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Gain characteristic of ultraviolet single photon imaging system

Zhao Bao-Sheng Zhu Xiang-Ping Zhang Xing-Hua Liu Yong-An Miao Zhen-Hua Zhao Fei-Fei

Gain characteristic of ultraviolet single photon imaging system

Zhao Bao-Sheng, Zhu Xiang-Ping, Zhang Xing-Hua, Liu Yong-An, Miao Zhen-Hua, Zhao Fei-Fei
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  • Abstract views:  3432
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  • Received Date:  17 June 2008
  • Accepted Date:  19 August 2008
  • Published Online:  20 March 2009

Gain characteristic of ultraviolet single photon imaging system

  • 1. (1)中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安 710119; (2)中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安 710119;中国科学院研究生院,北京 100049

Abstract: Single-photon-counting imaging technology has been widely used in ultraweak bioluminescence, space environment detection and nuclear radiation detection. The structure and working principle of an ultraviolet single photon imaging system based on the microchannel plates and the wedge and strip anode are introduced. The gain characteristic of dark count of two and three microchannel plates is investigated under different voltages respectively. The experimental and fitted results show that the dark count pulse height distribution of microchannel plate has exponential distribution, and the dark count rate rises as the voltage increases. It is shown that the gain becomes more homogeneous as the voltage increases by measuring the pulse height distribution under different voltages. Then the effects of microchannel plate voltage and distance on system resolution with two microchannel plates are tested. It is revealed that the system resolution rises as the voltage of microchannel plate increases, and can be improved also by increasing the distance of microchannel plate properly.

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