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2 September 2014 Analysis of electric vacuum characteristics of MCP
Xiang Gao, Feng Shi, Hong-chang Cheng, Lei Yin, Zhuang Miao, Xing Cheng, Long Wang, Sen Niu
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Proceedings Volume 9284, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronics Materials and Devices for Sensing and Imaging; 928411 (2014) https://doi.org/10.1117/12.2069628
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China
Abstract
In order to improve the electronic gain and luminance gain of low-light-level image intensifiers, microchannel plates(MCP) are adopted as the electron multiplier mechanism. According to the relevant experimental analysis, the resistance between channels is a limited value. Due to there are resistive coupling between any two adjacent channel of MCP, the electron transmission and the electron multiplication in a certain channel will be interfered by its adjacent channels, This phenomenon would affect the quality of image transmission and field of view of image intensifier. In low-light condition, the input current of MCP is small, the current gain of each channel is same, MCP has the area of linear current amplification and distortion-free image transmission. But when input current is large and close to saturation, lower current in channels has more current gain, leading to the contrast change of the image. This paper analyzes the transmission properties of electrons in the channels. It is proved that there is an electrical relationship between adjacent channels,throuht the circuit equations with relevant circuit parameters such as the resistance of secondary electron emission layer, resistance of resistive layer, the resistance between two adjacent channels, and so on. The analysis method and research results provide technical guidance for the improvement of electronic gain, luminance uniformity and preparation process of MCP.
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Xiang Gao, Feng Shi, Hong-chang Cheng, Lei Yin, Zhuang Miao, Xing Cheng, Long Wang, and Sen Niu "Analysis of electric vacuum characteristics of MCP", Proc. SPIE 9284, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronics Materials and Devices for Sensing and Imaging, 928411 (2 September 2014); https://doi.org/10.1117/12.2069628
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KEYWORDS
Microchannel plates
Resistance
Image intensifiers
Image quality
Analytical research
Contrast transfer function
Image transmission
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