Effect of Pole Face Thickness on Magnetization of the Single-pole Magnetic Lens

An innovative design of a polepiece magnetic lens has been introduced so that the thickness of the pole face can be changed without affecting the other geometrical parameters of the lens, for a systematic study to develop the important region of ​​the pole face to improve the performance of single polepiece magnetic lenses and to get a high intensity magnetic overflow and a narrow half width. A study was conducted for each design that includes calculating the axial magnetic field and studying the magnetization of the lens by means of the finite element method using the (EOD) program to get the best design for the polepiece proposed in this study, it was found that the best magnetic properties and the highest value of magnetic flux and the lowest value of the axial magnetic field strength half-width were at the value of the pole face thickness equal to (0.5 mm). The effect of the magnetic circuit iron and the magnetic field of the coil on the total magnetic field produced from the designed polepiece magnetic lens was also studied.