为了实现二维平面上以单光子的灵敏度探测光强分布,提出了一种基于多阳极光电倍增管的阵列型光子计数器。并通过高频甄别技术和等幅放大技术实现对光电脉冲的低噪声恒定放大、解串扰技术消除相邻像素间的串扰影响,最终完成了8×8阵列型光子计数器的研制。测试结果表明,本阵列型光子计数器的单像素的最大计数率为100MCPS,峰值光子探测效率约21.2％,帧频最高可以达到10 kHz,在1.8 m望远镜平台上可以稳定探测10等星以内的暗弱天体。

In order to detect the light distribution of a single photon in two-dimensional plane,an array photon counter based on MAPMT has been developed.Low noise amplification of photoelectric pulse is realized by high frequency selection technology,and crosstalk between adjacent pixels is eliminated by crosstalk cancellation technology.Finally,the development of 8×8 array photon counter is completed.The test results show that the maximum count of single pixel of the array type photon counting rate is 100MCPS,the peak photon detection efficiency is about 21.2％,and the highest frame frequency is 10 kHz.Dark objects brighter than stars of the tenth magnitude can be detected steadily by a telescope on the system of the 1.8 m.