超快日盲真空紫外光电倍增管的单光子响应机理及器件研究

项目围绕超快日盲紫外AlGaN光电倍增管的单光子探测和时间响应能力提升，利用阴极材料激活前的泵浦-探针飞秒瞬态响应光谱和阴极材料激活后的量子效率测试系统构建阴极材料单光子探测性能的闭环分析评价体系，同时结合高精度单光子计数系统、飞秒渡越时间分布测试系统实现针对超快光电倍增管整体性能的分析表征。进而开展围绕单光子探测和时间响应性能提升的极化增强和变组分变浓度掺杂复合结构优化设计，阴极Cs-O激活和衰减后激活的表面势垒重构机制研究，微通道板本底噪声抑制及双微通道板级联工艺优化、光电倍增管分压器结构设计、阳极读出方式优化等研究。为超快单光子探测光电倍增管能带裁剪、超快光谱响应调制、电子能量分布调制等提供系统指导。项目研究成果为激光技术、高能物理研究、光学仪器、物理化学分析、导弹预警、宇宙射线监测、天文学和地质探测及航空航天等领域急需的超快单光子探测日盲紫外光电倍增管制备提供有效理论指导和评价。

Focusing on the improvement of single photon detection and time response capability of ultrafast solar blind AlGaN photomultiplier tube, the project uses the pump probe femtosecond transient response spectrum before cathode material activation and the quantum efficiency test system after cathode material activation to build a closed-loop analysis and evaluation system of single photon detection performance of cathode material, combining with high-precision single photon counting system and femtosecond transit time The distributed test system can analyze and characterize the whole performance of the ultrafast photomultiplier. Furthermore, we carried out the optimization design of the composite structure of polarization enhancement and variable concentration doping around the single photon detection and time response performance improvement, the research of the surface barrier reconstruction mechanism after the activation and attenuation of cathode cs-o, the research of the background noise suppression of the microchannel plate, the optimization of the cascade process of the two microchannel plates, the structure design of the photomultiplier tube voltage divider, and the optimization of the anode readout mode. It provides systematic guidance for band clipping, ultrafast spectral response modulation, electron energy distribution modulation and so on. The research results of the project provide effective theoretical guidance and evaluation for the fast single photon detection day blind UV photomultiplier control equipment urgently needed in laser technology, high energy physics research, optical instruments, physical and chemical analysis, missile early warning, cosmic ray monitoring, astronomy and geological exploration, aerospace and other fields.