CAJ | 학술논문

4πβ－γ符合计数系统是为4πβ（ LS）－γ放射性活度国家基准设计的一套高性能电子学系统，与传统模拟符合相比，具有信号实时处理及存储等特点，可完成离线符合计算。论文介绍了符合计数系统的架构、工作流程以及数据传输格式和数据量，阐述了软件开发的流程和处理大数据量的方法， DMA的具体操作和后期离线数据处理程序。软件运行于基于PXI机箱的XP系统，可以达到30 Mbps的稳定写入速度，并提供了一个友好的人机界面。数据离线处理软件可以合并采集数据，根据不同需求产生有用的数据格式，方便后期统计计算。
4πβ－γ부합계수계통시위4πβ（ LS）－γ방사성활도국가기준설계적일투고성능전자학계통，여전통모의부합상비，구유신호실시처리급존저등특점，가완성리선부합계산。논문개소료부합계수계통적가구、공작류정이급수거전수격식화수거량，천술료연건개발적류정화처리대수거량적방법， DMA적구체조작화후기리선수거처리정서。연건운행우기우PXI궤상적XP계통，가이체도30 Mbps적은정사입속도，병제공료일개우호적인궤계면。수거리선처리연건가이합병채집수거，근거불동수구산생유용적수거격식，방편후기통계계산。
4πβ-γcoincidence counting system is a high-performance electronics system designed for 4πβ( LS) -γradioactivity primary standard.As compared with the conventional analog system, it can perform real-time signal processing and storage for the latter coincidence calculation.This paper introduces the architec-ture of the coincidence counting system and its workflow, as well as the format and the amount of data trans-ferred.It describes software development process and methods of processing large amounts of data, DMA specif-ic operations and offline data processing software.Software running on the XP system based on PXI chassis can achieve stable 30 MBps writing speed.Meanwhile, the software provides a friendly interface.Offline data pro-cessing software can merge data collection, generating useful data formats according to different needs, which facilitates statistical calculations.