Low energy electron beam for time-of-flight ionization measurements

Paulo Manuel Assis Loureiro Limão-vieira, Rui Filipe dos Reis Marmont Lobo

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

A low energy electron gun was assembled in a crossed molecular beam apparatus in order to monitorize the effusive molecular beam density using the electron impact technique. Electrons were analised in both time-of-flight and Faraday cup detectors. The electrons coming directly from the gun were clearly identified, allowing those ones coming from the ionization impact to be distinguished in time-of-flight with a multichannel analyser working in PHA mode. This set-up allows to make an estimation of the electron impact cross-section ratios in CCl4 and air.
Original languageEnglish
Pages (from-to)19-22
Number of pages4
JournalVacuum
Volume52
Issue number1-2
DOIs
Publication statusPublished - 1 Jan 1999

Keywords

  • Particle detectors
  • Vacuum technology
  • Electron beams
  • Impact ionization
  • Molecular beams

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