About this document
Understanding Electron Guns in SEM by Noe Rivera O is a document available to read on EtoBox.
The document discusses electron guns used in scanning electron microscopes. It describes three main types of electron guns: tungsten filament guns, lanthanum hexaboride guns, and field emission guns. Tungsten and LaB6 guns use thermionic emission, heating the filament to allow electrons to overcome the work function, while field emission uses a strong electric field to allow electron tunneling. The document focuses on thermionic guns, explaining how they work to produce a narrow, monochromatic electron beam
- Author
- Noe Rivera O
- Language
- EN