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在高压型多种加速器里,常用双圆筒和单透镜对束流进行加速和聚焦,这两种电透镜又经常被安装在离子源引出电极附近,这里粒子所获得的能量低,束流较强,空间电荷效应明显。文献[1、2]较好地讨论了某些电透镜中束流光学的一种传输矩阵法,文献[3—5]用成象光学法讨论了双圆筒、单透镜的成象光学参数;文献[6—8]用求解Laplace方程的方法将等径
In high-pressure type accelerators, double cylinders and single lenses are commonly used to accelerate and focus the beam. These two types of electrical lenses are often installed near the ion source extraction electrode where the particles acquire low energy and the beam current Strong, space charge effect is obvious. Literature [1, 2] discusses a kind of transfer matrix method of beam optics in some electric lenses, and literature [3-5] discussed the imaging optical parameters of double cylinder and single lens with imaging optics ; [6-8] use the method of solving Laplace equation will be equal diameter