Figure 3
Imaging properties of the electrostatic lens EL. (a, b) Lens schematics and electron trajectories in the two axial cross sections along the E and θ directions, respectively, originating from the central and two ±2 eV and ±9.5° end points. (c) Image at the Au target formed by the ideal 25-point source. The broadening is shown artificially ×10 inflated. Due to the high accelerating voltage EL introduces negligible aberrations. |