Stop event

{
  "id": "MLC-T-CHM-011444",
  "term": "Stop event",
  "field": "Chemistry",
  "definition": "The detection of an ion arrival at the detector in time-of-flight secondary-ion mass spectrometry, registered by a time-to-digital converter, which ends a flight-time measurement begun by a start event such as the primary ion pulse. The interval between start and stop events gives the ion's flight time, from which its mass-to-charge ratio follows. Stop events from many pulse cycles are accumulated into a time histogram that forms the mass spectrum.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "primary ion",
    "secondary-ion mass spectrometry"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1845 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/stop-event/"
}