏度，通过分割来减少表面探测器最突出的相关背景形式——宇宙生成快中子。这些新型液体可以为探测器设计带来额外的工具，以减少背景，同时降低工程复杂性。在本文中，我们提出了一种探测器设计的研究，利用这些液体的特性，通过高效的光子探测最大化光谱和脉冲形状的灵敏度。探测器利用光电倍增管（pmt）放置在顶部和底部的右圆柱体，具有高反射的白壁。这种设计牺牲了一些位置灵敏度来获得最大的光子效率。设计选择对背景和反中微子灵敏度的识别有影响，我们将对此进行研究。

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

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.