ion source

in mass spectrometry
Generally an assembly composed of: (i) an @I03190@ 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 @A00051@ of these ions.
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2200 [Terms] [Paper]