Figure 5
From: A new approach for fast field calculation in electrostatic electron lens design and optimization
Six different typical electrostatic lens systems (in 2D) taken as test systems for making the comparison of the methods of SOEM, FOEM and FEM. The colours indicate the voltages at each electrode. The primary beam passing through the lens system (in red, as taken from our raytracing codes in MATLAB using FEM field calculation) is sketched for a better visualisation of the lens system. The units along the axes of the graphs are in millimetres.
