Theoretical Study to Calculate the Focal length of Focusing System from Plasma Source

Abstract

Optical properties of ion beam passing through the quadruple magnetic lens
focusing system are discussed. The study included theoretical analysis using
matrices representation to calculate the focal length, lens power, effective
length and displacement (the bandwidth envelope) for Horizontal and Vertical
plane. Results showed the increasing in effective length caused decreasing in
focal length of the system for horizontal and vertical plane, the opposite action
appeared with lens power. Furthermore the increasing in effective length
caused decreasing in Horizontal displacement (beam envelope) for horizontal
plane, the opposite action appeared for vertical plane