I've watched a few videos like this one and know the basic structure. We have an e-source, an anode which pulls electrons out, then a condenser which starts to focus all beams, scanning coils and finally the stage with our specimen.
Now I know the basics of how a magnetic lens works and how electrons behave when they enter one. Which is what I believe happens in the condenser in the video I linked.
But even though I have looked I have a hard time finding any info about the 'scanning coils' in particular. Could someone explain and/or link me something basic to understand what their purpose is?
In addition the more info I get about the working principle of a SEM the better. But I am mostly interested in the lenses and coils since they seem to be the least discussed.
Thanks in advance!