The Magnetic Electron Lens

1941 ◽  
Vol 9 (4) ◽  
pp. 204-207 ◽  
Author(s):  
A. L. Hughes
Keyword(s):  
Electron Lens ◽  
Magnetic Electron

On the magnetic electron lens of minimum sphrical aberration

1978 ◽  
Vol 36 (1) ◽  
pp. 24-25
Author(s):  
S. Suzuki ◽  
A. Ishikawa
Keyword(s):  
Spherical Aberration ◽  
Resolving Power ◽  
Objective Lens ◽  
Lens Design ◽  
Magnetic Lens ◽  
Initial Voltage ◽  
Path Distance ◽  
Electron Lens ◽  
Image Position ◽  
Magnetic Electron

For the development of the electron microscope, in which high resolving power is demanded, it is important to construct an electron objective lens with minimum spherical aberration.In 1943, one of the authors published the paper on the approximate calculation of the electromagnetic field to give a minimum spherical aberration and also published the papers on small spherical aberration lens design based on this calculation.We will speak a comparison between the experimental results and the numerical calculations in practical cases.The following line shows the method to get more strictly minimum spherical aberration of magnetic lens.In a space charge free electron optical system, where a pure magnetic lens is concerned, differential equation for paraxial electron path is given byU being the initial voltage applied to the electron beam and γ the path distance from the optical axis Z.

scholarly journals On electron movement through magnetic electron lens

2008 ◽  
Vol 1 (1) ◽  
pp. 207-215 ◽  
Author(s):  
A.A. Melnikov ◽  
O.D. Potapkin
Keyword(s):  
Electron Lens ◽  
Magnetic Electron

scholarly journals Design and Fabrication of the Single Polepiece Magnetic Electron Lens of Truncated Cone Polepiece Shape

2011 ◽  
Vol 19 (3) ◽  
pp. 49-54
Author(s):  
Muna A. Al-Khashab ◽  
Abdullah I. Mostafah ◽  
Issam I. Ismail
Keyword(s):  
Truncated Cone ◽  
Electron Lens ◽  
Magnetic Electron
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