chemical ion pump

chemical ion pump

[′kem·i·kəl ′ī·ən ‚pəmp]
(chemical engineering)
A vacuum pump whose pumping action is based on evaporation of a metal whose vapor then reacts with the chemically active molecules in the gas to be evacuated.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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