摘要
针对空间天文、生物荧光、光谱测量等领域对高灵敏、大面阵探测器的应用需求,研制出基于感应读出方式的延迟线阳极光子计数成像探测器。该探测器由微通道板、延时线阳极以及读出电路组成,其中延时线阳极的性能直接影响探测器的成像质量。作为一种电荷感应读出延时线阳极,该阳极利用信号到达的时间差解码入射光子的位置,可获得高的探测灵敏度和大的成像面积,同时简化了工艺难度并提升了可靠性。设计了感应读出延时线阳极,理论分析了探测器不同设计参数及材料对感应电荷量的影响,提出了解决异层电极间感应电荷量难以平衡的方法。据此研制出了收集面积为40 mm×40 mm的位敏阳极。测试结果表明该阳极信号传输衰减小于10%,极间串扰小于3%。利用该阳极进行了光子计数成像实验,获得了优于150μm的空间分辨率,为研制可应用于天文紫外光谱测量的大面阵、高灵敏探测器提供了理论依据及实验指导。
In this paper,we developed a photo-counting imaging detector based on the delay-line anode with induction readout,which has the advantages of high sensitivity and large detective area features.This novel detector is expected to be used in space astronomy,bioluminescence and spectral measurement applications.This detector consists of a microchannel plate(MCP),position-sensitive anode and readout.Among these key parameters,the performance of position-sensitive anode decides the performances of detectors to a large extent.As a charge induction readout delay line anode,the delay line anode decodes the position information of the incident photon by measuring the time delay between two ends of a propagation line.The detector with the anode can obtain high detection sensitivity and a large imaging area.Image charge pickup anode is placed outside the sealed vacuum tube,which not only simplifies the process difficulty of anode production but also improves the detector's reliability.Firstly,An inductive readout delay line anode was designed.We analyzed the influence of different thicknesses and mediums material of the detector on the induction charge of the position-sensitive anode.Then,a method is used to tackle the induction charge of different layers unbalance issue.After that,we designed and fabricated a 40 mm×40 mm position-sensitive anode.The experiment results indicate that the transmission attenuation of the anode output is less than 10%,and the inter-pole crosstalk is less than 3%.Finally,we implemented aphoton-counting imaging experimental system based on this anode.This experimental system provides better than 150um spatial resolution and can promote the theoretical and practical development of large-area array and highly sensitive detector for space astronomical UV spectrum measurement.
作者
张蕊利
刘永安
张亚龙
杨向辉
刘哲
苏桐
赵宝升
盛立志
ZHANG Rui-li;LIU Yong-an;ZHANG Ya-long;YANG Xiang-hui;LIU Zhe;SU Tong;ZHAO Bao-sheng;SHENG Li-zhi(State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China;School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2024年第5期1291-1296,共6页
Spectroscopy and Spectral Analysis
基金
国家重点实验室基金项目(SKLIPR2021)
陕西省自然科学基础研究计划项目(2023-JC-ZD-40)
中国科学院西部青年学者(XAB2020YN13)
国家自然科学基金项目(62271483)
陕西省自然科学基础研究计划(面上项目)(2021JM-214)资助。
关键词
探测器
光子计数成像
位敏阳极
空间分辨
光谱测量
The detector
Photon counting imaging
Position-sensitive anode
Spatial resolution
Spectral measurement
