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Updated: Jul 2, 2026

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation
Published on: October 30, 2012
Low background cold cathode ion source for molecular beam detection
M Faubel1, W M Holber, J P Toennies
1Max-Planck-Institut für Strömungsforschung, 34 Göttingen, Germany.
Abstract:
An extractor gauge type electron bombardment ion source using carbon fiber bundles as field electron emitters is described. The cold cathode permits operation of the ionizer within a liquid He cooled cryopump. The high pumping speed for all molecules (except helium) together with its low background pressure make this ion source a very promising detector for crossed molecular beam scattering experiments.
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