平行平面电极聚焦系统的光束轮廓

Proceedings of the Sixteenth National Radio Science Conference. NRSC'99 (IEEE Cat. No.99EX249) Pub Date : 1999-02-23 DOI:10.1109/NRSC.1999.760949

F. Salam, O. Moustafa, H. El-Khabeary T.

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引用次数: 0

摘要

本文研究了用于静电离子源的五电极透镜中的电位分布。用不同的气体研究了光束的轮廓形状。在不同的性能、不同的初始束流半径、不同的离子电荷和不同的电压幅值比下，计算了N/sub / gas作用下束流沿轴向距离的半径。在N/sub - 2/ gas条件下，初始束半径为2.5 mm时，可以得到最小束半径为0.22 mm。本透镜构成聚光透镜。它比两个半球形电极和一个中间平面电极的情况下产生更聚焦的光束。

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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Beam profile of a parallel plane electrodes focusing system

The present work investigates the potential distribution in a five electrode lens to be used in an electrostatic ion source. The beam profile shape has been investigated using different gases. The radii of the beam profile along the axial distance using N/sub 2/ gas are calculated for different perveances, different initial beam radii, different ion charges, and different ratios of voltage magnitude. It has been found that a minimum beam radius of 0.22 mm can be obtained for initial beam radius equal 2.5 mm using N/sub 2/ gas. The present lens constitutes a convergent lens. It gives a more focused beam than the case of two hemispherical electrodes and an intermediate flat electrode.

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Proceedings of the Sixteenth National Radio Science Conference. NRSC'99 (IEEE Cat. No.99EX249)

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