Research Article

Modelling of Atomic Imaging and Evaporation in the Field Ion Microscope

Figure 5

(a) Values of field evaporation threshold voltage for 𝑊 (110) tips consisting of a hemisphere on top of a conical shank for different shank and hemisphere sizes (b) effective values of field reduction factor 𝜅 as a function of the ratio of tip length to end radius. Cone aspect ratio = 1 (opening angle 51.2°).