远紫外感应电荷交叉延迟线阳极光子计数成像探测器关键技术研究

项目名称： 远紫外感应电荷交叉延迟线阳极光子计数成像探测器关键技术研究

项目编号： No.61475154

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 尼启良

作者单位： 中国科学院长春光学精密机械与物理研究所

项目金额： 94万元

中文摘要： 目前，使用微通道板（MCP）和二维位置灵敏阳极的紫外光子计数成像探测器在我国空间天文学、空间天气预报、空间遥感、深空探测、光电对抗等领域有重要的应用背景及迫切需求。为解决现有的探测器由于MCP的电子云在金属阳极上产生的二次电子导致的图像非线性及不稳定性，本项目提出了一种具有感应电荷交叉延迟线（XDL）阳极的远紫外（FUV）光子计数成像探测器，它利用一个电阻阳极直接收集来自MCP的电子云，同时在其后面的XDL阳极上产生感应电荷，既提高了XDL阳极的空间分辨率、计数率等性能，又避免了电子云直接与XDL阳极作用产生的二次电子所导致的图像非线性。拟通过解决高量子效率FUV波段光电阴极制备、高性能感应电荷XDL阳极制作、高信噪比位置读出电路的研制等关键技术，研制波长范围115nm-180nm的光子计数成像探测器，为未来空间应用做前期基础性研究。

中文关键词： 远紫外；交叉延迟线阳极；光子计数成像探测器；感应电荷；图像非线性

英文摘要： Currently, the ultraviolet (UV) photon-counting imaging detector with microchannel plate (MCP) and two-dimensional position-senstive anode have important applications and urgent need in many fields such as space astronomy, space weather forecast, space remote sensing, deep space exploration and electrooptical countermeasures and so on. In order to solve smoe difficult problems on the image nonlinearity which come from the redistribution of charge by secondary electron emission from the surface of the anode into the gap between the anode and MCP stack, we introduce a kind of far ultraviolet (FUV) photon-counting imaging detector based on an induced-charge cross delay line (XDL) anode, the detector use a resistive anode to collect electron cloud from MCP stack and produce induced charge on XDL anode behind the resistive anode, this will improve both space resolution, total count rate, time resolution and produce the image with good linearity due to preventing MCP stack's electron cloud from directly falling on the XDL anode. We will succeed in developing the photon-counting imaging detectors in far-ultraviolet(FUV) 115nm-180nm band after overcoming some key technical problems such as the fabrication of the cathode with high efficiency quantum, the manufacture of induced charge cross dalay line anode with good performances and the development of position readouts with high signal-to-noise ratio (SNR), this will be the fundamental research for this kind of detector which will be used in space appliactions in the future.

英文关键词： Far ultraviolet;Cross delay line anode;Photon-counting imaging detector;Induced charge;Image nonlinearity