An Open-Source Monte Carlo Simulator for High-Z Semiconductor Detectors With a Charge Cloud Discretization Method

IF 1.9 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Nuclear Science Pub Date : 2025-03-06 DOI:10.1109/TNS.2025.3548909

Jacopo Quercia;Filippo Mele;Iurii A. Eremeev;Giuseppe Bertuccio

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引用次数: 0

Abstract

A Monte Carlo simulator is presented to evaluate the spectroscopic response of high-Z semiconductor pixel radiation detectors starting from the first principles of physical laws. It performs simulation in three different domains: electrostatic fields, photon-matter interaction, and photo-generated charge-carriers transport. A sampling algorithm is proposed to address the issue of fast and accurate computations of charge cloud dynamics in the presence of both diffusion and electrostatic repulsion effects, avoiding direct numerical integration of the induced current equation stated by the Shockley-Ramo theorem under a constant electric field hypothesis. The simulator is written as an object-oriented programming (OOP) source code repository, relying on the integration between MATLAB and COMSOL Multiphysics, and can be run with one executable script. The simulator architecture is presented, followed by a detailed explanation of all the physical models and implemented simulation strategies. The simulator is validated with experimental energy spectra acquired with a radiation detection system based on cadmium zinc telluride (CdZnTe) pixel detectors and ultralow-noise front-end electronics with state-of-the-art energy resolution.

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基于电荷云离散方法的高z半导体探测器的开源蒙特卡罗模拟器

从物理定律的第一性原理出发，提出了一种蒙特卡罗模拟方法来评估高z半导体像素辐射探测器的光谱响应。它在三个不同的领域进行模拟：静电场，光子-物质相互作用和光产生的电荷载流子输运。提出了一种采样算法，以解决在扩散和静电斥力作用下快速准确计算电荷云动力学的问题，避免了在恒定电场假设下由Shockley-Ramo定理表示的感应电流方程的直接数值积分。该模拟器采用面向对象编程（OOP）源代码库的形式编写，依托MATLAB与COMSOL Multiphysics的集成，可通过一个可执行脚本运行。首先介绍了模拟器的结构，然后详细解释了所有的物理模型和实现的仿真策略。该模拟器通过基于碲化镉锌（CdZnTe）像素探测器和具有最先进能量分辨率的超低噪声前端电子设备的辐射探测系统获得的实验能谱进行了验证。

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

IEEE Transactions on Nuclear Science 工程技术-工程：电子与电气

CiteScore

3.70

自引率

27.80%

发文量

314

审稿时长

6.2 months

期刊介绍： The IEEE Transactions on Nuclear Science is a publication of the IEEE Nuclear and Plasma Sciences Society. It is viewed as the primary source of technical information in many of the areas it covers. As judged by JCR impact factor, TNS consistently ranks in the top five journals in the category of Nuclear Science & Technology. It has one of the higher immediacy indices, indicating that the information it publishes is viewed as timely, and has a relatively long citation half-life, indicating that the published information also is viewed as valuable for a number of years. The IEEE Transactions on Nuclear Science is published bimonthly. Its scope includes all aspects of the theory and application of nuclear science and engineering. It focuses on instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.