作　　者： ; ; ; ; ; ;

机构地区： 深圳大学光电工程学院光电子器件与系统教育部重点实验室

出　　处： 《强激光与粒子束》 2011年第10期2683-2686,共4页

摘　　要： 为获得能够实际应用的飞秒时间分辨软X射线变像管,提出并完成了一种新的扫描变像管管型的理论设计。新管型采用五电极平面对称静电柱透镜,它易于对电子束进行强聚焦,且没有轴对称透镜的电子束聚焦交叉点,由此可以缩短变像管长度,减小渡越时间弥散和抑制空间电荷效应,从而提高动态范围和时间分辨率。通过模拟计算得到:在光电子初能量色散半高宽为1.6eV、狭缝面积为10mm×20μm、时间分辨能力为500fs时,软X射线变像管有用的动态范围约100倍。 The research of inertial confinement fusion demands a streak image tube with femtosecond temporal resolution and large dynamic range.In order to obtain a setup in the practical application,a novel soft X-ray streak image tube was proposed and designed.A planar symmetric electrostatic cylindrical lens with five electrodes was introduced into the image tube model,which has a strong ability to focus the electron beam,and has no cross-over effects as in the axial-symmetrical system.The cylindrical lens can shorten the length of image tube,reduce the transit time dispersion,and restrain space charge effects,thus enlarging the dynamic range and improving the temporal resolution.The simulation results show that if the photoelectron＇s initial energy spread is 1.6 eV,and the slit area is 10 mm×20 μm,the useful dynamic range of 100 is obtained with 500 fs temporal resolution.

关 键 词： 射线 变像管 动态范围 时间分辨 诊断

领　　域： [一般工业技术] [核科学技术]