title: Low background cold cathode ion source for molecular beam detection.
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.
authors.affiliation: Max-Planck-Institut für Strömungsforschung, 34 Göttingen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Faubel
authors.forename: W M
authors.initials: WM
authors.lastname: Holber
authors.forename: J P
authors.initials: JP
authors.lastname: Toennies
mesh_terms: D003080:Cold Temperature; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007477:Ions; D011874:Radiometry / Q000295:instrumentation*; D014159:Transducers
chemical_list: D007477:Ions