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Compressive/Mechanical pumps - Practical Electron Microscopy and Database - - An Online Book - |
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| 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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Mechanical, or called compressive, pumps work by compressing (reducing) a given volume of air (e.g. from SEM chambers and TEM columns), and then expelling the compressed air through an exhaust port. There are mainly two types of such pumps: The trapping pumps require other type of pumps, typically mechanical pumps, to remove the entrapped molecules from their system. Efficient mechanical pumps can achieve a vacuum better than 5 × 10−5 Torr. However, it becomes very inefficient at higher vacuums. Mechanical pumps are subject to contamination due to solvents being evacuated such as acetone, alcohols, and water.
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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. | ||||||||
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