Mohammed Abdullah

Kirkuk University · Department of Physics

In this paper, the optical properties of biocompatible agarose and chitosan doped molybdenum complex composite thin films are reported. Thin films were obtained by spin coating of doped chitosan and agarose on soda-lime glass microscope slide. The cluster solution was prepared under mild heating and then a chitosan powder was dissolved in the solut...

The effect of operation modes of condensing magnetic lenses has been investigated to determining the total demagnification and the diameter of the electron beam coming out of it. The cross-over point inside the electron gun is considered as the object (do) with a diameters ranges of (10-100 µm) to find out the optical efficiency of the double lens...

In this paper, a symmetrical double pole piece magnetic lens has been designed as an objective lens to be used for electron microscope. Three different thickness (t= 4, 8, 12) mm of iron arm were chosen at a constant distance of (S=2 mm) between pole piece of lens. The results show that at (t= 8 mm) of iron arm thickness, a better optical propertie...

In this article, an objective magnetic lens was developed and its optical properties were analysed using simulation programs depending on finite elements method. Better optical properties, low values of electron probe diameter(dp) incident on specimen surface, spherical aberration (ds), chromatic aberration (dc), diffraction aberration (dd), Gaussi...

This work aims to study the behaviors and characteristics of the electron beam within the optical column in a thermionic scanning electron microscope (SEM) and the focusing capability using a numerical computation and an optics-based calculation. The beam spot size is estimated by theoretical calculation. Investigate the SEM performance for various...

The research aims to study the effect of changing the geometric shape of the poles and the distance between them on the focal properties in the condenser magnetic lens and thus the efficiency of the scanning electron microscope through its impact on the amount of miniaturization in the electronic beam passers-through optical column system lenses as...

The research aims to produce the theoretical study on the objective magnetic lens to estimate the electron probe diameter through the study of the parameters that effect on the efficiency of the scanning electron microscope, the optical performance of the objective lens depends used in the scanning electron microscope by ability to form precise ele...

The research aims to analysis of condenser magnetic lens in the scanning electron microscope using numerical analysis software and geometrical optics to know the behavior and characteristics of the electron beam and ability to focus it to decrease magnitude of aberrations which contribute decrease in a clear image and estimate the beam spot size th...

CITATIONS 0 READS 7 2 authors, including: Some of the authors of this publication are also working on these related projects: quadrupole magnetic and electrostatic lenses View project optoacoustic spectroscopy View project Nedhal Sadie the university of Mosul ,Iraq 19 PUBLICATIONS 4 CITATIONS SEE PROFILE All content following this page was uploaded...

The purpose of this research is to design optical fibers which can be used for different of practical applications and study its characteristics :critical angle ,numerical aperture .normalized frequency ,number modes ,effective area .which are all function of wavelength .fixing the cladding material which has the smaller refractive index and varyin...

5 (-‫العدد‬) 2 (2202 77 ‫المص‬ ‫البصرية‬ ‫االلياف‬ ‫خواص‬ ‫دراسة‬ ‫نع‬ ‫المطعمة‬ ‫السليكا‬ ‫من‬ ‫ة‬ ‫نجالء‬ ‫أوزار‬ ‫حسين‬ ‫عبداهلل‬ ‫محمد‬ ‫عيسى‬ ‫احمد‬ ‫الستار‬ ‫عبد‬ ‫حسن‬ ‫الفيزياء‬ ‫قسم‬ ‫العلوم‬ ‫كلية‬ ‫ـ‬ ‫كركوك‬ ‫جامعة‬ ‫اال‬ ‫تاريخ‬ ‫ستالم:‬ 2009/6 /17 ، ‫القبول:‬ ‫تاريخ‬ 25 2010 / 1 / ‫الخالصة‬ ‫الب‬ ‫من‬ ‫الهدف‬ ‫هو‬ ‫حث‬ ‫خواص‬ ‫ودراسة‬...

pure silica , 13.5 m/o GeO 2 +86.5 m/o SiO 2 , 7.0 m/o GeO 2 +93.0 m/o SiO 2 ّ 4.1 m/o GeO 2 +95.9 m/o SiO 2. ‫.ّتبخخٖوبر‬ ‫اهيلخرضوَ‬ ‫اهيوّاد‬ ‫ّهسيٖؼ‬ ‫اهيّسٕ‬ ‫هوعّل‬ ‫داهج‬ ‫االٌنشبر‬ ‫يؾبيل‬ ‫ضشبة‬ ‫شٖويٖرخى‬ ‫يؾبدهج‬ ‫ّتبشخخداى‬ ‫ضفب‬ ‫ّدراشج‬ ‫اهظّئٕ‬ ‫اهوٖف‬ ‫يً‬ ‫اٌّاػ‬ ‫ذالذج‬ ‫خضيٖى‬ ‫ذى‬ ‫ّاهغالف‬ ‫اهلوة‬ ‫هيبدخٕ‬ ‫يٌبشة‬ ‫,اهزاّٖج‬ ‫ا...