Electron Gun Saturation
- Practical Electron Microscopy and Database -
- An Online Book -

http://www.globalsino.com/EM/  



 
This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
 

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In conventional EMs, the beam current increases with the increase of the filament current as shown in Figure 2705. However, the filament current will finally be increased to a level which produces no greater beam current, called gun saturation.

(a) The change of gun shape with increase of filament current, and (b) The variation of beam current with increase of the filament current.

Figure 2705. (a) The change of beam shape with increase of filament current, and (b) The variation of beam current with increase of the filament current.

 

 

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