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TEM Basics

Condenser alignment

An important microscope alignment involves the centering of the condenser aperture about the optical axis. If the aperture is off-centre the beam is displaced away from the axis as the condenser lens is focused.

Try aligning the beam in the simulation opposite.

You will know that you have the correct setting of the x and y shifts when, as you change the C2 control, the beam opens concentrically about the cross at the centre of the screen.

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