X射线脉冲星导航探测器的微通道板甄选  

Selection of MCP for array X-ray pulsar navigation detector

作　　者：宋娟[1,2] 赵宝升[1] 盛立志[1] 刘哲[1] 刘永安[1] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《光学精密工程》2015年第2期402-407,共6页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.11103069)

摘　　要：根据应用于X射线脉冲星导航系统的大面阵X射线探测器对微通道板（MCP）性能的要求,研究了甄选微通道板的方法。确定了甄选微通道板的4个关键参量,分别是增益的均匀性、阻抗匹配、暗计数率、增益系数。针对这4个参量设计了相应的测试实验,制定了甄选MCP的流程,并对采用该流程甄选出的MCP进行了幅值和计数率的测试。测试结果显示：采用单通道阳极接收信号时,每一个探测单元的幅值存在的相对误差各不相同,第i个探测单元输出的信号幅值的最大相对误差Δ1i和最小相对误差Δ2i的波动分别为7%-13.5%,3%-6.7%;而采用四通道共享阳极时输出信号的Δ1i为7.8%、Δ2i为3.1%;单通道阳极计数率之和（n=n1＋n2＋n3＋n4）与四通道共享阳极计数率N的相对误差为4.38%,小于预估值10%。上述实验结果表明该甄选方法能够甄选出满足探测器要求的MCP。According to the demands of an array detector in the X-ray pulsar navigation system for Micro-channel Plate（MCP）,a selection method for the MCP was explored.Four key parameters for the selection of MCPs,the uniformity of gain,impedance matching,dark count rate and the gain coefficient were determined.Based on the four key parameters,corresponding experiments were designed and the selection process of MCPs was set out.The amplitudes and counting rates of MCPs selected by proposed method were tested.The tested results show that the relative error of each detection unit is not identical.When a single channel anode is used,the ranges of the maximum relative errorΔ1iand minimum relative errorΔ2iof the amplitudes for output signals from the ith anode are 7%-13.5%and 3%-6.7%,respectively,and when a four-channel anode is used,Δ1iandΔ2iare 7.8% and3.1%,respectively.Moreover,the relative error between the anode count rate n1＋n2＋n3＋n4fromthe single channel and Nfrom the four-channel shared anode is 4.38%,less than 10%.Obtained results indicate that the MCPs with good performance have been effectively chosen by the proposed selection method.

关 键 词：单光子探测 X射线探测器 脉冲星导航系统 微通道板(MCP) MCP甄选 脉冲幅值 计数率 

分 类 号：TN223[电子电信—物理电子学]