Outward loops of emittance diagramm near to cathode
O. D. Potaphin
A new model of immersion objective was developed. The model includes two uniform fields: one them has the acceleration field strength, another is outward transversal field with negative potential. This model descrides the behaviour of outward branches of emittance diagramm near a cathode region rather well. There are character points of electron beam angles at the diagramm. The useful formulae were got. The electron trajectories were plotted.