防离子反馈MCP噪声因子测试与分析  

Analysis and test on noise factor of Micro-channel plate with ion barrier film

作　　者：朱宇峰 石峰 刘术林 张妮 聂晶 张太民 刘晓健 钱芸生[2] 

机构地区：[1]微光夜视技术重点实验室,陕西西安710065 [2]南京理工大学,江苏南京210094

出　　处：《红外与激光工程》2013年第2期499-502,共4页Infrared and Laser Engineering

基　　金：国防预研基金

摘　　要：噪声因子是输入信噪比和输出信噪比的比值,能够反映微通道板的噪声特性,是影响微光像增强器信噪比的主要因素。为探寻降低微光像增强器中防离子反馈微通道板噪声因子的技术途径,根据微通道板噪声因子定义和测试原理,构建了防离子反馈微通道板噪声因子测试系统。由于防离子反馈微通道板的输入面镀覆有一层薄膜,其对微通道板的噪声因子有较大影响。因此,利用噪声因子测试系统重点测试了有、无防离子反馈膜以及不同材料、不同孔径、不同输入电子能量、不同微通道板作电压条件下的微通道板噪声因子,获得了微通道板噪声因子与输入电子能量、微通道板电压之间的关系,为降低防离子反馈微通道板噪声提供了有效的技术指导。The noise factor,which is the main factor affecting the noise performance of image intensifier and can accurately reflect the noise characteristics of the microchannel plate,is the ratio of the input signal to noise ratio and the output signal to noise.According to definition of noise factor of microchannel plate and test principle,filmed MCP test system was established in order to study the technical way to reduce noise factor of MCP.The input surface of the MCP was covered with ion feedback film,which had a great impact on the noise factor of the MCP.Hence,noise factor of filmed MCP and un-filmed MCP were measured respectively,and the noise factor with different material, different channel pore,different incident electrons and MCP voltage were measured too.Relationships between noise factor and incident electron,noise factor and MCP voltage was obtained.That was valuable to reduce the noise of filmed MCP.

关 键 词：噪声因子 微通道板 像增强器 防离子反馈膜 

分 类 号：TN223[电子电信—物理电子学]