diffusion pump


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Related to diffusion pump: Turbomolecular pump

diffusion pump

[də′fyü·zhən ‚pəmp]
(engineering)
A vacuum pump in which a stream of heavy molecules, such as mercury vapor, carries gas molecules out of the volume being evacuated; also used for separating isotopes according to weight, the lighter molecules being pumped preferentially by the vapor stream.
References in periodicals archive ?
The article illustrates typical types of furnace systems that use diffusion pumps or blowers backed by mechanical pumps.
The massive mechanical and diffusion pumps shown in Fig.
The new primary pumps are the ideal complement to Varian turbo and diffusion pumps in mass spectrometers and other analytical instruments.

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