中文摘要：

通过微通道板皮秒脉冲选通动态模型结合近贴聚焦系统的空间调制传递函数理论模型，研究了微通道板X射线分幅相机系统的动态空间分辨能力与屏压，近贴距离，皮秒选通脉冲的幅值与宽度等参数的关系．计算了常用参数下的微通道板行波选通X射线皮秒分幅相机的系统动态空间分辨率，讨论了提高相机动态空间分辨率的措施，提出了优化相机结构参数的方法．

英文摘要：

Picosecond X-ray framing camera with gated microchannel plate, shortened form MCP-XFC, is widely applied for some researches as a sort of very important ultrafast diagnosis instrument, such as the implosion of inertial confinement fusion （ICF） experiments, the laser-produced plasmas and Z-pinch. The dynamic spatial resolving power is discussed based on the theoretically models of picosecond （ps） voltage pulse gated MCP and spatial modulation transfer function （SMTF） with proximity focusing system. The relation is also analyzed between the dynamic spatial resolution and some parameters such as the voltage of phosphor screen, the interval of proximity focusing system, the voltage value and the pulse width of picosecond gated pulse. Under practical experiment condition, the compute value of dynamic SMTF with gated MCP-XFC is 24 lp/mm, and this value is accorded with the testing results 25 lp/mm of static spatial resolution. At last, some improved methods are put forward.