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Glossary terms about Everhart-Thornley detector

Everhart-Thornley detector
A detector, mostly used for secondary electrons, used in high-vacuum SEMs.

5 pages mention Everhart-Thornley detector

Due to the low energies of secondary electrons (SE) (~2 to 50 eV) they are ejected only from near-surface layers. 
Generating an image
This is the case for the everhart-thornley detector which is most commonly used but there is another kind of In-lens SE detector in some machines. 
High vacuum mode and pump system
Note: In low vacuum operational mode it is not the low energies of SEs that limits their use; the main reason is due to arcing in the everhart-thornley detector as a result of the kV scale bias on the scintillator  
Sample preparation
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