International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
Call for Papers | Fully Refereed | Open Access | Double Blind Peer Reviewed

ISSN: 2319-7064


Downloads: 137 | Views: 310

Research Paper | Physics Science | Iraq | Volume 6 Issue 2, February 2017 | Popularity: 6.6 / 10


     

The Effect of Cross-Section Area of Electron Beam on the Aberration of Einzel Electrostatic Lens

Dr. Samir Khudhir Al-ani, Nada Abdulfatah Khattab


Abstract: A theoretical study by using computer model is presented by fitting an axial electrostatic potential distribution to polynomial function of fourth order from which the paraxial ray equation is solved to obtain the trajectory of particle that satisfy the suggested potential function. The distribution of the axial potential up or on the lens of length (22mm) has been carried out using Laplace equation by using Finite element method. , the results are obtained for Cs and Cc normalized in terms of the results showed low value of spherical and chromatic aberration comparing with other searches about ( 2.42) for spherical aberration and ( 0.03) of chromatic aberration, of this study showed small values of spherical and chromatic aberration, with values of area of which considered as ( 3mm2).


Keywords: Electron Optics, Einzel Lens, Electrostatic Lens, spherical aberrations, chromatic aberrations


Edition: Volume 6 Issue 2, February 2017


Pages: 355 - 357



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Dr. Samir Khudhir Al-ani, Nada Abdulfatah Khattab, "The Effect of Cross-Section Area of Electron Beam on the Aberration of Einzel Electrostatic Lens", International Journal of Science and Research (IJSR), Volume 6 Issue 2, February 2017, pp. 355-357, https://www.ijsr.net/getabstract.php?paperid=ART2017551, DOI: https://www.doi.org/10.21275/ART2017551