两电极静电同心球系统的近轴电子光学及其空间-时间像差  

Paraxial electron optics and its spatial-temporal aberrations for a bi-electrode concentric spherical system with electrostatic focusing

作　　者：周立伟[1] 公慧[1] 张智诠[2] 张轶飞[2] 

机构地区：[1]北京理工大学光电学院,北京100081 [2]装甲兵工程学院控制工程系,北京100072

出　　处：《物理学报》2010年第8期5459-5466,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60771070)资助的课题~~

摘　　要：将从近轴解出发研究两电极静电同心球系统的空-时轨迹及其像差.由近轴轨迹方程和近轴运动方程出发,先求解两电极静电同心球系统中自光阴极逸出的运动电子的近轴空间-时间轨迹,然后讨论此系统的静动态电子光学及其空间-时间像差,揭示近轴光学系统成像的一般规律.文中定义和推导了各级近轴空间像差和近轴时间像差,得到了与关于近轴空间-时间像差同样的结论,表明完全可以直接由近轴轨迹方程和近轴运动方程出发来研究理想成像及其空间-时间像差.In this paper,we use the paraxial equations to study the spatial-temporal trajectories and their aberrations for a bi- electrode concentric spherical system with electrostatic focusing. In the present paper,starting from the paraxial ray equation and the paraxial motion equation,the paraxial spatial-temporal trajectory of moving electron emitted from the photocathode is obtained for a bi-electrode concentric spherical system with electrostatic focusing. The paraxial static and dynamic electron optics,as well as the paraxial spatial-temporal aberrations in this system are then discussed,the general regularity of imaging in paraxial optical system has been explored. The paraxial spatial aberrations,as well as the paraxial temporal aberrations with different orders,have been defined and deduced. Thus we get same conclusions about paraxial spatial and temporal aberrations as it has been given in paper[1 ],and it completely shows that the paraxial spatial- temporal aberrations can be investigated directly from the paraxial ray equation and paraxial motion equation.

关 键 词：静态和动态成像的电子光学 近轴电子光学 近轴空间像差和时间像差 两电极静电同心球系统 

分 类 号：O463.1[机械工程—光学工程]