Dynamic emittance matching

{
  "id": "MLC-T-CHM-003487",
  "term": "Dynamic emittance matching",
  "field": "Chemistry",
  "definition": "A technique used in ion beam analysis, particularly with raster scanning, to maintain optimal transmission of the ion beam through the mass spectrometer. It involves adjusting the potentials of the transfer optics in synchronization with the raster scan of the primary beam across the sample surface. This correction compensates for changes in the ion emission angle and position as the beam moves, maintaining a constant acceptance condition for the analyzer.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "raster"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1823 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/dynamic-emittance-matching/"
}