ion source

in mass spectrometry
https://doi.org/10.1351/goldbook.I03247
Generally an assembly composed of: (i) an @[email protected] in which a stream of electrons flows from a hot filament across a stream of gas to collector (the potential between filament and collector is usually between 50 and 70 \(\text{V}\)); (ii) a device for the @[email protected] of these ions.
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2200 [Terms] [Paper]