论文部分内容阅读
近年来,倾斜型电磁聚焦系统是迅速发展起来的一种新型成象系统,它能有效地使用不透明光阴极,特别是对紫外光灵敏的光阴极和Ⅲ一Ⅴ族光阴极。这种系统的电子光学场是一种均匀交叉场,即均匀磁场B相对于与光轴平行的均匀电场E错开一个角度。与一般的象增强器不同的是,不透明光阴极位于倾斜型象管的后面,而屏靶在前面,两者恰好颠倒了一下,并且还错开一个位置。本文从电子在交叉的均匀复合场下的运动方程出发,引入随动坐标系,导出了描写系统中电子运动轨迹的另一种表达式与象差方程;编制了设计倾斜型象管的通用程序;计算
In recent years, tilt-type electromagnetic focusing system is rapidly developed a new imaging system, which can effectively use the opaque photocathode, especially sensitive to UV light photocathode and III-V family of photocathode. The electron optical field of such a system is a uniform crossed field, that is, the uniform magnetic field B is shifted by an angle with respect to the uniform electric field E parallel to the optical axis. Unlike conventional image intensifiers, the opaque photocathode is located behind the angled tube and the screen target is in the front, both of which are exactly upside down and also offset by one position. Based on the equations of motion of the electrons in the crossed uniform composite field, a new coordinate system is introduced to derive another expression and aberration equation of electron trajectory in the description system. A general program ; Calculation