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 language | English |
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Pages (from-to) | 19-22 |
Number of pages | 4 |
Journal | Vacuum |
Volume | 52 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1 Jan 1999 |
Keywords
- Particle detectors
- Vacuum technology
- Electron beams
- Impact ionization
- Molecular beams