设计了一种飞秒条纹变相管．采用静电聚焦，用Monte Carlo方法对光电子的初能量、初角度以及初位置进行抽样；用有限差分法计算阴极和栅极之间以及偏转板之间的电场分布；用四阶Lunge－Kutta法模拟跟踪大量(3000个)光电子的运行轨迹；统计分析了3000个电子在最佳像面上的时间分布、位置分布；给出了变相管的空间调制传递函数、时间分辨能力等基本参量．其时间分辨能力可望达到290．4fs．

A femoto-streak image tube has been designed,in which a static electrode was used as the focus lens. The distribution of the initial kinetic energy,the initial azimuth angle,elevation angle and position of the photoelectrons were sampled with Monte Carlo method. The spatial electric field strength was calculated with Finite Difference method,and the trajectories of 3000 photoelectrons were calculated with fourth Runge-Kutta method. After analysis the spatial and temporal distribution of the electrons on the optimum plane,the basic character parameters such as the spatial transfer function and temporal resolution et al of the image tube were provided,the total temporal resolution of the image tube was expected to reach to 290.4 fs.