beam current

in in situ microanalysis
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.
PAC, 1983, 55, 2023. 'Nomenclature, symbols and units recommended for in situ microanalysis (Provisional)' on page 2026 (