- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Some Optical Properties of an Electrostatic Immersion Lens Using the Charge Density Method | ||
| Iraqi Journal of Applied Physics | ||
| Article 1, Volume 1, Issue 4, 2005, Pages 21-27 | ||
| Authors | ||
| B.H. Hamad; A.K. Ahmad; S.M. Jumaa | ||
| Abstract | ||
| A computational investigation has been carried out in the field of nonrelativistic charged-particle optics using the charge density method as a boundary value problem with the aid of a personal computer under the absence of space-charge effects. This work has been concentrated on designing a two-electrode electrostatic immersion lens whose electrodes are cylindrical in shape separated by an air gap. The variable parameters of the two electrodes are the applied voltage ratio and the air gap separating them. The axial potential distribution of an electrostatic immersion lens has been computed by taking into consideration the distribution of the charge density due to the voltages applied on the two cylindrical electrodes. Potentials have been determined anywhere in space by using Coulomb’s law. The optical properties of the immersion lens have been investigated under finite and zero magnification conditions. | ||
| Keywords | ||
| Charge density method; Electrostatic immersion lens; Spherical and chromatic aberration | ||
|
Statistics Article View: 98 PDF Download: 25 |
||