Diffusion pump
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Diffusion pumps are high-vacuum pumps that use high-speed vapor jets to direct gas molecules to the exhaust. Invented by Wolfgang Gaede in 1915, they are used to produce high and ultra-high vacuum. Be
Ulvac oil diffusion pump cutaway
Diffusion pumps used on the Calutron mass spectrometers during the Manhattan Project, visible as black cylinders in the upper half of the image
![Early Langmuir mercury diffusion pump (vertical column) and its backing pump (in background), about 1920.[citation needed] The diffusion pump was wide](https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Langmuir_mercury_diffusion_pump.jpg/500px-Langmuir_mercury_diffusion_pump.jpg)
Early Langmuir mercury diffusion pump (vertical column) and its backing pump (in background), about 1920.[citation needed] The diffusion pump was widely used in manufacturing vacuum tubes, the key technology which dominated the radio and electronics industry for 50 years.[citation needed]
Vacuum pump
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A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was
Diffusion pump
…Diffusion pumps are high-vacuum pumps that use high-speed vapor jets to direct gas molecules to the exhaust. Invented by Wolfgang Gaede in 1915, they are used to produce high and ultra-high…
Student of Smolny Institute Catherine Molchanova with vacuum pump, by Dmitry Levitzky, 1776
A cutaway view of a turbomolecular high vacuum pump