03247 IUPAC Gold Book - ion source 10.1351/goldbook.I03247 I03247 current 1 Generally an assembly composed of: (i) an ionization chamber 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 \(\pu{50 and 70 V}\)); (ii) a device for the acceleration of these ions. acceleration https://goldbook.iupac.org/terms/view/A00051 ionization chamber https://goldbook.iupac.org/terms/view/I03190 PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2200 (https://doi.org/10.1351/pac199062112167) https://goldbook.iupac.org/terms/view/I03247/html https://goldbook.iupac.org/terms/view/I03247/json https://goldbook.iupac.org/terms/view/I03247/plain Citation: 'ion source' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.I03247 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-07-25T03:35:54+00:00