扫描电子显微镜冷场和热场电子阴极在生物样本研究中的主要特性的数学建模

IF 1.1 4区物理与天体物理 Q4 PHYSICS, APPLIED

Technical Physics Pub Date : 2024-09-27 DOI:10.1134/S1063784224070284

S. N. Mamaeva, A. N. Pavlov, N. A. Nikolaeva, G. V. Maksimov

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引用次数: 0

摘要

计算了热场和冷场电子阴极的主要发射特性。发射极表面形式用二阶表面近似，阳极用等势面近似。由 18 个一阶常微分方程组成的系统使用数值 Runge-Kutta 方法求解。结果得到了 "边界 "电子的轨迹，从而确定了光束的形状和尺寸以及电荷和电场强度的密度分布。通过对电子束参数的分析，可以确定使用热场电子阴极和冷场电子阴极的扫描电子显微镜在研究生物样品时的特殊性能。

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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Mathematical Modeling of the Main Characteristics of Cold Field and Thermal Field Electron Cathodes of Scanning Electron Microscopes in the Study of Biological Samples

Main emission characteristics of thermal field and cold field electron cathodes were calculated. Emitters surface forms are approximated by second-order surfaces and anodes are approximated by equipotential surfaces. Systems, consisting of 18 first order ordinary differential equations, are solved using the numerical Runge–Kutta method. As a result, trajectories of the “boundary” electrons were obtained, which determine beam shapes and sizes and density distributions charges and electric field strengths. Analysis of beam parameters let to determine special properties of scanning electron microscopes with thermal field electron cathodes and with cold field electron cathodes for studying biological samples.

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来源期刊

Technical Physics 物理-物理：应用

CiteScore

1.30

自引率

14.30%

发文量

139

审稿时长

3-6 weeks

期刊介绍： Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.