The effect of the shape of the outer electrode arm on the bipolar lens and the study of its properties

In this paper, several innovative designs of magnetic lenses were designed, a bipolar lens with different geometries, where the outer pole arm denoted by symbol (L) was changed. With current density (6 A / m²) and after its design, geometric parameters studied in terms properties, then optical properties aberrations, i.e. coefficient spherical aberration chromatic aberration. Which led to minor changes some them, while others did not make any