极紫外波段微通道板光电子产出理论分析与实验测量  

Theoretical Analysis and Experimental Measurement for Secondary Electron Yield of Microchannel Plate in Extreme Ultraviolet Region

作　　者：李敏[1,2] 尼启良[1] 董宁宁[1,2] 陈波[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,应用光学国家重点实验室,吉林长春130033 [2]中国科学院研究生院,北京100049

出　　处：《光谱学与光谱分析》2010年第8期2030-2034,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(40774098,60677043)资助

摘　　要：基于微通道板的光子计数探测器在天文方面得到广泛的应用。该文针对微通道板在极紫外波段的光电子产出进行深入研究,给出了材料光电子产出的理论模型,利用导出的光电子产出公式分析了影响微通道板电极和铅玻璃两种材料光电子产出的因素。理论分析结果表明:材料厚度大于20nm及入射角大于掠入射的临界角是获得较高光电子产出的最佳条件,除去几个特殊波长,两种材料的光电子产出在极紫外波段随波长的增加而减小。利用激光等离子光源量子效率测量装置测量了微通道板光电子产出的波长响应特性,实验结果与理论计算结果基本一致。Photon counting detectors based on microchannel plate have widespread applications in astronomy.The present paper deeply studies secondary electron of microchannel plate in extreme ultraviolet.A theoretical model describing extreme ultraviolet-excited secondary electron yield is presented,and the factor affecting on the secondary electron yields of both electrode and lead glass which consist of microchannel plate is analyzed according to theoretical formula derived from the model.The result shows that the higher secondary electron yield is obtained under appropriate condition that the thickness of material is more than 20 nm and the grazing incidence angle is larger than the critical angle.Except for several wavelengths,the secondary electron yields of both electrode and lead glass decrease along with the increase in the wavelength.And also the quantum efficiency of microchannel plate is measured using quantum efficiency test set-up with laser-produced plasmas source as an extreme ultraviolet radiation source,and the result of experiment agrees with theoretical analysis.

关 键 词：微通道板 极紫外 光电子 量子效率 

分 类 号：O434.1[机械工程—光学工程]