扫描型变象管Ｘ射线皮秒分幅相机在强Ｘ射线情况下，由于空间电荷效应，像质变坏，甚至无法工作。本文简述了ＭｇＦ２光阴极材料的性能，首次在Ｘ射线皮秒变象管分幅相机上的应用结果：降低了强Ｘ射线源情况下分幅管内空间电荷效应的影响，并获得了清晰的物理图象。 X-ray picosecond scanning sub-scanning camera in the case of strong X-ray, due to space charge effect, image quality deterioration, or even unable to work. In this paper, the properties of MgF2 photocathode material are briefly introduced. The results of the application of the X-ray picosecond viz., The first time to reduce the effect of space charge in the tube with strong X-ray source, and clear Physical image