Tungsten vs. CeB6 electron source: Choosing the right desktop SEM

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Considering a desktop SEM? Then it is important to determine what type of electron source fits your needs, since it has a direct effect on the quality of your output.

The electron source — or cathode, filament or electron gun — is one of the most important modules of a desktop SEM. Its purpose is to provide a stable beam of electrons. There are two groups of electron sources used in SEM, varying in the amount of current they produce into a small beam size (spot), the stability of the beam, and the lifetime of the source.

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