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Numerical simulation of gridded electrostatic lens
G N Kropachev1, N N Alexeev, A I Balabin
1Institute for Theoretical and Experimental Physics, Moscow, Russia.
Abstract:
Gridded electrostatic lenses are frequently used in extraction systems and low energy ion beam transport line. Typically, for numerical simulation the grid is treated as a metal plate transparent for beam particles. The influence of real grid geometry on the beam dynamics in the gridded lens has been investigated by KOBRA-3d code. Beam emittance growth for different lens parameters has been investigated. Approximating expressions for obtained results are presented. The grid geometry providing minimal beam distortions is proposed.
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