四维透射电子显微镜中电子枪电极板形状参数的设计与研究。

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION

Review of Scientific Instruments Pub Date : 2024-08-01 DOI:10.1063/5.0215794

He Chen, Quanlin Dong, Zhongwen Li

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引用次数: 0

摘要

对四维透射电子显微镜电子枪的加速电极进行了建模。推导了圆柱坐标系中轴上任意一点的电场分布一般表达式，并得到了电极板形状参数方程。确定了不同电极板参数下电场表达式的准确性，并进一步研究了电子枪电极的形状参数。这项工作可为透射电子显微镜电子枪的初始设计和四维电子枪的改造设计提供理论依据。

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Design and study of the shape parameters for the electrode plates of the electron gun in the four-dimensional transmission electron microscope.

The accelerating electrode of a four-dimensional transmission electron microscope electron gun is modeled. The general expression of the electric-field distribution is derived for any point on the axis in a cylindrical coordinate system, and equations for the shape parameters of the electrode plate are obtained. The accuracy of the field expression is determined for different electrode plate parameters, and the shape parameters of the electron gun electrode are further investigated. This work can provide a theoretical basis for the initial design of a transmission electron microscope electron gun and the retrofit design of a four-dimensional electron gun.

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来源期刊

Review of Scientific Instruments 工程技术-物理：应用

CiteScore

3.00

自引率

12.50%

发文量

758

审稿时长

2.6 months

期刊介绍： Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.