Faraday cup collector

{
  "id": "MLC-T-CHM-004344",
  "term": "Faraday cup collector",
  "field": "Chemistry",
  "definition": "A device used in mass spectrometry and other vacuum systems to measure the intensity of an ion or electron beam. It consists of a conductive metal cup that intercepts the charged particles, which are then neutralized, producing a measurable electric current directly proportional to the number of particles arriving per unit time. This current is measured by a sensitive electrometer connected to the cup.",
  "synonyms": [
    "cylinder collector"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "references": [
    "Orange Book, 2nd ed., p. 204 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1553 (https://doi.org/10.1351/pac199163101541)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/faraday-cup-collector/"
}