Simple geometry gridless ion mirror.
Simple geometry gridless ion mirror.
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简单几何形状的无栅离子镜。
DOI：
10.1016/s1044-0305(00)00146-x
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发表时间：
2000
影响因子：
3.2
通讯作者：
Enke,CG
中科院分区：
文献类型：
--
作者：
Zhang,J;Gardner,BD;Enke,CG
圆柱形离子镜的无网格变体被设计成产生轴向上非线性且径向上几乎均匀的电场。该设计可能包括一个或两个由截锥体组成的腔室。与传统的单视场和多视场反射镜相比，这种新的设计概念产生的离子反射镜具有改进的能量聚焦。传统上，具有非线性场梯度的离子镜使用多个隔膜电极，向其施加不同的电压。在这项工作中，通过仅成形两个或三个电极并在电极上仅施加一个或两个电压来实现优化的非线性场分布。这里介绍的设计提供高分辨率和低离子色散。从离子源到检测器的 SIMION 性能模拟表明，对于动能变化为 7.5% 和 23.6% 的离子，分辨能力分别为 11 000 和 1750。
A gridless variation of the cylindrical ion mirror has been designed to create an electric field that is nonlinear in the axial direction and nearly homogeneous in the radial direction. The designs may include one or two chambers that consist of truncated cones. This new design concept yields ion mirrors with improved energy focusing over conventional single-field and multiple-field mirrors. Conventionally, ion mirrors with nonlinear field gradient use multiple diaphragm electrodes to which distinct voltages are applied. In this work, optimized nonlinear field distributions are achieved through shaping only two or three electrodes and applying only one or two voltages on the electrodes. The designs presented here offer high resolving power and low ion dispersion. SIMION simulations of performance from the ion source to the detector demonstrate resolving powers of 11 000 and 1750 for ions with kinetic energy variations of 7.5% and 23.6%, respectively.