Measurement conditions study on MCP current gain of the third generation low-light-level image intensifier tube

Lei Yin; Xiao-feng Bai; Liu Feng; Ying-ping He; Xiang Gao

doi:10.1117/12.2033696

16 August 2013 Measurement conditions study on MCP current gain of the third generation low-light-level image intensifier tube

Lei Yin, Xiao-feng Bai, Liu Feng, Ying-ping He, Xiang Gao

Author Affiliations +

Proceedings Volume 8912, International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications; 89120Q (2013) https://doi.org/10.1117/12.2033696
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

In order to improve the measurement accuracy of MCP current gain and provide highly reliable feedback to the MCP production, based on MCP current gain test principle, a device with adjustable incident illumination for measuring the MCP current gain was established. Under MCP voltage of 800V, 900V, and 1000V, incident illumination of photocathode varying from 0.1mlx to 8mlx, MCP current gain by this device was measured. According to the curves of current gain, we knew more about the relationship among MCP current gain, MCP voltage and photocathode incident illumination. It was indicated that MCP current gain saturation was not obvious with photocathode incident illumination less than 6mlx and MCP voltage 800V, while with more than 4mlx and 900V, the MCP current gain began to saturate, and with more than 1mlx and 1000V, the MCP current gain began to saturate. Owing to the characterizations of MCP, the reason why the MCP current gain decreased was analyzed. With the MCP voltage of the 3rd generation low-light-level image intensifier tube ranging between 800V and 1000V, the photocathode incident illumination for MCP current gain measurement should be less than 1mlx. In this study, the determined range of photocathode incident illumination during MCP current gain measurement and the improved test accuracy of the MCP current gain provides effective reference for the production procedure of the 3rd generation low-light-level image intensifier tube.

Citation Download Citation

Lei Yin, Xiao-feng Bai, Liu Feng, Ying-ping He, and Xiang Gao "Measurement conditions study on MCP current gain of the third generation low-light-level image intensifier tube", Proc. SPIE 8912, International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications, 89120Q (16 August 2013); https://doi.org/10.1117/12.2033696

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KEYWORDS

Microchannel plates

Image intensifiers

Light sources

Image enhancement

Luminous efficiency

Electrodes

Image processing

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