标题： 基于虚拟弗里施网格几何的CZT伽马探测器用于现场放射性同位素识别 显示英文标题

标题： A Virtual Frisch-Grid Geometry-Based CZT Gamma Detector for In-Field Radioisotope Identification

摘要： 我们提出了一种基于虚拟弗里施-网格几何结构的CZT伽马射线探测器，该探测器用于在从单keV到2MeV的能量范围内识别不同的放射性同位素，并且对于CZT晶体的有效表征很有用。 探测器由一个3 x 3的CZT晶体矩阵构成，每个晶体的尺寸约为6 mm x 6 mm x 15 mm。 传感器活性体积内产生的电荷通过直接连接到AVG3_Dev集成电路上的阳极读出。 由电荷漂移引起的电流信号在晶体的侧垫上收集，从而实现三维相互作用位置的重建。 本文讨论了独立的、便携的探测器系统的设计、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读出集成电路，具有每通道数字信号处理的高速FPGA，并具备嵌入式系统功能。 该设备紧凑、电池供电，并支持无线数据流传输，适用于放射性同位素识别的现场操作。 显示英文摘要

摘要： We present a Virtual Frisch-Grid geometry-based CZT gamma detector developed for identifying different radioisotopes over an energy range from single keV up to 2 MeV, and useful for efficient characterization of CZT crystals. The detector is built with a 3 x 3 matrix of CZT crystals, each measuring approximately 6 mm x 6 mm x 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, 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 towards radioisotope identification.