beam current 

in in situ microanalysis
https://doi.org/10.1351/goldbook.B00621
The number of primary electrons reaching the surface of the specimen per unit time expressed as electrical current. Recommended symbol: iB; unit: A; typical range: nA. Recommended measurement technique: Faraday cage.
Source:
PAC, 1983, 55, 2023. (Nomenclature, symbols and units recommended for in situ microanalysis (Provisional)) on page 2026 [Terms] [Paper]
Citation: 'beam current' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.B00621 RIS BibTex EndNote
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Last revised: February 24, 2014