Study of the Effect Range on Linear Magnification in the Change of the Different Geometry of Cylindrical Electrostatic Lenses of Three-electrode

Mohammed idrees kanaan albayati, Abdullah I. M. Alabdullah
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Abstract

Electrostatic lenses are designed using an array of electrodes with cylindrical apertures precisely arranged on a line of symmetry. In this research, four cylindrical three-electrode electrostatic lenses were designed, three of them with unusual geometric shapes and one with a traditional geometric shape, as the same electrical voltages and the same geometric parameters were applied to all the proposed lenses in both acceleration and deceleration modes. The optical properties of each lens designed in acceleration and deceleration modes were calculated to show the extent to which linear magnification is affected by the geometry of electrostatic lenses, and the results were compared between the proposed lenses. As the results prove that the electrostatic lens geometry has an important effect in increasing or decreasing the linear magnification range, the best lens is selected from among the four designed lenses based on its optical performance. It was found that the lens with the concave inner surface of the electrode has the best optical performance of the rest of the lenses, which shows that the concavity of the inner surface of the electrode has a direct effect on the properties of electrostatic lenses. Which lens' has the largest linear magnification range (1.0-2.4) and (1.4-3.74), respectively, in both acceleration and deceleration modes. The calculations were made using the program (SIMION8.0).
三电极圆柱静电透镜不同几何形状变化对线性放大倍率影响范围的研究
静电透镜是用一组电极设计的,这些电极的圆柱孔精确地排列在一条对称线上。在本研究中,设计了四个圆柱形三电极静电透镜,其中三个具有不同寻常的几何形状,一个具有传统的几何形状,在加速和减速模式下,对所有提出的透镜施加相同的电压和相同的几何参数。计算了在加速和减速模式下设计的每个透镜的光学特性,以显示静电透镜几何形状对线性放大倍率的影响程度,并比较了所提出透镜之间的结果。结果表明,静电透镜几何形状对增大或减小线性放大倍率范围有重要影响,并根据其光学性能从四种设计透镜中选择出最佳透镜。结果表明,电极内表面凹的透镜光学性能最好,说明电极内表面的凹度对静电透镜的光学性能有直接影响。在加速和减速模式下,哪个镜头的线性放大范围最大(1.0-2.4)和(1.4-3.74)?使用SIMION8.0程序进行计算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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