A virtual Frisch-grid geometry-based CZT gamma detector for in-field radioisotope identification

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 : 2025-08-27 DOI:10.1016/j.nima.2025.170976

P. Maj , G. Pinaroli, A. Bolotnikov, G.A. Carini, G.W. Deptuch, D.S. Gorni, S. Herrmann, D. Pinelli, J. Pinz, A. Verderosa

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引用次数: 0

Abstract

We present a Virtual Frisch-Grid geometry-based CZT gamma detector developed for identifying different radioisotopes over an energy range from a few keV up to 2 MeV, and useful for efficient characterization of CZT crystals. The detector is built with a 3

\times

3 matrix of CZT crystals, each measuring approximately 6 mm

\times

6 mm

\times

15 mm. The charge generated within the sensor’s active volume is read out via an anode connected directly to the AVG3_Dev integrated circuit. A current signal induced by charge drift is collected on side pads of the crystals, enabling reconstruction of a 3D interaction position. This paper discusses the design, development, and performance of the standalone, mobile detector system, which integrates the AVG3_Dev readout IC developed at Brookhaven National Laboratory, a high-speed FPGA-based with per-channel digital signal processing, and embedded system capabilities. The device is compact, battery-powered, and supports wireless data streaming, making it suitable for field operations for radioisotope identification.

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基于虚拟飞盘网格几何的现场放射性同位素鉴定CZT探测器

我们提出了一种基于虚拟Frisch-Grid几何的CZT伽玛探测器，用于识别能量范围从几keV到2 MeV的不同放射性同位素，并用于有效表征CZT晶体。该探测器由一个3 × 3的CZT晶体矩阵构成，每个晶体的尺寸约为6 mm × 6 mm × 15 mm。传感器活动体积内产生的电荷通过直接连接到AVG3_Dev集成电路的阳极读出。由电荷漂移引起的电流信号被收集在晶体的侧垫上，从而能够重建三维相互作用位置。本文讨论了独立移动探测器系统的设计、开发和性能，该系统集成了布鲁克海文国家实验室开发的AVG3_Dev读出IC，一种基于高速fpga的单通道数字信号处理和嵌入式系统功能。该设备结构紧凑，电池供电，支持无线数据流，适用于放射性同位素鉴定的现场作业。

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.