Faraday cup

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English

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Etymology

Named after English scientist Michael Faraday (1791–1867), who first theorized ions around 1830.

Noun

Faraday cup (plural Faraday cups)

  1. A conductive metal cup designed to catch charged particles in vacuum.
    • 1996, IBM Journal of Research and Development, Volume 40, International Business Machines Corporation, page 74:
      The inner cylinder of the Faraday cup is electrically connected to the brass plug, and is the electrically active part of the unit.
    • 2007, Sabine Becker, Inorganic Mass Spectrometry: Principles and Applications, Wiley, page 103:
      In many mass spectrometers for electric ion detection a Faraday cup is generally used today for the direct and accurate measurement of ion currents of separated ion beams, especially if relatively high ion currents are to be measured.
    • 2014, Lothar Rottman et al., “Chapter 4: Technical Background”, in Thomas Prohaska, Johanna Irrgeher, Andreas Zitek, Norbert Jakubowski, editors, Sector Field Mass Spectrometry for Elemental and Isotopic Analysis, Royal Society of Chemistry, page 88:
      Faraday cups are the detectors of choice for precise and accurate isotope ratio measurements.

Translations

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