Optimization of an electrostatic quadrupole doublet focusing systems
| Autor: | Oday A. Hussein, Omer Sise |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
01 natural sciences law.invention 03 medical and health sciences Optics Position (vector) law Physical and Theoretical Chemistry Spectroscopy Electrostatic lens Physics Radiation business.industry Distortion (optics) 010401 analytical chemistry Detector Image plane Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Lens (optics) Electron optics Quadrupole business 030107 microscopy |
| Zdroj: | Journal of Electron Spectroscopy and Related Phenomena. 217:11-15 |
| ISSN: | 0368-2048 |
| DOI: | 10.1016/j.elspec.2017.03.018 |
| Popis: | The imaging properties of an electrostatic quadrupole doublet lens were analyzed with the aid of computer simulation. The optimal electrode voltages which lead to stigmatic image in both planes of the quadrupole doublet lens with minimum spot size at position sensitive detector (PSD) were found for two operation modes: point-to-point focusing and parallel-to-point focusing. The optical properties as: Magnifications, spot sizes in the image plane and aberration figures were discussed. The results showed that the focusing of the lens was strong in the xy-plane in comparison with the focusing in the xz-plane. The distortion of the image was greater when the image position will be close to the lens in comparison with object position. Also, the imaging properties were very sensitive to the lunching angle of the electron-beam. (C) 2017 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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