A novel double-focusing time-of-flight mass spectrometer for absolute recoil ion cross sections measurements

In this work, the inclusion of an Einzel-like lens inside the time-of-flight drift tube of a standard mass spectrometer coupled to a gas cell—to study ionization of atoms and molecules by electron impact—is described. Both this lens and a conical collimator are responsible for further focalization o...

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Veröffentlicht in:Review of scientific instruments 2016-08, Vol.87 (8), p.083112-083112
Hauptverfasser: Sigaud, L., de Jesus, V. L. B., Ferreira, Natalia, Montenegro, E. C.
Format: Artikel
Sprache:eng
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Zusammenfassung:In this work, the inclusion of an Einzel-like lens inside the time-of-flight drift tube of a standard mass spectrometer coupled to a gas cell—to study ionization of atoms and molecules by electron impact—is described. Both this lens and a conical collimator are responsible for further focalization of the ions and charged molecular fragments inside the spectrometer, allowing a much better resolution at the time-of-flight spectra, leading to a separation of a single mass-to-charge unit up to 100 a.m.u. The procedure to obtain the overall absolute efficiency of the spectrometer and micro-channel plate detector is also discussed.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4961664