The investigation of true and a focal zoom-lens properties of five-element cylindrical electrostatic lens

الملخص EN

In the present work, a computational investigation has been considered on the true and a focal zoom-lens (i.e.

lenses whose magnification may be changed without losing focus) for the five-cylindrical electrostatic lens system, by the aid of the simulation program LENSYS, using the finite difference method .Results are obtained as a function of the ratio of the controlling voltages.

It was found that the five-cylindrical lens can be operated with the whole focus properties in a useful mode for controlling and focusing the charged particles in experimental studies.