一种大动态范围扫描变你的电子光学结构

提出并设计了一种旨在获得大的动态范围的扫描变像管的电子光学结构，用数值方法给出了有关电子光学设计参数，如时间、空间响应特性。该管型在保证大的阴极具有大的有效使用面积的情况下，极大地减小了光电子的渡越时间。由此减小空间电荷效应对扫描变像管性能的影响，从而改善扫描变像管的动态范围。通过对光电子在该系统内传输的模拟计算，得到脉冲半宽在0．5ps以上的脉冲的动态范围约在200的估算结果。

A New Electron Optics Configuration for a Streak Image Tube with Large Dynamic Range

We proposed and designed a novel electron optics configuration for the streak image tube aiming at relative large dynamic range.The tube features in its smaller focusing area and less electron transit time inside which can restrain the space charge effects effectively.Therefore it is hopeful to enlarge the dynamic range The temporal and spatial characteristic,such as spread functions,are given by numerical method.By simulating the transit inside the system the result of the dynamic range of 200 round is obtained for pulse of 0.5 ps in FWHM.