Electron microscopy
 
Trapping Pumps/Entrainment Pumps
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   https://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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Trapping vacuum pumps (also called entrainment pumps) are a totally different mechanism to remove air molecules from a chamber. They ionize and accelerate air molecules with high voltage and cause them to attach to the sides of a chamber at high velocity or condense and attach the molecules onto a cold surface. However, they release the air molecules when the pumps are turned off or warmed up. These pumps mainly include ion pumps and cryo-pumps.

The trapping pumps require other type of pumps, typically mechanical pumps, to remove the entrapped molecules from their system.

 

 

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The book author (Yougui Liao) welcomes your comments, suggestions, and corrections, please click here for submission. If you let book author know once you have cited this book, the brief information of your publication will appear on the “Times Cited” page.