空间应用低噪声曲面微通道板

项目名称： 空间应用低噪声曲面微通道板

项目编号： No.61275152

项目类型： 面上项目

立项/批准年度： 2013

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： 96万元

中文摘要： 对于大视场、高分辨率、高灵敏度的软X射线-真空紫外波段空间成像探测仪器，需要使用低噪声曲面微通道板（MCP）两维光子计数位置灵敏阳极成像探测器。 本课题以低噪声曲面MCP为研究对象，在研制无放射性同位素含量低噪声玻璃的基础上，通过采用高温成型和光学加工相结合的方式制备低噪声曲面MCP来消除因放射性同位素产生的暗计数，研究低噪声玻璃的成份、制作过程、几何结构、高温成型过程与曲面MCP在光子计数工作模式下的增益、脉冲高度分布、暗计数率的关系，揭示MCP暗计数产生的物理机制。研究使用低噪声曲面MCP和感应电荷位置灵敏阳极光子计数成像探测器的空间分辨率、暗计数率等特性，为空间应用奠定基础。

中文关键词： 低噪声微通道板玻璃；低噪声曲面微通道板；楔条形阳极；感应电荷；光子计数成像探测器

英文摘要： Soft X-ray and vacuum ultraviolet imaging instruments need to employ two-dimensional photon-counting imaging detector with low dark noise microchannel plate (MCP)stack in some space applications which require large field of view, high resolution and sensitivity. In the project,both a thermal slumping technique and a optically polishing method are used to fabricate low dark noise curved surface MCP having the large length-to-diameter (L/D) ratio and low resistance based on the development of low dark noise glass with elimination of radioactive isotopes which is a main niose source in MCPs. We will reveal the relationship between the components in MCP glass, MCP fabricating process, geometry structure, thermal slumping process and MCP's gain , pulse height distribution, background noise rate in photon-counting operating mode, and research physical mechanism of MCP dark noise. We also study the sapce resolution and background noise rate of a photon-counting two-dimensional imaging detector with low dark noise curved surface MCP and induced charge position-sensitive anode.

英文关键词： low dark noise microchannel plate glass；low dark noise curved surface microchannel plate；wedge-strip anode；induced charge；photon-counting imaging detector