【作者】 夏松江； 汪建军； 郭之虞； 赵捷；

【Author】 Xia Songjiang Wang Jianjun Guo Zhiyu Zhao Jie (Dept of Tech Phys,Peking University;Institute of Heavy Ion Phys,Peking University,Beijing, 100871)

【机构】 北京大学技术物理系； 北京大学重离子物理研究所；

【摘要】 本文描述的开放式双参数系统是北京大学加速器质谱计(PKUAMS)数据获取与测量控制系统中的核心部件。为完成夏商周断代工程的目标,PKUAMS必须进行系统升级,即大幅度提高测量精度(0．5%～0．3%) 及提高测量产率(样品测量自动化)。为配合PKUAMS这一目标的实现,新设计的双参数系统实现了以下性能指标:①实现了在主控机控制下的远程操作;②数据获取采用DMA方式,死时间≤20μs;③活时间测量精度达到2ms;④感兴趣区可设置成椭圆形等多种形状。更多还原

【Abstract】 Open mode dual parameter system described in this paper is a core part of Peking University Accelerater Mass Spectrometer data acquisition, measuring and control system. PKUAMS has to be upgraded for completingthe goal of ’Xia, Shang and Zhou Dynastic Engineering’, that means the measuring accuracy isexpected to be better than 0.5% and the system should be easier to operate with higher throughput. To coordinate with the goal of PKUAMS, the specification of the new dual parameter system is asfollows:① remote operation under the control of the main computer,② DMA is used in data acquisition with the dead time ≤20μs, ③ the precision of life time is 2 ms,④ the ROI region can be set as aellipse or other type.更多还原