Modelling of Atomic Imaging and Evaporation in the Field Ion Microscope

<table>(a) Values of field evaporation threshold voltage for <svg height="10.575" id="M57" style="vertical-align:-0.20064pt" version="1.1" viewbox="0 0 17.9625 10.575" width="17.9625" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.575)">
<g transform="translate(72,-63.54)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑊</tspan>
</text>
</g>
</g>
</svg>(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 <svg height="7.0124998" id="M58" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 9.4125004 7.0124998" width="9.4125004" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,7.0125)">
<g transform="translate(72,-66.39)">
<text transform="matrix(1,0,0,-1,-71.95,66.44)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝜅</tspan>
</text>
</g>
</g>
</svg> as a function of the ratio of tip length to end radius. Cone aspect ratio = 1 (opening angle 51.2°).</table>

Journal of Sensors

fig5

Figure 5

Figure 5: Modelling of Atomic Imaging and Evaporation in the Field Ion Microscope 