Beam chopper

{
  "id": "MLC-T-CHM-001162",
  "term": "Beam chopper",
  "field": "Chemistry",
  "definition": "A device used to periodically interrupt or modulate a continuous beam of radiation or particles, creating a pulsed beam. This modulation allows for phase-sensitive detection, which can significantly reduce noise and improve the signal-to-noise ratio in analytical measurements. It is frequently employed in spectroscopic and surface analysis instruments.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "beam bunching",
    "ion beam"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1832 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/beam-chopper/"
}