放射性实验模拟仿真教学设备的研制及应用  

Development and application of simulation-based teaching equipment for radioactive experiments

作　　者：胡传皓 曾国强[1] 郑雄峰 顾民[1] 杨剑[1] 杨小峰[1] 胡世敏 HU Chuanhao;ZENG Guoqiang;ZHENG Xiongfeng;GU Min;YANG Jian;YANG Xiaofeng;HU Shimin(College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059

出　　处：《实验技术与管理》2024年第5期166-172,共7页Experimental Technology and Management

基　　金：四川省2021—2023年高等教育人才培养质量和教学改革重点项目(JG2021-654);成都理工大学中青年骨干教师发展资助计划项目(JXGG2021-06876);国家自然科学基金青年基金项目(11905020)。

摘　　要：针对现有放射性实验教学中,因难以大规模装备放射源及射线测量装置而无法支撑开设实验项目的问题,该文研制了一款放射性实验模拟仿真教学设备,并以此为核心搭建了实验教学平台,开展了核辐射探测器信号输出、射线能谱测量等多个实验。结果表明,该实验教学设备具有使用安全、操作简便、性能稳定、可拓展性强的优点,基于该设备可以开展大部分认知类、基础类以及综合类放射性实验,从而拓展实验教学内容的深度和广度,提升学生的实践动手能力,改进实验教学质量。[Objective]To meet the challenge of large-scale use of radioactive sources and radiation measuring devices in radiation experiment teaching,a simulation device for radiation experiments was developed,which serves as the foundation for establishing a simulation-based teaching platform for radioactivity experiments.Based on this platform,various types of experiments can be conducted in the teaching process of nuclear majors,thereby improving their quality of education.[Methods]The teaching platform includes four main components:a PC host computer,an embedded master controller,a laser diode(LD)-based nanosecond light source,and a digital pulse processor(DPP).The working process is as follows.First,the host computer calls different experimental models and simulates the particle transport process that models the interaction between radiation and the involved detector,thereby generating a particle data stream that matches the characteristics of the radioactive source and detector.Second,the embedded master controller converts this particle data stream containing the characteristics of the radioactive source into a digital signal stream and drives a high-speed digital-to-analog converter to output a current pulse signal with random amplitude and timing.Third,the LD outputs a nanosecond optical signal that corresponds to the detector signal waveform when driven by a current pulse;then,the optical signal is converted into the electrical signal by the photoelectric conversion device.Last,the DPP operates in the particle multiparameter measurement mode.It uses a digital trapezoidal shaper to achieve excellent filtering and noise reduction,thereby improving the accuracy of pulse amplitude extraction.In addition,a symmetrical zero-surface trapezoidal shaper is used to suppress low-frequency noise and improve the accuracy of pulse triggering.It can acquire the amplitude,timing,and detector position information of the incident particles in each channel,effectively replacing the need for multiple radiation measurement devices.[R

关 键 词：放射性实验 核辐射探测 实验教学设备 

分 类 号：TL821[核科学技术—核技术及应用] TP391.9[自动化与计算机技术—计算机应用技术]