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微通道板出射电荷云尺寸与微通道板增益、微通道板输出面和楔条形阳极间距离以及阳极加速电压等因素有关.到达阳极的电荷云尺寸对紫外光子计数探测器的成像性能有重要影响.本文研究了电荷云尺寸对紫外光子计数成像系统成像性能的影响,论述了调制畸变和“S”畸变两种图像畸变及其产生的原因,采用蒙特卡洛方法模拟了不同尺寸的电荷云对阳极解码的影响.实验测试了微通道板和阳极间距离、微通道板增益以及阳极加速电压对紫外光子计数成像系统成像性能的影响,并给出了实际解决调制畸变和“S”畸变的有效方法.
The charge cloud size of the microchannel plate is related to the gain of the microchannel plate, the distance between the output face of the microchannel plate and the wedge-shaped anode, and the accelerating voltage of the anode, etc. The size of the charge cloud reaching the anode is important for the imaging performance of the UV photon counting detector The influence of charge cloud size on the imaging performance of UV photon counting imaging system is studied in this paper. The distortion and the reason of modulation aberration and distortion of “S ” distortion are discussed. The Monte Carlo method is used to simulate the effects of different size The effect of charge cloud on the anode decoding was investigated experimentally to test the effect of the distance between microchannel plate and anode, the gain of microchannel plate and the acceleration voltage of anode on the imaging performance of UV photon counting imaging system. "Effective method of distortion.