The quantum yield formula for uniform-doping GaAIAs/GaAs transmission-mode photocathodes is revised by taking into account the light absorption in the window layer.By using the revised quantum yield formula,the domest...The quantum yield formula for uniform-doping GaAIAs/GaAs transmission-mode photocathodes is revised by taking into account the light absorption in the window layer.By using the revised quantum yield formula,the domestic and ITT's experimental quantum yield curves are fitted and the fitted curves match well with the experimental curves.In addition,the fit results show that the integral sensitivity and quantum yield of domestic image intensifier tube has achieved 2130μA/lm and 45%,nearly reaching ITT's third generation level in 2002,whereas the discrepancy in cathode performance is mainly embodied in the electron diffusion length and back interface recombination velocity.展开更多
A halo tester is designed to analyze the halo formation in low-light-level（LLL） image intensifiers and the influencing factors on halo size.The tester is used to collect a 0.1922-mm hole image directly using a CoolS...A halo tester is designed to analyze the halo formation in low-light-level（LLL） image intensifiers and the influencing factors on halo size.The tester is used to collect a 0.1922-mm hole image directly using a CoolSNAPK4 charge-coupled device（CCD） in a darkroom under illumination conditions between 10？2 and 10？4 lx.The practical measurement result shows that the amplification ratio is 343.4.Then,the super second-and third-generation image intensifiers are placed after the hole,and the halo sizes of the hole images on the screens are determined as 0.2388 and 0.5533 mm,respectively.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10794125,60808006,60821004,61078051 and 60978017.
文摘The quantum yield formula for uniform-doping GaAIAs/GaAs transmission-mode photocathodes is revised by taking into account the light absorption in the window layer.By using the revised quantum yield formula,the domestic and ITT's experimental quantum yield curves are fitted and the fitted curves match well with the experimental curves.In addition,the fit results show that the integral sensitivity and quantum yield of domestic image intensifier tube has achieved 2130μA/lm and 45%,nearly reaching ITT's third generation level in 2002,whereas the discrepancy in cathode performance is mainly embodied in the electron diffusion length and back interface recombination velocity.
文摘A halo tester is designed to analyze the halo formation in low-light-level（LLL） image intensifiers and the influencing factors on halo size.The tester is used to collect a 0.1922-mm hole image directly using a CoolSNAPK4 charge-coupled device（CCD） in a darkroom under illumination conditions between 10？2 and 10？4 lx.The practical measurement result shows that the amplification ratio is 343.4.Then,the super second-and third-generation image intensifiers are placed after the hole,and the halo sizes of the hole images on the screens are determined as 0.2388 and 0.5533 mm,respectively.
