A Faraday cup is a metal (conductive) cup designed to catch charged particles in vacuum. The resulting current can be measured and used to determine the number of ions or electrons hitting the cup. The Faraday cup is named after Michael Faraday who first theorized ions around 1830.
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Famous quotes containing the word cup:
“The morning cup of coffee has an exhiliration about it which the cheering influence of the afternoon or evening cup of tea cannot be expected to reproduce.”
—Oliver Wendell Holmes, Sr. (1809–1894)
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