Analysis of the 3-Tube Symmetrical Electrostatic Unipotential Lens
- 1 April 1971
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 42 (5) , 1870-1876
- https://doi.org/10.1063/1.1660460
Abstract
The 3‐tube symmetrical electrostatic unipotential lens was analyzed in great detail. Starting from a mathematical expression for the axial potential distribution, the cardinal points and coefficients of spherical and chromatic aberration were obtained with the help of a digital computer. Values for S/R, the separation between the tubes, were taken equal to 0.25, 0.375, 0.5, 0.75, and 1.00 and the length of the central electrode, L/R, was varied from 0.25 to 2.00 in steps of 0.25. It was shown that the accelerating lens has a lower coefficient of spherical aberration than the decelerating lens. A comparison was made between the data obtained using the mathematical model and the relaxation technique. The agreement was excellent.This publication has 4 references indexed in Scilit:
- Measured Properties of Strong "Unipotential" Electron LensesProceedings of the Physical Society. Section B, 1949
- Calculation of Axially Symmetric FieldsJournal of Applied Physics, 1942
- Experimentelle Untersuchungen über den Öffnungsfehler elektrostatischer LinsenElectrical Engineering, 1941
- Determination of the Axial Potential Distribution in Axially Symmetric Electrostatic FieldsProceedings of the IRE, 1940