Improvement of the optical performance of the geometrical parameters of Snorkel magnetic lens
Other Title(s)
تحسين الأداء البصري للمعلمات الهندسية لعدسة سنوركل المغناطيسية
Joint Authors
al-Shamma, Marwah T.
al-Khashshab, Muna A.
Source
Issue
Vol. 28, Issue 1 (28 Feb. 2019), pp.85-97, 13 p.
Publisher
University of Mosul College of Science
Publication Date
2019-02-28
Country of Publication
Iraq
No. of Pages
13
Main Subjects
Topics
Abstract EN
Two models of asymmetrical magnetic objective lens geometries have been designed and studied.
These two models are called Pinhole and Snorkel lenses.
The comparison between these models was realized by the aid of simulation EOD program (Electron Optical Design), using the finite element method to analyze the magnetic flux density and optical properties at constant excitation (NI=2000A-t).
The optimal model (Snorkel Lens) gives the best characteristics that were compatible with the research purposes in details, such as the changing of air gap and the axial polepiece bore diameter on the optical performance of the snorkel magnetic lens.
This type of lens was used in low energies scanning electron microscope (SEM), which achieved the lowest values of the aberrations coefficient at long working distance.
American Psychological Association (APA)
al-Shamma, Marwah T.& al-Khashshab, Muna A.. 2019. Improvement of the optical performance of the geometrical parameters of Snorkel magnetic lens. Rafidain Journal of Science،Vol. 28, no. 1, pp.85-97.
https://search.emarefa.net/detail/BIM-895037
Modern Language Association (MLA)
al-Shamma, Marwah T.& al-Khashshab, Muna A.. Improvement of the optical performance of the geometrical parameters of Snorkel magnetic lens. Rafidain Journal of Science Vol. 28, no. 1 (2019), pp.85-97.
https://search.emarefa.net/detail/BIM-895037
American Medical Association (AMA)
al-Shamma, Marwah T.& al-Khashshab, Muna A.. Improvement of the optical performance of the geometrical parameters of Snorkel magnetic lens. Rafidain Journal of Science. 2019. Vol. 28, no. 1, pp.85-97.
https://search.emarefa.net/detail/BIM-895037
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 96-97
Record ID
BIM-895037