Graphical offline analysis software of electron multiplier pulse signals北大核心CSCD

电子倍增器（electron multiplier，EM）工作于脉冲状态下，其阳极上输出离散的信号，考虑到电子倍增过程具有一定的统计性规律，研究EM在脉冲状态下的性能参数，需要对阳极输出的脉冲信号进行大量测试和分析。以基于打拿极电子倍增器的光电倍增管（photomultiplier tubes，PMT）为例，通过改变入射光强度使其工作在脉冲状态，利用高带宽、高采样率示波器采集其阳极输出信号。基于Python开发了一种图形化数据分析软件，用来对示波器采集的大量脉冲信号数据进行离线分析，从中可以获得PMT的电荷积分谱、增益、分辨率、后脉冲率、前沿时间等性能参数，软件采用模块化结构，根据不同的测试需求各个模块可以单独工作。该软件可以快速实现EM在脉冲状态下的性能参数分析，为EM制作工艺的优化及其在微弱信号探测领域中的应用提供了一种便利的分析手段。

Graphical offline analysis software of electron multiplier pulse signals

When the electron multiplier (EM) works in a pulse condition, the discrete signals are output on its anode. Since the electron multiplication process has a certain statistical law, to study the performance parameters of the EM in a pulse condition, the substantive tests and analyses of the pulsed signal output from the anode were required. The photomultiplier tube (PMT) based on a dynode EM was taken as an example, by changing the incident light intensity to make it work in a pulse condition, a high-bandwidth and high-sampling-rate oscilloscope was used to collect its anode output signal. A graphical data analysis software was developed based on Python to perform the offline analysis on a large number of pulse signal data collected by an oscilloscope, and performance parameters such as charge integral spectrum, gain, resolution, post-pulse rate, and leading-edge time of PMT could be obtained. The software adopted a modular structure, and each module could work independently according to the different test requirements. The proposed software can quickly analyze the performance parameters of the EM in a pulse condition, and provides a convenient analysis method for the optimization of the EM fabrication process and its application in the field of weak signal detection.